First Revision No. 141-NFPA 13-2013 [ Global Input ... · First Revision No. 141-NFPA 13-2013 [ Global Input ] 8.15.1.2.18 Exterior Soffits, Eaves, Overhangs, and Decorative Frame

First Revision No. 141-NFPA 13-2013 [ Global Input ]

8.15.1.2.18 Exterior Soffits, Eaves, Overhangs, and Decorative FrameElements.

Submitter Information Verification

Submitter Full Name: [ Not Specified ]

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Submittal Date: Thu Aug 22 11:09:03 EDT 2013

Committee Statement

CommitteeStatement:

This section is intended to apply to exterior building features only. This is simply aclarification and not a technical change.

ResponseMessage:

Public Input No. 506-NFPA 13-2013 [Section No. 8.15.1.2.18.4]

National Fire Protection Association Report http://submittals.nfpa.org/TerraViewWeb/ContentFetcher?commentPara...

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16.1.10.1 In double-row and multiple-row open racks without solid shelves, a longitudinal (back-to-backclearance between loads) flue space shall not be required.16.2 Protection Criteria for Open Rack Storage of Class I Through Class IV Commodities Stored Upto and Including 25 ft (7.6 m) in Height.

16.2.1.3.3 Multiple-Row Racks — Storage Height Over 12 ft (3.7 m) Up to and Including 25 ft (7.6 m)Without Solid Shelves.

16.2.1.4.1.1 In single- or double-row racks without solid shelves, in-rack sprinklers shall be installed inaccordance with Table 16.2.1.3.2.

16.2.2.1 Protection of single-, double-, and multiple-row rack storage without solid shelves for Class Ithrough Class IV commodities shall be in accordance with Table 16.2.2.1.

Table 16.2.2.1: First column:

Storage Arrangement

Single-, double-, and multiple-row racks without solid shelves (no open-top containers)

Table 16.2.3.1 ESFR Sprinkler Protection of Rack Storage Without Solid Shelves of Class I ThroughClass IV Commodities Stored Up to and Including 25 ft (7.6 m) in Height

16.3 Protection Criteria for Open Rack Storage of Class I Through Class IV Commodities StoredOver 25 ft (7.6 m) in Height.

16.3.1.1* For single- and double-row racks, the water demand for nonencapsulated storage without solidshelves separated by aisles at least 4 ft (1.2 m) wide and with not more than 10 ft (3.1 m) between the topof storage and the sprinklers shall be in accordance with Table 16.3.1.1.

A.16.3.1.1 Water demand for storage height over 25 ft (7.6 m) on racks without solid shelves separated byaisles at least 4 ft (1.2 m) wide and with more than 10 ft (3.1 m) between the top of storage and thesprinklers should be based on

16.3.1.2 For multiple-row racks, the water demand for nonencapsulated storage without solid shelvesseparated by aisles at least 4 ft (1.2 m) wide and with not more than 10 ft (3.1 m) between the top ofstorage and the sprinklers shall be in accordance with Table 16.3.1.2.

16.3.1.3.1.1* Double-Row Racks.

(A) In double-row racks without solid shelves and with a maximum of 10 ft (3.1 m) between the top ofstorage and the ceiling, in-rack sprinklers shall be installed in accordance with Table 16.3.1.1 and Figure16.3.1.3.1.1(A)(a) through Figure 16.3.1.3.1.1(A)(j). The highest level of in-rack sprinklers shall be not morethan 10 ft (3.1 m) below the top of storage. Where a single-row rack is mixed with double-row racks, Table16.3.1.1 and Figure 16.3.1.3.1.1(A)(a) through Figure 16.3.1.3.1.1(A)(j) shall be used.

16.3.1.3.1.2* Single-Row Racks.

(A) In single-row racks without solid shelves with storage height over 25 ft (7.6 m) and a maximum of 10 ft(3.1 m) between the top of storage and the ceiling, sprinklers shall be installed in accordance with Figure16.3.1.3.1.2(A)(a) through Figure 16.3.1.3.1.2(A)(e).

Table 16.3.1.1 Single- or Double-Row Racks Without Solid Shelves of Class I Through Class IVCommodities Stored Over 25 ft (7.6 m) in Height with Aisles 4 ft (1.2 m) or More in Width

16.3.2.1 Protection of single-, double-, and multiple-row rack storage without solid shelves for Class Ithrough Class IV commodities shall be in accordance with Table 16.3.2.1.

Table 16.3.2.1: First Column

Storage Arrangement


Table 16.3.3.1 ESFR Sprinkler Protection of Rack Storage Without Solid Shelves of Class I ThroughClass IV Commodities Stored Over 25 ft (7.6 m) in Height

17.1.9.1 In double- and multiple-row open racks without solid shelves, a longitudinal (back-to-backclearance between loads) flue space shall not be required.


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17.2 Protection Criteria for Open Rack Storage of Plastics Commodities Stored Up to and Including25 ft (7.6 m) in Height.

17.2.2.1 Protection of single-, double-, and multiple-row rack storage without solid shelves for unexpandedplastic commodities shall be in accordance with Table 17.2.2.1.

Table 17.2.2.1 CMSA Sprinkler Design Criteria for Single-, Double-, and Multiple-Row Racks WithoutSolid Shelves of Plastics Commodities Stored Up and Including 25 ft (7.6 m) in Height

And First Column:


Table 17.2.3.1 ESFR Protection of Rack Storage Without Solid Shelves of Plastics CommoditiesStored Up to and Including 25 ft (7.6 m) in Height

17.3 Protection Criteria for Open Rack Storage of Plastics Commodities Stored Over 25 ft (7.6 m) inHeight.

17.3.2.1 Protection of single-, double-, and multiple-row rack storage without solid shelves for cartoned,nonexpanded plastic commodities shall be in accordance with Table 17.3.2.1.

Table 17.3.2.1 CMSA Sprinkler Design Criteria for Single-, Double-, and Multiple-Row Racks WithoutSolid Shelves of Plastics Commodities Stored Over 25 ft (7.6 m) in Height

And First Column:

Single-, double-, and multiple-row, racks without solid shelves plastics (no open-top containers)

Table 17.3.3.1 ESFR Protection of Rack Storage Without Solid Shelves of Plastics CommoditiesStored Over 25 ft (7.6 m) in Height




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Submittal Date: Sun Aug 25 09:35:14 EDT 2013

Committee Statement

CommitteeStatement:

It was previously unstated that racks without solid shelves meant open racks. Last cycle removedsome references to w/o solid shelves due to the recognition that we do use the criteria for open rackswhen they have solid shelves when combined with solid shelving criteria as shown by deletingwithout solid shelves from Table 16.2.1.3.2 and adding section 16.2.3.2. It was not applied overall.This change is intended to be just editorial in applying that understanding. Although the change tothe title 16.2 covers the CMSA and ESFR, it may be worth repeating the open rack statement withintheir sections.

ResponseMessage:

Public Input No. 85-NFPA 13-2013 [Global Input]


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Throughout the standard, change "uncartoned" to "exposed", "nonexpanded" to "unexpanded" and"unencapsulated" to "nonencapsultated"




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Committee Statement

CommitteeStatement:

During the previous cycle, in Proposal 13-449, the submitter requested that in the rewrite of Chapter17 these changes be made, so that the text would be standardized with the Decision Tree, Figure17.1.2.1. In the Committee Meeting Action this appears to have been accepted, but it does notappear to have been fully put into effect in Chapter 17. Further to this, those same revisions shouldbe made throughout the standard. For clarity, the verbiage used should always be consistent.

ResponseMessage:





Public Input No. 295-NFPA 13-2013 [Section No. 16.2.3.1]

Public Input No. 296-NFPA 13-2013 [Section No. 21.2.2]



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Additionally, revise the term “plastic and rubber” to “Group A plastic” in the following locations:

15.2.7 Table 15.2.6(a) Table 15.2.6(b) 15.3 15.3.1 15.4 15.4.4 Table 15.3.1 Table 15.4.1




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Committee Statement

CommitteeStatement:

As currently written it is unclear which sections in Chapter 15 are referring to plastic and rubbercommodities in general and which sections are speaking specifically to plastics and rubber that fit theGroup A plastic classification. Further, since the majority of Chapter 15 (ie. everything after 15.2.5)actually deals with just Group A commodities, the text seems to suggest that all rubber commoditiesare considered to be Group A plastics. Because 5.6.4 explains which rubber products are Group Aand which are classified as Class B, it is not necessary to repeatedly refer to “rubber” after 15.2.2.

ResponseMessage:



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Also revise the terms “plastic” and “plastics” to “Group A plastic” in the following locations:

17.1.2.2 Table 17.1.4.1 17.2 17.2.1 Figures 17.2.1.4(a) through 17.2.1.4(l) 17.2.2 17.2.2.1

17.2.3 Table 17.2.2.1 17.2.3.1 Table 17.2.3.1 17.3 17.3.1 Table 17.3.1.3 17.3.1.6 17.3.1.7

Figure 17.3.1.7 Figures 17.3.1.8(a) through 17.3.1.8(f) Table 17.3.1.15 17.3.2 17.3.2.1 Table17.3.2.1

17.3.3 17.3.3.1 Table 17.3.3.1




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Committee Statement

CommitteeStatement:

As currently written it is unclear which sections in Chapter 17 are referring to plastic and rubbercommodities in general and which sections are speaking specifically to materials that fit the Group Aplastic classification. Section 17.1.2.6 is actually speaking to Group A plastics, as are all succeedingreferences to plastic throughout the rest of Chapter 17. For clarity, it should be specifically stated.

ResponseMessage:



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16.3.1.1* For single- and double-row racks, the water demand for nonencapsulated storagewithout solid shelves separated by aisles at least 4 ft (1.2 m) wide and with not morethan a clearance to ceiling up to and including 10 ft (3.1 m) between the top of storage andthe sprinklers shall be in accordance with Table 16.3.1.1.

16.3.1.2 For multiple-row racks, the water demand for nonencapsulated storage withoutsolid shelves separated by aisles at least 4 ft (1.2 m) wide and with not more than aclearance to ceiling up to and including 10 ft (3.1 m) between the top of storage and thesprinklers shall be in accordance with Table 16.3.1.2.

17.2.1 Control Mode Density/Area Sprinkler Protection Criteria for Single-, Double-,and Multiple-Row Racks for Plastics Commodities Stored Up to and Including 25 ft(7.6 m) in Height, with a Clearance to Ceiling Up to and Including 10 ft (3.1 m).

17.2.1.2.1 For Group A plastic commodities in cartons, encapsulated or nonencapsulatedin single-, double-, and multiple- row racks and with a clearance to ceiling up to andincluding 10 ft. (3.1 m), ceiling sprinkler water demand in terms of density [gpm/ft2(mm/min)] and area of operation [ft2 (m2)] shall be selected from Figure 17.2.1.2.1(a)through Figure 17.2.1.2.1(f).

17.3.1.1 Protection of Group A plastics in cartons, expanded or nonexpanded, whetherencapsulated or nonencapsulated racks and with a clearance to ceiling up to and including10 ft. (3.1 m), shall be permitted using control mode density/area sprinklers in accordancewith 17.3.1.

17.3.1.2 Protection of Group A plastics that are exposed and nonexpanded, whetherencapsulated or nonencapsulated racks and with a clearance to ceiling up to and including10 ft. (3.1 m), shall be permitted only using in-rack sprinkler arrangements that arespecifically permitted to be used with exposed nonexpanded plastics.




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Committee Statement

CommitteeStatement:

No consistency on how the clearance to ceiling is identified. 16.2 uses "between top of storageand sprinklers", 17.2 identifies the requirement only in the title, and 17.3 does not state it at all.(Used the same phrase from 17.2 for consistency)

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23.7 23.5 Pipe Schedules

23.5 23.6 Deluge Systems

23.6 23.7* Exposure Protection Sprinkler System

23.4.5 23.8 In-Rack Sprinklers

23.4.6 23.9 Hose Allowance




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Submittal Date: Mon Aug 26 13:01:27 EDT 2013

Committee Statement

CommitteeStatement:

23.6 and 23.7 are both hydraulically calculated systems so are more easy found if theyimmediately follow the hydraulic calculation procedures. 23.8 and 23.9 are part of the hydrauliccalculation procedure so should be located in the section on hydraulic calculation procedures. Pipeschedule criteria should come after the hydraulic related material

ResponseMessage:



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This Revision reaffirms the Committees position on the TIAs that were generated after the ROC meetingduring the A12 revision cycle.

Supplemental Information

File Name Description

13_P_29_Rec_from_TIA.FR284.pdf


Submitter Full Name: Jeanne Moreau-Correia

Organization: NFPA

Street Address:

City:

State:

Zip:

Submittal Date: Thu Oct 03 08:41:29 EDT 2013

Committee Statement

CommitteeStatement:

Note: This Proposal originates from Tentative Interim Amendment 13-13-1 (TIA 1066) issued by theStandards Council on August 9, 2012. The information provided in the Fire Protection ResearchFoundation report “Antifreeze Solutions Supplied through Spray Sprinklers: Interim Report” illustratesthat under certain conditions (pressure, fire size, k-factor, ceiling height, deflector design…etc) a 50%glycerine solution is capable of igniting and causing a dramatic increase in heat release rate. As notedin the FPRF report, these results highlight the “complicated interaction between sprinkler spray andthe ignition source.”As a result of this additional testing, there are more questions that need to beanswered, and the testing shows that concentrations of anti-freeze that previous testing indicated wereacceptable and would not support combustion actually do with a stronger ignition source. In addition,sprinklers with larger orifices that require lower pressure than typical residential sprinklers andpotentially a lager droplet distribution also ignited. It is clear that further testing is need to fullyunderstand under what conditions an anti-freeze solutions are safe, anti-freeze solutions can not beallowed in sprinkler systems. This TIA calls for the use of Listed Antifreeze Solutions. Using listedantifreeze solutions will ensure that the solution discharged from a sprinkler system will not ignite orcause a dramatic increase in heat release rate of a fire. The process for developing listed products willalso allow for a continued improvement in fire and life safety in environments meeting the NFPA Codesand Standards. This TIA also calls for the continued acceptance of currently listed ESFR AntifreezeSystems. The listing process has already shown that, in some cases, it is possible to use currentantifreeze solutions to provide the level of protection prescribed by NFPA 13. For this reason, it isproposed to allow the continued use of propylene-glycol solutions in systems and in protectionscenarios that have been thoroughly tested to demonstrate such results. There are ESFR systemscurrently available that have been specifically tested and listed with a specific model of sprinkler andsolution delivery method that provide an appropriate level of protection as to be considered “EarlySuppression”. Emergency Nature: The latest testing from The Fire Protection Research Foundationtitled Antifreeze Solutions Supplied through Spray Sprinklers Interim Report (dated February 2012)shows that anti-freeze concentrations currently allowed in new NFPA 13 sprinkler systems maysupport combustion and increase the size of the fire. This is a safety issue that requires changes in thestandard. The following are two items which make this TIA of emergency nature. Only one is requiredfor substantiation of an emergency nature. (d) The proposed TIA intends to offer to the public a benefitthat would lessen a recognized (known) hazard or ameliorate a continuing dangerous condition orsituation During the latest revision cycle the committee evaluated the test data that was present at thetime of the cycle. The committee could not anticipate that additional data would change our


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justifications during the process. The new data demonstrates that variables utilized in the developmentof the 2013 edition may lead to changes in the fire involvement. Propylene glycol and glycerinantifreeze solutions discharged from sprinklers have the potential to ignite under certain conditions.Research testing has indicated that several variables may influence the potential for large scaleignition of the antifreeze solution discharged from a sprinkler. These variables include, but are notlimited to, the concentration of antifreeze solution, sprinkler discharge characteristics, inlet pressure atthe sprinkler, location of fire relative to the sprinkler, and size of fire at the time of sprinkler discharge.(f ) The proposed TIA intends to correct a circumstance in which the revised document has resulted inan adverse impact on a product or method that was inadvertently overlooked in the total revisionprocess, or was without adequate technical (safety) justification for the action. Antifreeze solutionshave been subject to recent testing and the new data shows that the installations found within thestandard do not account for the complete safety of the occupant. The data appears to provideadditional questions and challenges the parameters of installation found in the standard. The use ofpropylene glycol and glycerin antifreeze solutions should only be considered when other sprinklersystem design alternatives are not available or practical. If these solutions are used, all relevant dataand information should be carefully reviewed and considered in the sprinkler system.

ResponseMessage:



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Report on Proposals – June 2015 NFPA 13_______________________________________________________________________________________________13- Log #12 AUT-SSI

_______________________________________________________________________________________________

Terry L. Victor, Tyco/SimplexGrinnell

A mixture of an antifreeze material with water that is prepared and factory mixedby the manufacturer with a quality control procedure in place that ensures that the antifreeze solution remainshomogeneous and that the concentration is as specified.

The use of antifreeze solutions shall be in conformity with state and local health regulations.

Antifreeze shall not be used in ESFR systems unless at least one of the following two conditions is met theESFR sprinkler is listed for use with the antifreeze solution.(1) For antifreeze solutions not referenced in this standard, the antifreeze solution shall be specifically listed for ESFRapplications.(2) For antifreeze solutions referenced in this standard, the ESFR sprinkler shall be specifically listed for use with theantifreeze solution.(3) The ambient temperature of the protected area shall be above 25°F (-4°C) and a propylene glycol mixture of notgreater than 25% by volume is provided. [

Except as permitted in 7.6.2.2, antifreeze solutions shall be listed for use in sprinkler systems. Antifreezesolutions shall be premixed by the manufacturer.

Premixed antifreeze solutions of propylene glycol shall be permitted to be used with ESFR sprinklers where theESFR sprinklers are listed for such use in a specific application.

Antifreeze solutions shall be limited to premixed antifreeze solutions of glycerin (chemically pure or UnitedStates Pharmacopoeia 96.5%) at a maximum concentration of 48% by volume, or propylene glycol at a maximumconcentration of 38% by volume.

Premixed antifreeze solutions of propylene glycol exceeding 40% concentration by volume shall be permittedfor use with ESFR sprinklers where the ESFR sprinklers are listed for such use in a specific application.

Premixed antifreeze solutions other than those described in 7.6.2.1 that are listed for use in sprinkler systemsshall be permitted to be used.

All premixed antifreeze solutions shall be provided with a certificate from the manufacturer indicating the typeof antifreeze, concentration by volume, and freezing point.

Glycerine–water and propylene glycol–water mixtures shown in Table A.7.6.2.2 shall be considered suitable foruse.

A premix antifreeze solution with a freezing point below the expected minimum temperature for the locality shallbe provided.

1Printed on 1/24/2013

Report on Proposals – June 2015 NFPA 13Automatic sprinklers in areas subject to freezing shall be on dry pipe systems conforming to Section 7.2, on

antifreeze systems conforming to Section 7.6, or be dry sprinklers of an adequate length connected to wet pipe systemslocated in heated areas.

Information about listed antifreeze solution used (type and amount).

For antifreeze solutions systems greater than 40 gal (151 L) in size, the friction loss shall also be calculatedusing the Darcy–Weisbach formula:(no change to Equation)

7

The definition of an antifreeze system states that water will discharge after the antifreeze leaves the pipes.Systems that are all antifreeze, including tanks of antifreeze solution that will not discharge plain water, are not trueantifreeze systems. Such systems should not be used without consideration to issues such as the combustibility of theantifreeze solution and the friction loss in the piping during cold conditions. Any listing associated with an antifreezesprinkler system should address the inability for the specific antifreeze solution tested to ignite when discharged fromspecific sprinklers.

Listed CPVC nonmetallic sprinkler pipe and fittings should be protected from freezing with glycerine compatiblelisted solutions only. In addition, due to antifreeze solution limitations other methods of freeze protection such as electricheat-tracing, or insulated coverings, which are approved for use on CPVC nonmetallic piping may be used to protectCPVC nonmetallic pipes from freezing. The use of diethylene, ethylene, or propylene glycols is specifically prohibited.Laboratory testing shows that glycol-based antifreeze solutions present a chemical environment detrimental to CPVC.

The following is a list of research reports that have been issued by the Fire Protection Research Foundation related tothe use of antifreeze in sprinkler systems:

, Fire ProtectionResearch Foundation, June 2010.

, Fire Protection ResearchFoundation, December 2010.

, Fire Protection Research Foundation,February 2012.

INSERT Table in A.7.6.2_L12_R

Where existing antifreeze systems have been analyzed and approved to remain in service, antifreezesolutions should be limited to premixed antifreeze solutions of glycerin (chemically pure or United StatesPharmacopoeia 96.5%) at a maximum concentration of 48% by volume, or propylene glycol at a maximumconcentration of 38% by volume. [ROP-33] The use of antifreeze solutions in all new sprinkler systems should berestricted to listed antifreeze solutions only. Where existing antifreeze systems are in service, the solution concentrationshould be limited to those noted in A.7.6.2.1 and the system requires an analysis and approval of the AHJ to remain inservice.

See the premixed antifreeze manufacturer’s technical data sheets to determine the freeze point of thesolution.


Report on Proposals – June 2015 NFPA 13

All permitted antifreeze solutions are heavier than water. At the point of contact (interface), the heavier liquidwill be below the lighter liquid, preventing diffusion of water into the unheated areas.

The information provided in the Fire Protection Research Foundation report “Antifreeze SolutionsSupplied through Spray Sprinklers: Interim Report” illustrates that under certain conditions (pressure, fire size, k-factor,ceiling height, deflector design…etc) a 50% glycerine solution is capable of igniting and causing a dramatic increase inheat release rate. As noted in the FPRF report, these results highlight the “complicated interaction between sprinklerspray and the ignition source.”As a result of this additional testing, there are more questions that need to be answered,and the testing shows that concentrations of anti-freeze that previous testing indicated were acceptable and would notsupport combustion actually do with a stronger ignition source. In addition, sprinklers with larger orifices that requirelower pressure than typical residential sprinklers and potentially a lager droplet distribution also ignited. It is clear thatfurther testing is need to fully understand under what conditions an anti-freeze solutions are safe, anti-freeze solutionscan not be allowed in sprinkler systems.

This TIA calls for the use of Listed Antifreeze Solutions. Using listed antifreeze solutions will ensure that the solutiondischarged from a sprinkler system will not ignite or cause a dramatic increase in heat release rate of a fire. Theprocess for developing listed products will also allow for a continued improvement in fire and life safety in environmentsmeeting the NFPA Codes and Standards.

This TIA also calls for the continued acceptance of currently listed ESFR Antifreeze Systems. The listing process hasalready shown that, in some cases, it is possible to use current antifreeze solutions to provide the level of protectionprescribed by NFPA 13. For this reason, it is proposed to allow the continued use of propylene-glycol solutions insystems and in protection scenarios that have been thoroughly tested to demonstrate such results. There are ESFRsystems currently available that have been specifically tested and listed with a specific model of sprinkler and solutiondelivery method that provide an appropriate level of protection as to be considered “Early Suppression”.

The latest testing from The Fire Protection Research Foundation titled(dated February 2012) shows that anti-freeze concentrations

currently allowed in new NFPA 13 sprinkler systems may support combustion and increase the size of the fire. This is asafety issue that requires changes in the standard.

The following are two items which make this TIA of emergency nature. Only one is required for substantiation of anemergency nature.

(d)During the latest revision cycle the committee evaluated the

test data that was present at the time of the cycle. The committee could not anticipate that additional data wouldchange our justifications during the process. The new data demonstrates that variables utilized in the development ofthe 2013 edition may lead to changes in the fire involvement.

Propylene glycol and glycerin antifreeze solutions discharged from sprinklers have the potential to ignite under certainconditions. Research testing has indicated that several variables may influence the potential for large scale ignition ofthe antifreeze solution discharged from a sprinkler. These variables include, but are not limited to, the concentration ofantifreeze solution, sprinkler discharge characteristics, inlet pressure at the sprinkler, location of fire relative to thesprinkler, and size of fire at the time of sprinkler discharge.

Antifreeze solutions have been subject to recent testing andthe new data shows that the installations found within the standard do not account for the complete safety of theoccupant. The data appears to provide additional questions and challenges the parameters of installation found in thestandard.

The use of propylene glycol and glycerin antifreeze solutions should only be considered when other sprinkler systemdesign alternatives are not available or practical. If these solutions are used, all relevant data and information should becarefully reviewed and considered in the sprinkler system.


Report on Proposals – June 2015 NFPA 13



The revision reconfirms the committees position on the TIAs that were generated after the ROC meetingduring the A12 revision cycle.

See attached TIA



13_P_29_Rec_from_TIA.G1359051993614.pdf



Organization: NFPA

Street Address:

City:

State:

Zip:

Submittal Date: Sun Oct 06 18:51:19 EDT 2013

Committee Statement

CommitteeStatement:

Note: This Proposal originates from Tentative Interim Amendment 13-13-1 (TIA 1066) issued by theStandards Council on August 9, 2012. The information provided in the Fire Protection ResearchFoundation report “Antifreeze Solutions Supplied through Spray Sprinklers: Interim Report” illustratesthat under certain conditions (pressure, fire size, k-factor, ceiling height, deflector design…etc) a 50%glycerine solution is capable of igniting and causing a dramatic increase in heat release rate. As notedin the FPRF report, these results highlight the “complicated interaction between sprinkler spray andthe ignition source.”As a result of this additional testing, there are more questions that need to beanswered, and the testing shows that concentrations of anti-freeze that previous testing indicated wereacceptable and would not support combustion actually do with a stronger ignition source. In addition,sprinklers with larger orifices that require lower pressure than typical residential sprinklers andpotentially a lager droplet distribution also ignited. It is clear that further testing is need to fullyunderstand under what conditions an anti-freeze solutions are safe, anti-freeze solutions can not beallowed in sprinkler systems. This TIA calls for the use of Listed Antifreeze Solutions. Using listedantifreeze solutions will ensure that the solution discharged from a sprinkler system will not ignite orcause a dramatic increase in heat release rate of a fire. The process for developing listed products willalso allow for a continued improvement in fire and life safety in environments meeting the NFPA Codesand Standards. This TIA also calls for the continued acceptance of currently listed ESFR AntifreezeSystems. The listing process has already shown that, in some cases, it is possible to use currentantifreeze solutions to provide the level of protection prescribed by NFPA 13. For this reason, it isproposed to allow the continued use of propylene-glycol solutions in systems and in protectionscenarios that have been thoroughly tested to demonstrate such results. There are ESFR systemscurrently available that have been specifically tested and listed with a specific model of sprinkler andsolution delivery method that provide an appropriate level of protection as to be considered “EarlySuppression”. Emergency Nature: The latest testing from The Fire Protection Research Foundationtitled Antifreeze Solutions Supplied through Spray Sprinklers Interim Report (dated February 2012)shows that anti-freeze concentrations currently allowed in new NFPA 13 sprinkler systems maysupport combustion and increase the size of the fire. This is a safety issue that requires changes in thestandard. The following are two items which make this TIA of emergency nature. Only one is requiredfor substantiation of an emergency nature. (d) The proposed TIA intends to offer to the public a benefitthat would lessen a recognized (known) hazard or ameliorate a continuing dangerous condition or


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situation During the latest revision cycle the committee evaluated the test data that was present at thetime of the cycle. The committee could not anticipate that additional data would change ourjustifications during the process. The new data demonstrates that variables utilized in the developmentof the 2013 edition may lead to changes in the fire involvement. Propylene glycol and glycerinantifreeze solutions discharged from sprinklers have the potential to ignite under certain conditions.Research testing has indicated that several variables may influence the potential for large scaleignition of the antifreeze solution discharged from a sprinkler. These variables include, but are notlimited to, the concentration of antifreeze solution, sprinkler discharge characteristics, inlet pressure atthe sprinkler, location of fire relative to the sprinkler, and size of fire at the time of sprinkler discharge.(f ) The proposed TIA intends to correct a circumstance in which the revised document has resulted inan adverse impact on a product or method that was inadvertently overlooked in the total revisionprocess, or was without adequate technical (safety) justification for the action. Antifreeze solutionshave been subject to recent testing and the new data shows that the installations found within thestandard do not account for the complete safety of the occupant. The data appears to provideadditional questions and challenges the parameters of installation found in the standard. The use ofpropylene glycol and glycerin antifreeze solutions should only be considered when other sprinklersystem design alternatives are not available or practical. If these solutions are used, all relevant dataand information should be carefully reviewed and considered in the sprinkler system.

ResponseMessage:



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The revision reconfirms the committees position on the TIAs that were generated after the ROC meetingduring the A12 revision cycle.

See attached.



13_P_29_Rec_from_TIA.G1359052084306.pdf



Organization: NFPA

Street Address:

City:

State:

Zip:

Submittal Date: Sun Oct 06 19:36:35 EDT 2013

Committee Statement

CommitteeStatement:

Note: This Proposal originates from Tentative Interim Amendment 13-13-1 (TIA 1066) issued by theStandards Council on August 9, 2012. The information provided in the Fire Protection ResearchFoundation report “Antifreeze Solutions Supplied through Spray Sprinklers: Interim Report” illustratesthat under certain conditions (pressure, fire size, k-factor, ceiling height, deflector design…etc) a 50%glycerine solution is capable of igniting and causing a dramatic increase in heat release rate. As notedin the FPRF report, these results highlight the “complicated interaction between sprinkler spray andthe ignition source.”As a result of this additional testing, there are more questions that need to beanswered, and the testing shows that concentrations of anti-freeze that previous testing indicated wereacceptable and would not support combustion actually do with a stronger ignition source. In addition,sprinklers with larger orifices that require lower pressure than typical residential sprinklers andpotentially a lager droplet distribution also ignited. It is clear that further testing is need to fullyunderstand under what conditions an anti-freeze solutions are safe, anti-freeze solutions can not beallowed in sprinkler systems. This TIA calls for the use of Listed Antifreeze Solutions. Using listedantifreeze solutions will ensure that the solution discharged from a sprinkler system will not ignite orcause a dramatic increase in heat release rate of a fire. The process for developing listed products willalso allow for a continued improvement in fire and life safety in environments meeting the NFPA Codesand Standards. This TIA also calls for the continued acceptance of currently listed ESFR AntifreezeSystems. The listing process has already shown that, in some cases, it is possible to use currentantifreeze solutions to provide the level of protection prescribed by NFPA 13. For this reason, it isproposed to allow the continued use of propylene-glycol solutions in systems and in protectionscenarios that have been thoroughly tested to demonstrate such results. There are ESFR systemscurrently available that have been specifically tested and listed with a specific model of sprinkler andsolution delivery method that provide an appropriate level of protection as to be considered “EarlySuppression”. Emergency Nature: The latest testing from The Fire Protection Research Foundationtitled Antifreeze Solutions Supplied through Spray Sprinklers Interim Report (dated February 2012)shows that anti-freeze concentrations currently allowed in new NFPA 13 sprinkler systems maysupport combustion and increase the size of the fire. This is a safety issue that requires changes in thestandard. The following are two items which make this TIA of emergency nature. Only one is requiredfor substantiation of an emergency nature. (d) The proposed TIA intends to offer to the public a benefitthat would lessen a recognized (known) hazard or ameliorate a continuing dangerous condition or


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situation During the latest revision cycle the committee evaluated the test data that was present at thetime of the cycle. The committee could not anticipate that additional data would change ourjustifications during the process. The new data demonstrates that variables utilized in the developmentof the 2013 edition may lead to changes in the fire involvement. Propylene glycol and glycerinantifreeze solutions discharged from sprinklers have the potential to ignite under certain conditions.Research testing has indicated that several variables may influence the potential for large scaleignition of the antifreeze solution discharged from a sprinkler. These variables include, but are notlimited to, the concentration of antifreeze solution, sprinkler discharge characteristics, inlet pressure atthe sprinkler, location of fire relative to the sprinkler, and size of fire at the time of sprinkler discharge.(f ) The proposed TIA intends to correct a circumstance in which the revised document has resulted inan adverse impact on a product or method that was inadvertently overlooked in the total revisionprocess, or was without adequate technical (safety) justification for the action. Antifreeze solutionshave been subject to recent testing and the new data shows that the installations found within thestandard do not account for the complete safety of the occupant. The data appears to provideadditional questions and challenges the parameters of installation found in the standard. The use ofpropylene glycol and glycerin antifreeze solutions should only be considered when other sprinklersystem design alternatives are not available or practical. If these solutions are used, all relevant dataand information should be carefully reviewed and considered in the sprinkler system.

ResponseMessage:

Public Input No. 34-NFPA 13-2013 [Section No. 23.4.2.1.3]


14 of 474 11/7/2013 12:33 PM


Extract Chapter 10 from NFPA 24 2016 Ed as Chapter 10 of NFPA 13 2016 ed.



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Committee Statement

CommitteeStatement:

Chapter 10 of NFPA 13 is extracted from NFPA 24. This Global Input updates Chapter 10 ofNFPA 13 to the new language in NFPA 24 2016 ed.

ResponseMessage:


15 of 474 11/7/2013 12:33 PM

Important Notice: The document has been provided in Microsoft Word format for the purpose of Technical Committee/Task Group work. This document is the copyright property of the National Fire Protection Association (NFPA), Copyright © 2012 NFPA, and may not be used for any other purpose or distributed to any other persons or parties outside of the NFPA Technical Committee.

Chapter 10 Underground PipingRequirements

10.1* Piping Materials.

10.1.1* Listing. Piping shall be listed for fire protection service or shall comply with the standards in Table 10.1.1.

10.1.1 All piping used in private fire service mains shall be in accordance with 10.1.1.1, 10.1.1.2 or 10.1.1.3.

10.1.1.1 Piping manufactured in accordance with Table 10.1.1.1 shall be permitted to be used.

Table 10.1.1.11 Manufacturing Standards for Underground Pipe

Materials and Dimensions Standard

Ductile Iron

Cement Mortar Lining for Ductile Iron Pipe and Fittings for Water AWWA C104

Polyethylene Encasement for Ductile Iron Pipe Systems AWWA C105

Ductile Iron and Gray Iron Fittings, 3 in. Through 48 in., for Water and Other Liquids

AWWA C110

Rubber-Gasket Joints for Ductile Iron Pressure Pipe and Fittings AWWA C111

Flanged Ductile Iron Pipe with Ductile Iron or Gray Iron Threaded Flanges AWWA C115

Protective Fusion-Bonded Epoxy Coatings for the Interior and Exterior Surfaces of Ductile-Iron and Gray-Iron Fittings for Water Supply Service

AWWA C116

Thickness Design of Ductile Iron Pipe AWWA C150

Ductile Iron Pipe, Centrifugally Cast for Water AWWA C151

Ductile-Iron Compact Fittings for Water Service AWWA C153

Standard for the Installation of Ductile Iron Water Mains and Their Appurtenances

AWWA C600

Steel

Steel Water Pipe 6 in. and Larger AWWA C200

Coal-Tar Protective Coatings and Linings for Steel Water Pipelines Enamel and Tape — Hot Applied

AWWA C203

Cement-Mortar Protective Lining and Coating for Steel Water Pipe 4 in. and Larger — Shop Applied

AWWA C205

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Field Welding of Steel Water Pipe AWWA C206

Steel Pipe Flanges for Waterworks Service — Sizes 4 in. Through 144 in. AWWA C207

Dimensions for Fabricated Steel Water Pipe Fittings AWWA C208

A Guide for Steel Pipe Design and Installation AWWA M11

Concrete

Reinforced Concrete Pressure Pipe, Steel-Cylinder Type AWWA C300

Prestressed Concrete Pressure Pipe, Steel-Cylinder Type AWWA C301

Reinforced Concrete Pressure Pipe, Non-Cylinder Type AWWA C302

Reinforced Concrete Pressure Pipe, Steel-Cylinder Type, Pretensioned AWWA C303

Standard for Asbestos-Cement Distribution Pipe, 4 in. Through 16 in., for Water Distribution Systems

AWWA C400

Standard for the Selection of Asbestos-Cement Pressure Pipe AWWA C401

Cement-Mortar Lining of Water Pipe Lines 4 in. and Larger — in Place AWWA C602

Standard for the Installation of Asbestos-Cement Water Pipe AWWA C603

Plastic

Polyvinyl Chloride (PVC) Pressure Pipe, 4 in. Through 12 in., for Water Distribution

AWWA C900

Polyvinyl Chloride (PVC) Pressure Pipe, 14 in. Through 48 in., for Water Distribution

AWWA C905

Polyethylene (PE) Pressure Pipe and Fittings, 4 in. (100 mm) Through 63 in. (1575 mm) for Water Distribution

AWWA C906

Molecularly Oriented Polyvinyl Chloride (PVCO) 4-24 in…… AWWA C909

CopperBrass

Specification for Seamless Red Brass Pipe

ASTM B43

Copper Specification for Seamless Copper Tube

ASTM B 75

Specification for Seamless Copper Water Tube ASTM B 88

Requirements for Wrought Seamless Copper and Copper-Alloy Tube ASTM B 251

10.1.1.2 Steel Pipe. Steel piping shall not be used for general underground service unless* Piping specifically listed for such serviceuse in private fire service mains shall be permitted to be used.

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10.1.3 Steel Pipe Used with Fire Department Connections.1.2.1 Where listed pipe is used, it shall be installed in accordance with the listing limitations including installation instructions.

10.1.1.2.2 Where listing limitations or installation instructions differ from the requirements of this standard, the listing limitations and installation instructions shall apply.

10.1.1.3 Steel piping manufactured in accordance with Table 10.1.1.3 that is externally coated and wrapped and internally galvanized, steel pipe shall be permitted to be used between the check valve and the outside hose coupling for(s) on the fire department connection and the check valve installed in the fire department connection piping.

10.1.4* Pipe Type and Class. The type and class of pipe for a particular underground installation shall be determined through consideration of the following factors:

(1) Fire resistance of the pipe

(2) Maximum system working pressure

(3) Depth at which the pipe is to be installed

(4) Soil conditions

(5) Corrosion

(6) Susceptibility of pipe to other external loads, including earth loads, installation beneath buildings, and traffic or vehicle loads

10.1.5* Working Pressure. Piping, fittings, and other system components

Table 10.1.1.3 Steel Piping for Fire Department Connections

Materials and Dimensions Standard Specificationfor Blackand ASTMA795 Specification for Black and ASTM A 795 Hot-DippedZincDipped Zinc-Coated (Galvanized)WeldedandSeamlessSteelPipeforFireProtectionUse Welded and Seamless Steel Pipe for Fire Protection Use SpecificationforPipe,Specification for Pipe, Steel, Black ANSI/ASTMA53ASTM A 53 andHotand Hot-Dipped, Zinc-Coated, Welded andSeamlessand Seamless Wrought Steel Pipe SpecificationforElectricSpecification for Electric-Resistance ANSI/ASMEB 3 6 ASME B 3 6 . 1 0 M - ASTMA - ASTM A 135 Welded Steel Pipe

10.1.1.3.1 External coating and wrapping as required by 10.1.1.3 shall be approved.

10.1.2 All piping used in private fire service mains shall be rated for the maximum system working pressure to which they arethe piping is exposed to but shall not be rated at less than 150 psi (10 bar).

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10.1.6* Lining of Buried Pipe.

10.1.6.1 Unless the requirements of 10.1.6.2 are met, all ferrous metal pipe shall be lined in accordance with the applicable standards in Table 10.1.1.

10.1.6.2 Steel pipe utilized in fire department connections and protected in accordance with the requirements of 10.1.3 shall not be required to be internally lined.

10.2 Fittings.

10.2.1* Buried Fittings. Fittings shall be of an approved type with joints and pressure class ratings compatible with the pipe used.

10.2.2 Standard Fittings.

10.2.2.1 Fittings shall meet the standards in Table 10.2.2.110.1.3 When lined piping is used, the manufacturer’s literature for internal diameter shall be used for all hydraulic calculations.

10.1.4 Where piping installed in a private fire service main must be installed above grade, the piping materials shall conform to NFPA 13 Standard for the Installation of Sprinkler Systems.

10.1.4.1 Underground piping shall be permitted to extend into the building through the slab or wall not more than 24 in. (0.6 m).

10.2 Fittings.

10.2.1 All fittings used in private fire service mains shall be in accordance with 10.2.3.10.2.1.1, 10.2.1.2 or 10.2.1.3

10.2.1.1 Fittings manufactured in accordance with Table 10.2.1.1 shall be permitted to be used.

Table 10.2.2.1 Fittings Materials and Dimensions


Cast Iron

Gray Iron Threaded Fittings, Classes 125 and 250 ASME B16.4

Gray Iron Pipe Flanges and Flanged Fittings, Classes 1225, 125, and 250

Ductile Iron

Ductile Iron and Gray Iron Fittings , 3 in. Through 48 in., for Water and other Liquids

AWWAC110AWWA C110

Ductile Iron Compact Fittings , 3 in. Through 24 in. and 54 in. through 64

AWWAC153AWWA C153

ASME B16.1

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in. for Water Service

Malleable Iron

Malleable Iron Threaded Fittings, Class 150 and 300 ASME B16.3

Steel

Factory-Made Wrought Steel Buttweld Fittings ASME B16.9

Buttwelding Ends ASME B16.25

Specification for Piping Fittings of Wrought Carbon Steel and Alloy Steel for Moderate and Elevated Temperatures

ASTM A 234

Pipe Flanges and Flanged Fittings, NPS ½ Through 24 ASME B16.5

Forged Steel Fittings, Socket Welded and Threaded ASME B16.11

Steel Pipe Flanges for Waterworks Service — Sizes 4 in. Through 144 in.

AWWA C207

Dimensions for Fabricated Steel Water Pipe Fittings AWWA C208

Copper

Wrought Copper and Bronze Solder Joint Pressure Fittings ASME B16.22

Cast Bronze Solder Joint Pressure Fittings ASME B16.18

Bronze Fittings

Cast Bronze Threaded Fittings ASTM B16.15

10.2.2.2 In addition to the standards in Table 10.2.2.2, CPVC fittings shall also be in accordance with 10.2.3 and with the portions of the ASTM standards specified in Table 10.2.2.2 that apply to fire protection service.

Table 10.2.2.2 Specially Listed Fittings Materials and Dimensions


Chlorinated Polyvinyl Chloride (CPVC) Specification for Schedule 80 CPVC Threaded Fittings

ASTM F 437

Specification for Schedule 40 CPVC Socket-Type Fittings ASTM F 438

Specification for Schedule 80 CPVC Socket-Type Fittings ASTM F 439

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10.2.3 Special Listed Fittings. Other types of fittings investigated for suitability in automatic sprinkler installations and listed for this service, including, but not limited to, polybutylene, CPVC, and steel differing from that provided in Table 10.2.2.1, shall be permitted when 10.2.1.2 Fittings specifically listed for use in private fire service mains shall be permitted to be used.

10.2.1.2.1 Where listed fittings are used, they shall be installed in accordance with their listing limitations, including installation instructions.

10.2.4 Pressure Limits. Listed1.2.2 Where listing limitations or installation instructions differ from the requirements of this standard, the listing limitations and installation instructions shall apply.

10.2.1.3 Approved fittings shall be permitted for the system pressures as specified in their listings, but notto be used.

10.2.2 All fittings used in private fire service mains shall be rated for the maximum system working pressure to which the fittings ares exposed to but shall not be rated at less than 150 psi (10 bar).

10.2.3 Where fittings installed in a private fire service main must be installed above grade, the fittings shall conform to NFPA 13 Standard for the Installation of Sprinkler Systems.

10.2.3.1 Fittings in accordance with 10.2.1 shall be permitted for the transition to the above ground piping or fittings.

10.3 JoiningConnection of Pipe and ,Fittings and Appurtenances.

10.3.1* Buried Joints. Joints shall be approved.

Connection of all fittings and appurtenances to piping shall be in accordance with 10.3.2 Threaded Pipe and Fittings. All threaded steel10.3.2 Connections of pipe and fittings shall haveindicated in Tables 10.1.1.1 and 10.2.1.1 shall be in accordance with the referenced standard in the Table.

10.3.3 Listed Connections. Connections utilizing listed products shall be in accordance with the listing limitations and the manufacturer’s installation instructions.

10.3.3.1 Where listing limitations or installation instructions differ from the requirements of this standard, the listing limitations and installation instructions shall apply.

10.3.4 Where pipe, fittings or appurtenances are connected using threads cut, all threads shall be in accordance with ANSI/ASME B1.20.1.

10.3.3* Groove Joining Methods. Pipes10.3.5 Grooved Connections. Where pipe, fittings or appurtenances are connected using grooves, they shall be connected in accordance with 10.3.5.1 through 10.3.5.3.

10.3.5.1 Pipe, fittings, and appurtenances to be joined with grooved couplings shall contain cut, rolled, or cast grooves that are dimensionally compatible with the couplings.

10.3.5.2 Pipe, fittings, and appurtenances that are connected with grooved couplings and are part of a listed assembly shall be permitted to be used.

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10.3.5.3 Pipe joined with grooved fittings shall be joined by a listed combination of fittings, gaskets, and grooves.

10.3.4 Brazed and Pressure Fitting Methods. Joints10.3.6All joints for the connection of copper tube shall be brazed or joined using pressure fittings as specified in Table 10.2.2.1.

10.3.5 Other Joining Methods. Other joining methods listed for this service shall be permitted where installed in accordance with their listing limitations.

10.4 Protection of Private Fire Service Mains

10.3.6 Pipe Joint Assembly.

10.3.64.1 Joints shall be assembled by persons familiar with the particular materials being used and in accordance with the manufacturer's instructions and specifications. Protection from Corrosion

10.3.6.2*4.1.1 Coatings. All bolted joint accessories shall be cleaned and thoroughly coated with asphalt or other corrosion-retarding material after installation.

10.4 Depth of Cover.

10.4.1* The depth of cover over water pipes shall be determined by the maximum depth of frost penetration in the locality where the pipe is laid.

10.4.2 The top of the pipe shall be buried not less than 1 ft (0.3 m) below the frost line for the locality.

10.4.3 In those locations where frost is not a factor, the depth of cover shall be not less than 2½ ft (0.8 m) to prevent mechanical damage.

10.4.4 Pipe under driveways shall be buried at a minimum depth of 3 ft (0.9 m).

10.4.5 Pipe under railroad tracks shall be buried at a minimum depth of 4 ft (1.2 m).

10.4.6 The depth of cover shall be measured from the top of the pipe to finished grade, and due consideration shall always be given to future or final grade and nature of soil.

10.5 Protection Against Freezing.

10.5.1* Where it is impracticable to bury pipe, pipe shall be permitted to be laid aboveground, provided that the pipe is protected against freezing and mechanical damage.

10.5.2 Pipe shall be buried below the frost line where entering streams and other bodies of water.

10.5.3 Where pipe is laid in water raceways or shallow streams, care shall be taken that there will be sufficient depth of running water between the pipe and the frost line during all seasons of frost; a safer method is to bury the pipe 1 ft (0.3 m) or more under the bed of the waterway.

10.5.4 Pipe shall be located at a distance from stream banks and embankment walls that prevents danger of freezing through the side of the bank.

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10.6 Protection Against Damage.

10.6.1 Pipe shall not be run under the building except where permitted in 10.6.2 and 10.6.3.

10.6.2 Where approved, pipe shall be permitted to be run under buildings, and special precautions shall be taken, including the following:

(1) Arching the foundation walls over the pipe

(2) Running pipe in covered trenches

(3) Providing valves to isolate sections of pipe under buildings

10.6.3 Fire service mains shall be permitted to enter the building adjacent to the foundation.

10.6.3.1* The.1.2The requirements of 10.6.2(2) and 10.6.2(3)10.4.1.1 shall not apply where fire service mains enter under the building no more than 10 ft (3 m) as measured from the outside edge of the building to the center of the vertical pipeto epoxy coated fittings, valves, glands or other accessories.

10.6.4.1.3* Pipe joints shall not be located under foundation footings.

10.6.5* Piping shall be run at least 1 ft (305 mm) below the bottom of foundations/footers.

10.6.5.1 The requirements of 10.6.6 shall not apply when piping is sleeved.

10.6.6 Mains shall be subjected to an evaluation of the following specific loading conditions and protected, if necessary:

(1) Mains running under railroads carrying heavy cargo

(2) Mains running under large piles of heavy commodities

(3) Mains located in areas that subject the main to heavy shock and vibrations

10.6.7* Where it is necessary to join metal pipe with pipe of dissimilar metal, the joint shall be insulated against the passage of an electric current using an approved method.

10.4.2 Protection of Piping.10.6.8*10.4.2.1 Protection from Freezing.* The depth of cover for private fire service mains and their appurtenances to protect against freezingshall be in accordance with 10.4.2.

10.4.2.1.1 The top of the pipe shall be buried not less than 1 ft (0.3 m) below the frost line for the locality.

10.4.2.1.2 The depth of piping shall be measured from the top of the piping to the final grade.

10.4.2.1.3 Where listed piping is used and the bury depth differs from this standard, the listing limitations shall apply.




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10.4.2. 1.4 Where private fire service mains are installed above ground, they shall be protected from freezing in accordance with NFPA 13 Standard for the Installation of Sprinkler Systems.

10.4.2.1.5 Private fire service mains installed in water raceways or shallow streams shall be installed so that the piping will remain in the running water throughout the year.

10.4.2.1.6 Where piping is installed adjacent to a vertical face, it shall be installed from the vertical face at the same distance as if the piping were buried.

10.4.2.1.7 Protection of private fire service mains from freezing using heat tracing shall be permitted when the heat tracing is specifically listed for underground use.

10.4.2.1.7.1 Heat tracing not listed for underground use shall be permitted when piping is installed in accordance with 10.4.2.5.

10.4.2.2 Protection From Mechanical Damage. The depth of cover for private fire service mains and their appurtenances to protect against mechanical damage shall be in accordance with 10.4.2.3.

10.4.2.1. The depth of piping shall be measured from the top of the piping to the final grade.

10.4.2.2 In locations where freezing is not a factor, the depth of cover shall not be less than 30 in. (0.8 m) below grade to prevent mechanical damage.

10.4.2.2.1 Where listed piping is used and the bury depth differs from this standard, the listing limitations shall apply.

10.4.2.3 Private fire service mains installed under driveways or roadways shall be buried at a minimum depth of 3 ft (0.9 m).

10.4.2.3.1 Sidewalks, walkways and other paved or concrete pedestrian passageways shall not be required to comply with 10.4.2.3.

10.4.2.4 Private fire service mains installed under railroad tracks shall be buried at a minimum depth of 4 ft (1.2 m).

10.4.2.4.1 Where railroad operators require a greater depth of bury, the greater depth shall apply.

10.4.2.5 Private fire service mains installed under large piles of heavy commodities or subject to heavy shock and vibrations shall be buried at a minimum depth of 4 ft (1.2 m).

10.4.2.6 Where private fire service mains are installed above ground, they shall be protected with bollards or other means as approved by the AHJ when subject to mechanical damage.

10.4.3 Private Fire Service Mains Under Buildings. Except as allowed by 10.4.3, private fire service mains shall not be allowed to run under buildings.


10.4.3.1* Private fire service mains supplying fire protection systems within the building shall be permitted to extend no more than 10 ft (3 m), as measured from the outside of the building, under the building to the riser location.

10.4.3.1.1* Pipe joints shall not be located directly under foundation fittings.

10.4.3.1.2* Piping shall be installed a minimum of 12 in. (305 mm) below the bottom of building foundations or footers.

10.4.3.1.2.1 The requirements of 10.4.3.1.2 shall not apply when the piping is sleeved with an approved material.

10.4.3.2 Where approved, private fire service mains supplying systems within the building shall be permitted to extend more than 10 ft (3 m) under the building when all the requirements of 10.4.3.2.1, through 10.4.3.2.4 are met.

A.10.4.3.2 The design concepts in 10.4.3.2.1 through 10.4.3.2.4 should apply to both new installations and existing private fire service mains approved to remain under new buildings.

10.4.3.2.1 Where the piping is installed under the building, all foundations or footers over the private fire service main shall be arched to create a minimum of 24 in (610 mm) clearance.

10.4.3.2.2 It shall be acceptable to install the piping in covered trenches where the trenches are accessible from within the building.

10.4.3.2.3 All joints shall be mechanically restrained.

10.4.3.2.4 A valve shall be installed before the piping enters under the building and within 24 in. (610 mm) of where the piping enters the building.


10.5 Grounding and Bonding

10.5.1* In no case shall the underground piping be used as a grounding electrode for electrical systems.

10.6.85.1.1* The requirement of 10.6.8 shall not preclude the bonding of the underground piping to the lightning protection grounding system as required by NFPA 780 in those cases where lightning protection is provided for the structure.

10.7 Requirement for Laying Pipe.

10.7.1 Pipes, valves, hydrants, gaskets, and fittings shall be inspected for damage when received and shall be inspected prior to installation. (See Figure 10.10.1.)

10.7.2 The torquing of bolted joints shall be checked.

10.7.3 Pipe, valves, hydrants, and fittings shall be clean inside.

10.7.4 When work is stopped, the open ends of pipe, valves, hydrants, and fittings shall be plugged to prevent stones and foreign materials from entering.

10.7.5 All pipe, fittings, valves, and hydrants shall be carefully lowered into the trench using appropriate equipment and carefully examined for cracks or other defects while suspended above the trench.

10.7.6 Plain ends shall be inspected for signs of damage prior to installation.

10.7.7 Under no circumstances shall water main materials be dropped or dumped.

10.7.8 Pipe shall not be rolled or skidded against other pipe materials.

10.7.9 Pipes shall bear throughout their full length and shall not be supported by the bell ends only or by blocks.

10.7.10 If the ground is soft or of a quicksand nature, special provisions shall be made for supporting pipe.

10.7.11 Valves and fittings used with nonmetallic pipe shall be supported and restrained in accordance with the manufacturer's specifications.

10.8 Joint * Restraint.

10.8.1 General.

10.8.1.1* All tees, plugs, caps, bends, reducers, valves, and hydrant branches shall be Private fire service mains shall be restrained against movement by using thrust blocks in accordance with 10.8.2 or restrained joint systems in accordance with 10.8.3.

10.8.1.2* Piping with fused, threaded, grooved, or welded joints shall not require additional restraining, provided that such joints can pass the hydrostatic test of 10.10.2.2 without shifting of piping or leakage in excess of permitted amounts.

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10.8.1.3 Steep Grades. On steep grades, mains shall be additionally restrained to prevent slipping.

10.8.1.3.1 Pipe shall be restrained at the bottom of a hill and at any turns (lateral or vertical).

10.8.1.3.2 The restraint specified in changes in direction in accordance with 10.6.1, 10.6.2 or 10.6.310.86.1.3.1* shall be to natural rock or to suitable piers built on the downhill side of the bell.

10.8.1.3.3 Bell ends shall be installed facing uphill.

10.8.1.3.4 Straight runs on hills shall be restrained as determined by the design engineer.

10.8.2* Thrust Blocks.

10.8.26.1 .1 Thrust blocks shall be considered satisfactory permitted where soil is suitable for their usestable and capable of resisting the anticipated thrust forces.

10.86.1.2.2 Thrust blocks shall be of a concrete, of a mix not leaner than one part cement, two and one-half parts sand, and five parts stone.

10.8.26.1.3 Thrust blocks shall be placed between undisturbed earth and the fitting to be restrained and shall be capable of resisting the calculated thrust forces.

10.8.2.4 6.14 Wherever possible, thrust blocks shall be placed solocatedso that the joints are accessible for repair.

10.8.36.2* Restrained Joint Systems. FirePrivate fireservicef service mains utilizing restrained joint systems shall include one or more of the following:

(1) Locking mechanical or push-on joints

(2) Mechanical joints utilizing setscrew retainer glands

(3) Bolted flange joints

(4) Heat-fused or welded joints

(5) Pipe clamps and tie rods

(6) Threaded or grooved joints

(7 (5) Other approved methods or devices

10.8.36.2.1 Sizing Clamps, Rods, Bolts, and Washers.

10.8.36.2.1.1 Clamps.

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10.8.36.2.1.1.1 Clamps shall have the following dimensions:

(1) ½ in. × 2 in. (12.7 mm × 50.8 mm) for 4 in. (102 mm) to 6 in. (152 mm) pipe

(2) 5⁄8 in. × 2½ in. (15.9 mm × 63.5 mm) for 8 in. (204 mm) to 10 in. (254 mm) pipe

(3) 5⁄8 in. × 3 in. (15.9 mm × 76.2 mm) for 12 in. (305 mm) pipe

10.8.36.2.1.1.2 The diameter of a bolt hole shall be 1⁄168 in. (1.63.2 mm) larger than that of the corresponding bolt.

10.8.36.2.1.2 Rods.

10.8.36.2.1.2.1.2.1 Rods shall be not less than 5⁄8 in. (15.9 mm) in diameter.

10.8.36.2.1.2.2 Table 10.8.36.2.1.2.2 provides the numbers of various diameter rods that shall be used for a given pipe size.

Table 10.8.36.2.1.2.2 Rod Number — Diameter Combinations

Nominal Pipe Size

(in.)

5⁄8 in.

(15.9 mm) ¾ in.

(19.1 mm)

7⁄8 in.

(22.2 mm) 1 in.

(25.4 mm)

4 2 — — —

6 2 — — —

8 3 2 — —

10 4 3 2 —

12 6 4 3 2

14 8 5 4 3

16 10 7 5 4

Note: This table has been derived using pressure of 225 psi (15.5 bar) and design stress of 25,000 psi (172.4 MPa).

10.8.36.2.1.2.3 Where using bolting rods, the diameter of mechanical joint bolts shall limit the diameter of rods to ¾ in. (19.1 mm).

10.8.36.2.1.2.4 Threaded sections of rods shall not be formed or bent.

10.8.36.2.1.2.5 Where using clamps, rods shall be used in pairs for each clamp.

10.8.36.2.1.2.6 Assemblies in which a restraint is made by means of two clamps canted on the barrel of the pipe shall be permitted to use one rod per clamp if approved for the specific installation by the authority having jurisdiction.

10.8.3.16.2.1.2.7 Where using combinations of rods, the rods shall be symmetrically spaced.

10.8.36.2.1.3 Clamp Bolts. Clamp bolts shall have the following diameters:


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(1) 5⁄8 in. (15.9 mm) for pipe 4 in. (102 mm), 6 in. (152 mm), and 8 in. (204 mm)

(2) ¾ in. (19.1 mm) for 10 in. (254 mm) pipe

(3) 7⁄8 in. (22.2 mm) for 12 in. (305 mm) pipe

10.8.36.2.1.4 Washers.

10.8.36.2.1.4.1 Washers shall be permitted to be cast iron or steel and round or square.

10.8.36.2.1.4.2 Cast iron washers shall have the following dimensions:

(1) 5⁄8 in. × 3 in. (15.9 mm × 76.2 mm) for 4 in. (102 mm), 6 in. (152 mm), 8 in. (204 mm), and 10 in. (254 mm) pipe

(2) ¾ in. × 3½ in. (19.1 mm × 88.9 mm) for 12 in. (305 mm) pipe

10.8.36.2.1.4.3 Steel washers shall have the following dimensions:

(1) ½ in. × 3 in. (12.7 mm × 76.2 mm) for 4 in. (102 mm), 6 in. (152 mm), 8 in. (204 mm), and 10 in. (254 mm) pipe

(2) ½ in. × 3½ in. (12.7 mm × 88.9 mm) for 12 in. (305 mm) pipe

10.8.36.2.1.4.4 The diameter of holes shall be 1⁄8 in. (3.2 mm) larger than that of bolts or rods.

10.8.36.2.2 Sizes of Restraint Straps for Tees.

10.8.36.2.2.1 Restraint straps for tees shall have the following dimensions:

(1) 5⁄8 in. (15.9 mm) thick and 2½ in. (63.5 mm) wide for 4 in. (102 mm), 6 in. (152 mm), 8 in. (204 mm), and 10 in. (254 mm) pipe

(2) 5⁄8 in. (15.9 mm) thick and 3 in. (76.2 mm) wide for 12 in. (305 mm) pipe

10.8.36.2.2 .2 The diameter of rod holes shall be 1⁄16 in. (1.6 mm) larger than that of rods.

10.8.36.2.2.3 Figure 10.8.36.2.2.3 and Table 10.8.36.2.2.3 shall be used in sizing the restraint straps for both mechanical and push-on joint tee fittings.

****INSERT FIGURE HERE****

FIGURE 10.8.36.2.2.3 Restraint Straps for Tees.

Table 10.8.36.2.2.3 Restraint Straps for Tees

Nominal Pipe Size

(in.)

A B C D

in. mm in. mm in. mm in. mm



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4 12½ 318 101⁄8 257 2½ 64 1¾ 44

6 14½ 368 121⁄8 308 39⁄16 90 213⁄16 71

8 16¾ 425 143⁄8 365 421⁄32 118 329⁄32 99

10 191⁄16 484 1611⁄16 424 5¾ 146 5 127

12 225⁄16 567 193⁄16 487 6¾ 171 57⁄8 149

10.8.36.2.3 Sizes of Plug Strap for Bell End of Pipe.

10.8.36.2.3.1 The strap shall be ¾ in. (19.1 mm) thick and 2½ in. (63.5 mm) wide.

10.86.2.3.3.2 The strap length shall be the same as dimension A for tee straps as shown in Figure 10.8.36.2.2.3.

10.86.2.3.3.3 The distance between the centers of rod holes shall be the same as dimension B for tee straps as shown in Figure 10.8.36.2.2.3.

10.8.36.2.4 * Material. Clamps, rods, rod couplings or turnbuckles, bolts, washers, restraint straps, and plug straps shall be of a material that has physical and chemical characteristics that indicate its deterioration under stress can be predicted with reliability.

10.8.36.2.5* Corrosion Resistance. After installation, rods, nuts, bolts, washers, clamps, and other restraining devices shall be cleaned and thoroughly coated with a bituminous or other acceptable corrosion-retarding material.

10.6.2.5.1 The requirements of 10.6.2.5 shall not apply to epoxy coated fittings, valves, glands or other accessories.

10.6.3* Private fire service mains utilizing one or more of the following connection methods shall not require additional restraint , provided that such joints can pass the hydrostatic test of 10.10.2.2 without shifting of piping.

(1) Threaded Connections

(2) Grooved Connections

(3) Welded Connections

(4) Heat Fused Connections

(5) Chemical or Solvent Cemented Connections

10.7 Steep Grades.

10.7.1On1 steep grades, mains shall be additionally restrained to prevent slipping.

10.7.1.1 Pipe shall be restrained at the bottom of a hill and at any turns (lateral or vertical).


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10.7.1.1.1 The restraint specified in 10.7.1.1 shall be to natural rock or to suitable piers built on the downhill side of the bell.

10.7.1.2 Bell ends shall be installed facing uphill.

10.7.1.3 Straight runs on hills shall be restrained as determined by a design professional.

10.8 Installation Requirements.

10.8.1 Piping, valves, hydrants, gaskets, and fittings shall be inspected for damage when received and shall be inspected prior to installation.

10.8.2 The tightness of bolted joints shall be verified by the bolt torque or by the method described in the listing information or manufacturer’s installation instructions..

10.8.3 Pipe, valves, hydrants, and fittings shall be clean and free from internal debris.

10.8.4 When work is stopped, the open ends of piping, valves, hydrants, and fittings shall be plugged or covered to prevent foreign materials from entering.

10.8.5 All piping, fittings, valves, and hydrants shall be examined for cracks or other defects while suspended above the trench and lowered into the trench using appropriate equipment.

10.8.6 Plain ends shall be inspected for signs of damage prior to installation.

10.8.7 Piping, fittings, valves, hydrants and appurtenances shall not be dropped, dumped or rolled or skidded against other materials.

10.8.8 Pipes shall be supported in the trench throughout their full length and shall not be supported by the bell ends only or by blocks.

10.8.9 If the ground is soft, other means shall be provided to support the pipe.

10.8.10 Valves and fittings used with nonmetallic pipe shall be supported and restrained in accordance with the manufacturer's installation instructions.

10.9 Backfilling.

10.9.1 Backfill material shall be tamped in layers or puddled under and around pipes to prevent settlement or lateral movement and shall contain no ashes, cinders, refuse, organic matter, or other corrosive materials.

10.9.2 Backfill material shall not contain ash, cinders, refuse, organic matter or other corrosive materials.

10.9.3 Rocks shall not be placed in trenchesused for backfill.

10.9.3 4 Frozen earth shall not be used for backfillingas backfill material.

10.9.4 5 In trenches cut through rock, tamped backfill shall be used for at least 6 in. (150 mm) under and around the pipe and for at least 2 ft (0.6 m) above the pipe.










10.10 Testing10.9.6 Where using piping listed for private fire service mains, the manufacturer’s installation instructions for backfill shall be followed.

10.10Testing and Acceptance.

10.10.1 Approval of Underground Piping. The installing contractor shall be responsible for the following:

(1) Notifying the authority having jurisdiction and the owner's representative of the time and date testing is to be performed

(2) Performing all required acceptance tests

(3) Completing and signing the contractor's material and test certificate(s) shown in Figure 10.10.1


FIGURE 10.10.1 Sample of Contractor's Material and Test Certificate for Underground Piping.


FIGURE 10.10.1 Continued

10.10.2 Acceptance Requirements.

10.10.2.1* Flushing of Piping.

10.10.2.1.1 Underground piping, from the water supply to the system riser, and lead-in connections to the system riser, including all hydrants, shall be completely flushed before the connection is made to downstream fire protection system piping.

10.10.2.1.2 The flushing operation shall be continued for a sufficient timecontinue until water flow is verified to ensure thorough cleaning.be clear of debris. 10.10.2.1.3 The minimum rate of flow shall be not less than one of the following: (1) ) Hydraulically calculated water demand flow rate of the system, including any hose requirements (2)* (2)* Flow in accordance with Table 10.10.2.1.3Table 10.10.2.1.3

(3) ) Maximum flow rate available to the system under fire conditions

Table 10.10.2.1.3 Flow Required to Produce Velocity of 10 ft/sec (3 m/sec) in Pipes

Nominal Pipe Size Flow Rate

in. mm gpm L/min

2 51 100 379

2 ½ 63 150 568


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3 76 220 833

4 102 390 1,476

5 127 610 2,309

6 152 880 3,331

8 204 1,560 5,905

10 254 2,440 9,235

12 305 3,520 13,323

10.10.2.1.4 Provision shall be made for the proper disposal of water used for flushing or testing.

10.10.2.2 Hydrostatic Test.

10.10.2.2.1* All piping and attached appurtenances subjected to system working pressure shall be hydrostatically tested at 200 psipsig (13.8 bar) or 50 psi (3.5 bar) in excess of the system working pressure, whichever is greater, and shall maintain that pressure at ±5 psipsig (0.35 bar) for 2 hours.

10.10.2.2.2 Pressure loss Acceptable test results shall be determined by indication of either a drop in gauge pressure loss less than 5 psig or by no visual leakage.

10.10.2.2.3 The test pressure shall be read from one of the following, located at the lowest elevation of the system or the portion of the system being tested:

(1) A gauge located at one of the hydrant outlets

(2) A gauge located at the lowest point where no hydrants are provided

10.10.2.2.4* The trench shall be backfilled between joints before testing to prevent movement of pipe.

10.10.2.2.5 Where required for safety measures presented by the hazards of open trenches, the pipe and joints shall be permitted to be backfilled, provided the installing contractor takes the responsibility for locating and correcting leakage.

10.10.2.2.6* Hydrostatic Testing Allowance. Where additional water is added to the system to maintain the test pressures required by 10.10.2.2.1, the amount of water shall be measured and shall not exceed the limits of Table 10.10.2.2.6, which are based upon the following equations: U.S. Customary Units:

[10.10.2.2.6(a)]

where: L = testing allowance (makeup water) [gph (gal/hr)]


S = length of pipe tested (ft) D = nominal diameter of pipe (in.) P = average test pressure during hydrostatic test (gauge psi)

Metric Units:

[10.10.2.2.6(b)]

where: L = testing allowance (makeup water) (L/hr) S = length of pipe tested (m) D = nominal diameter of pipe (mm) P = average test pressure during hydrostatic test (kPa)

Table 10.10.2.2.6 Hydrostatic Testing Allowance at 200 psi (gph/100 ft of Pipe)

Nominal Pipe Diameter

(in.) Testing Allowance

2 0.019

4 0.038

6 0.057

8 0.076

10 0.096

12 0.115

14 0.134

16 0.153

18 0.172

20 0.191

24 0.229

Notes:

(1) For other length, diameters, and pressures, utilize Equation 10.10.2.2.6(a) or 10.10.2.2.6(b) to determine the appropriate testing allowance.

(2) For test sections that contain various sizes and sections of pipe, the testing allowance is the sum of the testing allowances for each size and section.

10.10.2.3 Other Means of Hydrostatic Tests. Where required by the authority having jurisdiction, hydrostatic tests shall be permitted to be completed in accordance with the requirements of AWWA C600, AWWA C602, AWWA C603, and AWWA C900.

10.10.2.4 Operating Test.


10.10.2.4.1 Each hydrant shall be fully opened and closed under system water pressure.

10.10.2.4.2 Dry barrel hydrants shall be checked for proper drainage.

10.10.2.4.3 All control valves shall be fully closed and opened under system water pressure to ensure proper operation.

10.10.2.4.4 Where fire pumps are availablesupply the private fire service main , the operating tests required by 10.10.2.4 shall be completed with the pumps running.

10.10.2.5 Backflow Prevention Assemblies.

10.10.2.5.1 The backflow prevention assembly shall be forward flow tested to ensure proper operation.

10.10.2.5.2 The minimum flow rate tested in 10.10.2.5.1 shall be the system demand, including hose stream demand where applicable.


Formatted: div6


6.3.6 Brass Pipe,

6.3.7 Stainless Steel

6.3.8 Metallic Pipe and Tube bending

6.3.9 Non-Metallic Pipe

6.3.10 Listed Pipe and Tubing

6.3.11 Pipe and Tubing Identification




Street Address:

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Zip:

Submittal Date: Tue Aug 20 12:05:18 EDT 2013

Committee Statement

CommitteeStatement:

Section 6.3.6 through 6.3.11 should be renumbered as proposed. The technical changes made tothese sections via other First Revisions should be incorporated into the First Draft. This is strictlya restructuring of 6.3.6 for clarity.

ResponseMessage:




16 of 474 11/7/2013 12:33 PM


Replace the word "small room" with "small compartment" in the following sections:

8.15.1.2.9

11.2.3.1.4(4)(g)

12.9.2(7)

23.4.4.6.2

Table 23.4.4.6.2

A.23.4.4.6.2




Street Address:

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Zip:

Submittal Date: Wed Aug 21 15:12:03 EDT 2013

Committee Statement

CommitteeStatement:

There was confusion regarding the use of the terms small room and small compartment. ThisGlobal revision, in conjunction with FR-95 replaces the incorrect usage of the term small room byreplacing it with small compartment.

ResponseMessage:


17 of 474 11/7/2013 12:33 PM

First Revision No. 72-NFPA 13-2013 [ Section No. 1.2.2 ]

1.2.2

Sprinkler systems and private fire service mains are specialized fire protection systems and shall requiredesign and installation by knowledgeable and experienced design and installation personnel .




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Committee Statement

Committee Statement: The revisions were made to make the section grammatically correct.

Response Message:



18 of 474 11/7/2013 12:33 PM


2.3.2 ASCE Publications.

American Society of Civil Engineers, 1801 Alexander Bell Drive, Reston, VA 20191-4400.

SEI/ASCE 7, Minimum Design Loads of Buildings and Other Structures,2005 2010 .




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Committee Statement

Committee Statement: Updated to reference the current edition of ASCE 7(2010).

Response Message:



19 of 474 11/7/2013 12:33 PM


2.3.4 ASTM Publications.

ASTM International, 100 Barr Harbor Drive, P.O. Box C700, West Conshohocken, PA 19428-2959.

ANSI/ASTM A 53, Standard Specification for Pipe, Steel, Black and Hot-Dipped, Zinc-Coated, Welded andSeamless, 2001.

ASTM A 106, Standard Specification for Seamless Carbon Steel Pipe for High Temperature Service, 2008.

ASTM A 135, Standard Specification for Electric-Resistance-Welded Steel Pipe, 2001.

ASTM A 153A/153M, Standard Specification for Zinc Coating (Hot Dip) on Iron and Steel Hardware, 2004.

ASTM A 234, Standard Specification for Piping Fittings of Wrought-Carbon Steel and Alloy Steel for Moderateand High Temperature Service, 2001.

ASTM A 795, Standard Specification for Black and Hot-Dipped Zinc-Coated (Galvanized) Welded andSeamless Steel Pipe for Fire Protection Use, 2000.

ASTM B 16.15, Cast Bronze Threaded Fittings, 1985.

ASTM B 32, Standard Specification for Solder Metal, 2000.

ASTM B 43, Specification for Seamless Red Brass Pipe, 2009.

ASTM B 75, Standard Specification for Seamless Copper Tube, 1999.

ASTM B 88, Standard Specification for Seamless Copper Water Tube, 1999.

ASTM B 251, Standard Specification for General Requirements for Wrought Seamless Copper andCopper-Alloy Tube, 1997.

ASTM B 446, Standard Specification for Nickel-Chromium-Molybdenum-Columbium Alloy (UNSN 06625) andNickel-Chromium-Molybdenum-Silicon Alloy (UNSN 06219) Rod and Bar, 2000.

ASTM B 813, Standard Specification for Liquid and Paste Fluxes for Soldering Applications of Copper andCopper-Alloy Tube, 2000.

ASTM B 828, Standard Practice for Making Capillary Joints by Soldering of Copper and Copper Alloy Tubeand Fittings, 2000.

ASTM C 635, Standard Specification for the Manufacture, Performance, and Testing of Metal SuspensionSystems for Acoustical Tile and Lay-In Panel Ceilings, 2004 2012 .

ASTM C 636, Standard Practice for Installation of Metal Ceiling Suspension Systems for Acoustical Tile andLay-In Panels, 2004 2008 .

ASTM E 84, Standard Test Method for Surface Burning Characteristics of Building Materials, 2010.

ASTM E 119, Standard Test Methods for Fire Tests of Building Construction and Materials, 2010.

ASTM E 136, Standard Test Method for Behavior of Materials in a Vertical Tube Furnace at 750°C, 1999.

ASTM F 437, Standard Specification for Threaded Chlorinated Poly (Vinyl Chloride) (CPVC) Plastic PipeFittings, Schedule 80, 1999.

ASTM F 438, Standard Specification for Socket-Type Chlorinated Poly (Vinyl Chloride) (CPVC) Plastic PipeFittings, Schedule 40, 2001.

ASTM F 439, Standard Specification for Socket-Type Chlorinated Poly (Vinyl Chloride) (CPVC) Plastic PipeFittings, Schedule 80, 2001.

ASTM F 442, Standard Specification for Chlorinated Poly (Vinyl Chloride) (CPVC) Plastic Pipe (SDR-PR),2009.

ASTM F 1121, Standard Specification for International Shore Connections for Marine Fire Applications, 1998.

ASTM SI 10, Standard for Use of the International System of Units (SI): The Modern Metric System, 1997.


National Fire Protection Association Report http://submittals.nfpa.org/TerraViewWeb/FormLaunch?id=/TerraView/C...

1 of 2 11/7/2013 12:43 PM



Street Address:City:State:Zip:Submittal Date: Wed Aug 21 09:14:51 EDT 2013

Committee Statement and Meeting Notes

Committee Statement: Updated to reference the current edition of ASTM C635 (2012) and ASTM C636 (2008).

Response Message:Public Input No. 432-NFPA 13-2013 [Section No. 2.3.4]


2 of 2 11/7/2013 12:43 PM

First Revision No. 76-NFPA 13-2013 [ New Section after 3.3.6 ]

3.3.7 Concealed Space.

That portion (s) of a building behind walls, over suspended ceilings, in pipe chases and attics, andwhose size might normally range from 1 in. (44.45 mm) stud spaces to 8 ft (2.44 m) interstitial trussspaces and that might contain combustible materials such as building structural members, thermaland/or electrical insulation, and ducting.




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Committee Statement

CommitteeStatement:

This term is used extensively throughout the document. Many AHJ's do not consider an attic aconcealed space because there may be scuttle holes which allow access. The document needs todefine the term. This definition comes from NFPA 96.

ResponseMessage:

Public Input No. 136-NFPA 13-2013 [New Section after 3.3.6]


23 of 474 11/7/2013 12:33 PM


3.3.8* Control Valve.

A valve controlling flow to water-based fire protection systems and devices .




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Committee Statement

Committee Statement: This definition was revised to correlate with the changes made to NFPA 24.

Response Message:


24 of 474 11/7/2013 12:33 PM


3.3.23* Sprinkler System.

A system that consists of an integrated network of piping designed in accordance with fire protectionengineering standards that includes a water supply source, a water control valve, a waterflow alarm, and adrain and is commonly activated by heat from a fire, discharging water over the fire area . The portion ofthe sprinkler system above ground is a network of specifically sized or hydraulically designed pipinginstalled in a building, structure, or area, generally overhead, and to which sprinklers are attached in asystematic pattern. The system is commonly activated by heat from a fire and discharges water over thefire area.




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Committee Statement

CommitteeStatement:

The deleted text is redundant to the last sentence in the definition. There is no technicalchange to this section, simply an editorial clean up.

ResponseMessage:



25 of 474 11/7/2013 12:33 PM

First Revision No. 79-NFPA 13-2013 [ Section No. 3.4.1.1 ]

3.4.1.1 Premixed Antifreeze Solution.

A mixture of an antifreeze material with water that is prepared and factory-mixed by the manufacturer witha quality control procedure in place that ensures that the antifreeze solution remains homogeneous andthat the concentration is as specified.




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Committee Statement

CommitteeStatement:

The term "at a factory" was removed since NFPA 25 2014 did not include this phrase since it isredundant with the term "factory mixed" which is already included in the definition.

ResponseMessage:



26 of 474 11/7/2013 12:33 PM


3.5.6 Extension Fitting.

A male by female adapter intended to be used with a sprinkler to adjust the final fit where the sprinkler isinstalled in a finished ceiling or wall.




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Submittal Date: Thu Sep 05 17:41:21 EDT 2013

Committee Statement

CommitteeStatement:

The use of sprinkler extension (cheater) nipples has become commonplace without regard forfriction loss or concern for the number of nipples used. During inspections and re-model work, Ihave witnessed as many as five extension nipples stacked at a single sprinkler. Installers should bere-cutting the drop nipple rather than stacking these un-listed sprinkler head extenders.

ResponseMessage:



27 of 474 11/7/2013 12:33 PM


3.5.9 Riser Nipple.

Vertical piece of A vertical pipe between the cross main and branch line.




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Committee Statement

CommitteeStatement:

Change language to maintain consistency with related definitions 3.5.5 Cross Mains and theuse of pipe or pipes rather than "piece of pipe."

ResponseMessage:



28 of 474 11/7/2013 12:33 PM

First Revision No. 81-NFPA 13-2013 [ New Section after 3.6.4.1 ]

3.6.4.1* Control Mode Density/Area (CMDA) Sprinkler.

A type of spray sprinkler intended to provide fire control in storage applications using the designdensity/area criteria described in this standard.



A3.6.4.1_FR81.1380549737714.docx edited version




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Committee Statement

CommitteeStatement:

A new definition and Annex material is necessary but needs to clarify that a listing is not required forall CMDA sprinklers for storage applications. These are just spray sprinklers used in storageoccupancy. They may or may not be listed specifically for storage however could be used in otherhazard classifications. Not all sprinklers used in the storage chapters have to be specially listed forstorage. The words “large water droplets” also adds confusion as a standard spray sprinkler is notconsidered “large drop” sprinklers. To include the words “large water droplets” additional technicaldata would need to be submitted.

ResponseMessage:

Public Input No. 457-NFPA 13-2013 [New Section after 3.6.4.1]


29 of 474 11/7/2013 12:33 PM

A.3.6.4.1

This definition is focused on the storage application since the term CMDA is used in the storage chapters. As indicated in Chapter 12, spray sprinklers intended for storage applications requiring a design density greater than 0.34 gpm/ft should have a nominal K-factor of 11.2 or larger and be listed for storage applications. Spray sprinklers having a nominal K-factor of 5.6 or 8.0 are permitted to be used for storage applications as a CMDA sprinkler within certain design densities as described in Chapter 12.

Spray type sprinklers intended for use in accordance with the occupancy hazard density/area curves could also be considered CMDA sprinklers. However, the CMDA terminology is generally not referenced in the non-storage chapters, and this term is not used to describe these sprinklers in the product listings.



3.7.2* Unobstructed Construction.

Construction where beams, trusses, or other members do not impede heat flow or water distribution in amanner that materially affects the ability of sprinklers to control or suppress a fire. Unobstructedconstruction has horizontal structural members that are not solid, where the openings are at least 70percent of the cross-section area and the depth of the member does not exceed the least dimension of theopenings, or all construction types, with the exception of panel construction, where the spacing ofstructural members exceeds 71⁄2 ft (2.3 m) on center.




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Committee Statement

CommitteeStatement:

A.3.7.1 (4) Panel Construction states "Beams spaced more than 7 1/2 ft (2.3 m) apart and framedinto girders qualify as panel construction, provided the 300 ft^2 (27.9 m^2) area limitation is met".Panel construction is considered an obstructed construction, therefore, paragraph A.3.7.1 (4)conflicts with paragraph 3.7.2 which states "...ALL CONSTRUCTION TYPES where the spacing ofstructural members exceeds 7 1/2 ft (2.3 m) on center". These two sections would no longer conflictwhen the words "except panel construction" are added as they appear in this first revision.

ResponseMessage:



30 of 474 11/7/2013 12:33 PM


3.9.1.1* Available Height for Storage.

The maximum height at which commodities can be stored above the floor and still maintain necessaryclearance from structural members and the required clearance below sprinklers.




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Committee Statement

CommitteeStatement:

This term is not used in the body of the text and chapter 3 definitions should not be provided for justannex material. The associated annex material is redundant and is more appropriately located anddiscussed in A.4.3. Since this is guidance for design professionals to consider future flexibility, it isreasonable to assume that they know it is possible for future use to be higher than possible initialuse and that the minimum clearance below sprinklers must be maintained, so no value is providedby this definition.

ResponseMessage:


Public Input No. 73-NFPA 13-2013 [Section No. A.3.9.1.1]


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3.9.1.17 Low-Piled Storage.

Solid-piled, palletized, rack storage, bin box, and shelf storage up to 12 ft (3.7 m) in height.



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Submittal Date: Mon Sep 30 11:12:35 EDT 2013

Committee Statement

CommitteeStatement:

This is just editorial to better reflect that chapter 13 is not just miscellaneous storage and to follow aformat more consistent with the rest of the storage chapters. The definition of low-piled storage doesnot address the height difference between Class I- IV and Group A plastic as is the current case forHigh-piled storage. Deleted the forward reference to chapters 14, 15, 16, and 17 since thosesections direct users back to chap 13. Deleted portions of 13.2.2 since it provides no deviation fromwhat’s allowed to be protected by the chapter in the current 13.2.1 so serves no purpose.

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3.9.3.2 Automotive Components on Portable Racks.

Automotive components on portable racks are defined as the following: instrument Instrument panels,windshields, metal and plastic gasoline tanks, heater housings, door panels, interior trim, bumper facia,wiring harnesses, sheet metal, body components, engines, driveline components, steering mechanisms,auxiliary motors, and lighting — all with or without expanded Group A plastic donnage dunnage . Thisdefinition does not include the storage of air bags, tires, and seats on portable racks.




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CommitteeStatement:

This proposal is offered to correct a typographical error in 3.9.3.2, and for clarity. As per 5.6.4.4, itis only Group A plastics that are subdivided into expanded or nonexpanded categories, but aswritten, the text of 3.9.3.2, 20.2 and A.20.2 appears to be referring to all plastic classes.

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First Revision No. 187-NFPA 13-2013 [ Section No. 3.9.3.7.9 ]

3.9.3.7.9 Solid Shelf Rack.

A rack that is not defined as an open rack where shelves are fixed in place with a solid, slatted, or wiremesh barrier used as the shelf material and having limited openings in the shelf area.




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CommitteeStatement:

This term is used in the standard to differentiate an open rack arrangment from a solid shelf rackarrangment, therefore the definition is needed. The definition of a solid shelf rack was clarified tomake the distinction between the two different rack configurations.

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3.9.3.8* Solid Shelving.

Global FR-239 Hide Deleted

Shelving that is fixed in place, slatted, wire mesh, or other type of shelves located within racks. The areaof a solid shelf is defined by perimeter aisle or flue space on all four sides or by the placement of loadsthat block openings that would otherwise serve as the required flue spaces . Solid shelves having an area

equal to or less than 20 ft 2 (1.9 m 2 ) are defined as open racks. Shelves of wire mesh, slats, or othermaterials more than 50 percent open and where the flue spaces are maintained are defined as openracks.




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Committee Statement

CommitteeStatement:

This revision is primarily editorial. It is intended to help clarify that the solid obstruction can also bethe load as currently portrayed only in the rack shelf area definition. One could contend that it’simplied by the wire mesh as a type of shelf but being explicit is warranted. It could also be arguedthat the definition on rack shelf area (3.9.3.7.6) addresses it but this phrase is not used anywhere inthe standard other than the definition. Text was copied from 3.9.3.7.6.

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First Revision No. 274-NFPA 13-2013 [ Section No. 5.6 ]

5.6* Commodity Classification.

See Section C.2.

5.6.1 General.

5.6.1.1* Classification of Commodities.

5.6.1.1.1

Commodity classification and the corresponding protection requirements shall be determined based onthe makeup of individual storage units (i.e., unit load, pallet load).

5.6.1.1.1.1

The type and amount of materials used as part of the product and its primary packaging as well as thestorage pallet shall be considered in the classification of the commodity.

5.6.1.1.2

When specific test data of commodity classification by a nationally recognized testing agency areavailable, the data shall be permitted to be used in determining classification of commodities.

5.6.1.2 Mixed Commodities.

5.6.1.2.1

Protection requirements shall not be based on the overall commodity mix in a fire area.

5.6.1.2.2

Unless the requirements of 5.6.1.2.3 or 5.6.1.2.4 are met, mixed commodity storage shall be protected bythe requirements for the highest classified commodity and storage arrangement.

5.6.1.2.3

The protection requirements for the lower commodity class shall be permitted to be utilized where all ofthe following are met:

(1) Up to 10 pallet loads of a higher hazard commodity, as described in 5.6.3 and 5.6.4, shall be

permitted to be present in an area not exceeding 40,000 ft2 (3716 m2).

(2) The higher hazard commodity shall be randomly dispersed with no adjacent loads in any direction(including diagonally).

(3) Where the ceiling protection is based on Class I or Class II commodities, the allowable number ofpallet loads for Class IV or Group A plastics shall be reduced to five.

5.6.1.2.4 Mixed Commodity Segregation.

The protection requirements for the lower commodity class shall be permitted to be utilized in the area oflower commodity class, where the higher hazard material is confined to a designated area and the area isprotected to the higher hazard in accordance with the requirements of this standard.

5.6.2 Pallet Types.

5.6.2.1 General.

When loads are palletized, the use of wood or metal pallets, or listed pallets equivalent to wood, shall beassumed in the classification of commodities.

5.6.2.2* Unreinforced Plastic Pallets.

For Class I through Class IV commodities, when unreinforced polypropylene or unreinforced high-densitypolyethylene plastic pallets are used, the classification of the commodity unit shall be increased one class.

5.6.2.2.1

Unreinforced polypropylene or unreinforced high-density polyethylene plastic pallets shall be marked witha permanent symbol to indicate that the pallet is unreinforced.

5.6.2.3*

For Class I through Class IV commodities, when reinforced polypropylene or reinforced high-densitypolyethylene plastic pallets are used, the classification of the commodity unit shall be increased twoclasses except for Class IV commodity, which shall be increased to a cartoned unexpanded Group Aplastic commodity.


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5.6.2.3.1

Pallets shall be assumed to be reinforced if no permanent marking or manufacturer's certification ofnonreinforcement is provided.

5.6.2.4

No increase in the commodity classification shall be required for Group A plastic commodities stored onplastic pallets.

5.6.2.5

For ceiling-only sprinkler protection, the requirements of 5.6.2.2 and 5.6.2.3 shall not apply where plasticpallets are used and where the sprinkler system uses spray sprinklers with a minimum K-factor of K-16.8(240).

5.6.2.6

The requirements of 5.6.2.2 through 5.6.2.7 shall not apply to nonwood pallets that have demonstrated afire hazard that is equal to or less than wood pallets and are listed as such.

5.6.2.7

For Class I through Class IV commodities stored on plastic pallets when other than wood, metal, orpolypropylene or high-density polyethylene plastic pallets are used, the classification of the commodityunit shall be determined by specific testing conducted by a national testing laboratory or shall beincreased two classes.

5.6.3* Commodity Classes.

5.6.3.1* Class I.

A Class I commodity shall be defined as a noncombustible product that meets one of the following criteria:

(1) Placed directly on wood pallets

(2) Placed in single-layer corrugated cartons, with or without single-thickness cardboard dividers, with orwithout pallets

(3) Shrink-wrapped or paper-wrapped as a unit load with or without pallets

5.6.3.2* Class II.

A Class II commodity shall be defined as a noncombustible product that is in slatted wooden crates, solidwood boxes, multiple-layered corrugated cartons, or equivalent combustible packaging material, with orwithout pallets.

5.6.3.3* Class III.

5.6.3.3.1

A Class III commodity shall be defined as a product fashioned from wood, paper, natural fibers, or GroupC plastics with or without cartons, boxes, or crates and with or without pallets.

5.6.3.3.2

A Class III commodity shall be permitted to contain a limited amount (5 percent by weight or volume orless) of Group A or Group B plastics.

5.6.3.4* Class IV.


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5.6.3.4.1

A Class IV commodity shall be defined as a product, with or without pallets, that meets one of thefollowing criteria:

(1) Constructed partially or totally of Group B plastics

(2) Consists of free-flowing Group A plastic materials

(3) Contains within itself or its packaging an appreciable amount (5 percent to 15 percent by weight or 5percent to 25 percent by volume) of Group A plastics of Group A plastics as indicated in Figure5.6.3.4.1

Figure 5.6.3.4.1 Classification of Commodities Containing Group A or B Plastics.

5.6.3.4.2

The remaining materials shall be permitted to be metal, wood, paper, natural or synthetic fibers, or GroupB or Group C plastics.

5.6.4* Classification of Plastics, Elastomers, and Rubber.

Plastics, elastomers, and rubber shall be classified as Group A, Group B, or Group C.


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5.6.4.1* Group A.

The following materials shall be classified as Group A:

(1) ABS (acrylonitrile-butadiene-styrene copolymer)

(2) Acetal (polyformaldehyde)

(3) Acrylic (polymethyl methacrylate)

(4) Butyl rubber

(5) EPDM (ethylene-propylene rubber)

(6) FRP (fiberglass-reinforced polyester)

(7) Natural rubber (if expanded)

(8) Nitrile-rubber (acrylonitrile-butadiene-rubber)

(9) PET (thermoplastic polyester)

(10) Polybutadiene

(11) Polycarbonate

(12) Polyester elastomer

(13) Polyethylene

(14) Polypropylene

(15) Polystyrene

(16) Polyurethane

(17) PVC (polyvinyl chloride — highly plasticized, with plasticizer content greater than 20 percent) (rarelyfound)

(18) SAN (styrene acrylonitrile)

(19) SBR (styrene-butadiene rubber)

5.6.4.2 Group B.

The following materials shall be classified as Group B:

(1) Cellulosics (cellulose acetate, cellulose acetate butyrate, ethyl cellulose)

(2) Chloroprene rubber

(3) Fluoroplastics (ECTFE — ethylene-chlorotrifluoro-ethylene copolymer; ETFE — ethylene-tetrafluoroethylene-copolymer; FEP — fluorinated ethylene-propylene copolymer)

(4) Natural rubber (not expanded)

(5) Nylon (nylon 6, nylon 6/6)

(6) Silicone rubber

5.6.4.3 Group C.

The following materials shall be classified as Group C:

(1) Fluoroplastics (PCTFE — polychlorotrifluoroethylene; PTFE — polytetrafluoroethylene)

(2) Melamine (melamine formaldehyde)

(3) Phenolic

(4) PVC (polyvinyl chloride — flexible — PVCs with plasticizer content up to 20 percent)

(5) PVDC (polyvinylidene chloride)

(6) PVDF (polyvinylidene fluoride)

(7) PVF (polyvinyl fluoride)

(8) Urea (urea formaldehyde)

5.6.4.4


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Cartoned Group A plastics shall be further subdivided as either expanded or nonexpanded unexpanded .

5.6.4.4.1

If a cartoned the commodity is more than 40 percent (by volume) cartoned expanded plastic, it shall beprotected as a cartoned expanded Group A plastic.

5.6.4.4.2

Exposed commodities containing greater than 25 percent by volume expanded plastic shall be protectedas an exposed expanded plastic.

5.6.5* Classification of Rolled Paper Storage.

For the purposes of this standard, the classifications of paper described in 5.6.5.1 through 5.6.5.4 shallapply and shall be used to determine the sprinkler system design criteria.

5.6.5.1 Heavyweight Class.

Heavyweight class shall be defined so as to include paperboard and paper stock having a basis weight

[weight per 1000 ft2 (92.9 m2)] of 20 lb (9.1 kg).

5.6.5.2 Mediumweight Class.

Mediumweight class shall be defined so as to include all the broad range of papers having a basis weight

[weight per 1000 ft2 (92.9 m2)] of 10 lb to 20 lb (4.5 kg to 9.1 kg).

5.6.5.3 Lightweight Class.

Lightweight class shall be defined so as to include all papers having a basis weight [weight per 1000 ft2

(92.9 m2)] of 10 lb (4.5 kg).

5.6.5.4 Tissue.

5.6.5.4.1

Tissue shall be defined so as to include the broad range of papers of characteristic gauzy texture, which,in some cases, are fairly transparent.

5.6.5.4.2

For the purposes of this standard, tissue shall be defined as the soft, absorbent type, regardless of basisweight — specifically, crepe wadding and the sanitary class including facial tissue, paper napkins,bathroom tissue, and toweling.

Chapter 6 was revised by a tentative interim amendment (TIA). See page 1.



FIGURE_5.6.3.4.1.docx Group A Plastics Figure for Ch5




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Committee Statement

CommitteeStatement:

Section 5.6 has been revised by replacing the 5-to-15 percent by weight and 5-to-25 percent byvolume requirement for group a plastics by utilizing a a new figure 5.6.3.4.1 to determine theappropriate commodity classification for mixed commodities. This table looks at both the percentageweight and percentage volume and includes Class III, Class IV and Group A options depending onthe percentage of the plastic versus other materials. Section 5.6.4.4 was revised to address cartonedplastics only. Section 5.6.4.4.2 was relocated into the notes associated with the new table as i no


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longer fit in the "cartoned" plastic section since it was dealing with exposed material.

ResponseMessage:

Public Input No. 283-NFPA 13-2013 [Sections 5.6.4.4.1, 5.6.4.4.2]

Public Input No. 413-NFPA 13-2013 [Section No. A.5.6.3]

Public Input No. 414-NFPA 13-2013 [New Section after 5.6.4.4.2]

Public Input No. 494-NFPA 13-2013 [Section No. 5.6]



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FIGURE 5.6.3.4.1 Classification of Commodities Containing Group A or B plastics


6.1.1.4

Materials meeting the requirements of 9.1.1.2, 9.1.1.5.2, and 9.1.1.5.3, and 9.1.1.6.4 shall not berequired to be listed.




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Committee Statement

CommitteeStatement:

1) Section 9.1.1.5.2 is editorially clarified to indicate the rod material is mild steel. 2) A new Section9.1.1.5.3 is being proposed since hanger rods were not specifically mentioned as a device that doesnot require Listing. 3) A new Section 9.1.1.6.3 was added since there are no requirements in thestandard for the hanger rod. The hanger rod is a critical component in maintaining the integrity of thesprinkler system and minimum requirements for the rod need to be specified. The hanger rod isassumed by designers and contractors to have characteristics that will provide the anticipatedperformance after installation. The addition of the requirements in this section should provide theguidance for the anticipated performance. 4) Section 6.1.1.4 needs to be revised to reference thenew 9.1.1.6.3.

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6.1.1.6

The new materials or devices listing instructions shall identify and specify the existing systemcomponents, including the fluids conveyed, with which the new listed materials, devices, or componentsare compatible. Materials and components shall be installed in accordance with material compatibilityinformation that is available as a part of a listing or manufacturer's published information.

6.1.1.6.1

This listing requirement shall also apply to chemical or material modifications made to componentslisted in Table 6.3.1.1 and Table 6.4.1 .




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Committee Statement

CommitteeStatement:

The requirement as written is confusing since it does not indicate what constitutes a new material ordevices. In addition, many of the products included in the referenced tables are not listed. It alsoplaces a burden on the manufacturer to continually monitor new materials and devices that could beused in a system, which is an impractical requirement. Test methods to determine materialcompatibility for certain products are being developed as part of a project to develop a new ANSIstandard for this application. Therefore, using the compatibility information that is available at thetime of system design is more meaningful.

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6.2.1.1*


When a sprinkler has been removed for any reason is removed from a fitting or welded outlet , it shall notbe reinstalled except as permitted by 6.2.1.1.1 .

6.2.1.1.1*


Dry sprinklers shall be permitted to be reinstalled where they are not removed by applying torque at thepoint where the sprinkler is attached to the barrel.




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Committee Statement

CommitteeStatement:

The concern of mechanical damage associated with removing sprinklers is applying torque on thesprinkler itself. Sprinklers that are removed by applying torque on a fitting can be reused. Specialrequirements addressing dry sprinklers have been added.

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6.2.9.3

The sprinklers shall be kept in a cabinet located where the temperature to which they are subjected will atno time exceed 100°F (38°C) the maximum ceiling temperatures specified in Table 6.2.5.1 for each of thesprinklers within the cabinet .




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CommitteeStatement:

Facilities that only include intermediate or high temperature sprinklers (or higher), including thosemaintained within the spare head box need not have a space conditioned to maintain temperaturesat 100F or less. A reference back to Table 6.2.5.1 will allow such an arrangment.

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First Revision No. 54-NFPA 13-2013 [ Section No. 6.3.1.1 [Excluding any Sub-Sections] ]

Pipe or tube shall meet or exceed one of the standards in Table 6.3.1.1 or be in accordance with 6.3.7.8.

Table 6.3.1.1 Pipe or Tube Materials and Dimensions


Ferrous Piping (Welded and Seamless)

Specification for Black and Hot-Dipped Zinc-Coated (Galvanized) Welded andSeamless Steel Pipe for Fire Protection Use

ASTM A 795

Specification for Pipe, Steel, Black and Hot-Dipped, Zinc-Coated, Welded andSeamless

ANSI/ASTM A 53

Wrought Steel PipeANSI/ASMEB36.10M

Specification for Electric-Resistance-Welded Steel Pipe ASTM A 135

Copper Tube (Drawn, Seamless)

Specification for Seamless Copper Tube ASTM B 75

Specification for Seamless Copper Water Tube ASTM B 88

Specification for General Requirements for Wrought Seamless Copper andCopper-Alloy Tube

ASTM B 251

Specification for Liquid and Paste Fluxes for Soldering Applications of Copper andCopper-Alloy Tube

ASTM B 813

Brazing Filler Metal (Classification BCuP-3 or BCuP-4) AWS A5.8

Solder Metal, Section 1: Solder Alloys Containing Less Than 0.2% Lead and HavingSolidus Temperatures Greater than 400°F

ASTM B 32

Alloy Materials ASTM B 446

CPVC

Nonmetallic Piping Specification for Special Listed Chlorinated Polyvinyl chloride(CPVC) Pipe

ASTM F 442

Brass Pipe

Specification for Seamless Red Brass Pipe ASTM B 43

Stainless Steel

Specification for Seamless, Welded, and Heavily Cold Worked Austenitic StainlessSteel Pipes

ASTMA312/312M




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Committee Statement: Added stainless steel as a common used material.

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Public Input No. 455-NFPA 13-2013 [Section No. 6.3.1.1 [Excluding any Sub-Sections]]


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6.3.1.6

Stainless steel pipe shall be in accordance with 6.3.7 .




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Committee Statement: Adding stainless steel as a common pipe material.

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6.3.1.5

Brass pipe shall be in accordance with 6.3.6.




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Committee Statement

Committee Statement: This section has been revised to provide the correct reference.

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6.3.7* Nonmetallic Pipe.

Nonmetallic pipe in accordance with Table 6.3.1.1 shall be investigated for suitability in automaticsprinkler installations and listed for this service.

6.3.7.1

Listed nonmetallic pipe shall be installed in accordance with its listing limitations, including installationinstructions.

6.3.7.1.1

Manufacturer's installation instructions shall include its listing limitations.

6.3.7.2


When nonmetallic pipe is used in combination systems utilizing steel piping internally coated withcorrosion inhibitors and nonmetallic piping , the steel pipe coating shall be investigated listed forcompatibility with the nonmetallic piping by a testing laboratory pipe materials .

6.3.7.3


When nonmetallic pipe is used in combination systems utilizing steel pipe that is not internally coatedwith chemical corrosion inhibitors, no additional evaluations shall be required.

6.3.7.4*


When nonmetallic pipe is used in combination systems utilizing steel pipe, cutting oils and lubricantsused for fabrication of the steel piping shall be compatible with the nonmetallic pipe materials inaccordance with 6.1.1.6 .

6.3.7.5

Fire-stopping materials intended for use on nonmetallic piping penetrations shall be investigated forcompatibility compatible with the nonmetallic pipe materials in accordance with 6.1.1.6 .

6.3.7.6

Nonmetallic pipe listed for light hazard occupancies shall be permitted to be installed in ordinary hazard

rooms of otherwise light hazard occupancies where the room does not exceed 400 ft2 (37 m2).

6.3.7.7

Nonmetallic pipe shall not be listed for portions of an occupancy classification.

6.3.7.8* Listed Pipe and Tubing.

6.3.7.8.1

Other types of pipe or tube investigated for suitability in automatic sprinkler installations and listed for thisservice, including but not limited to CPVC and steel, and differing from that provided in Table 6.3.1.1 shallbe permitted where installed in accordance with their listing limitations, including installation instructions.

6.3.7.8.2

Pipe or tube listed for light hazard occupancies shall be permitted to be installed in ordinary hazard rooms

of otherwise light hazard occupancies where the room does not exceed 400 ft2 (37 m2).

6.3.7.8.2.1

Pipe or tube installed in accordance with 6.3.7.8.2 shall be permitted to be installed exposed, inaccordance with the listing.

6.3.7.8.3

Pipe or tube shall not be listed for portions of an occupancy classification.

6.3.7.8.4

Bending of listed pipe and tubing shall be permitted as allowed by the listing.

6.3.7.9 Pipe and Tube Bending.


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6.3.7.9.1

Bending of Schedule 10 steel pipe, or any steel pipe of wall thickness equal to or greater than Schedule10 and Types K and L copper tube, shall be permitted when bends are made with no kinks, ripples,distortions, or reductions in diameter or any noticeable deviations from round.

6.3.7.9.2

For Schedule 40 and copper tubing, the minimum radius of a bend shall be six pipe diameters for pipesizes 2 in. (50 mm) and smaller and five pipe diameters for pipe sizes 21⁄2 in. (65 mm) and larger.

6.3.7.9.3

For all other steel pipe, the minimum radius of a bend shall be 12 pipe diameters for all sizes.

6.3.7.9.4

Bending of listed pipe and tubing shall be permitted as allowed by the listing.

6.3.7.10 Pipe and Tube Identification.

6.3.7.10.1*

All pipe, including specially listed pipe allowed by 6.3.7.8, shall be marked along its length by themanufacturer in such a way as to properly identify the type of pipe.

6.3.7.10.2

The marking shall be visible on every piece of pipe over 2 ft (610 mm) long.

6.3.7.10.3

Pipe identification shall include the manufacturer's name, model designation, or schedule.




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Committee Statement

CommitteeStatement:

Compatibility consideration is necessary when other materials or chemicals come in contact withnon-metlalic piping and fittings that can cause degradation of performance of the pipe due tointeraction of materials. The revised section 6.3.7 and associated annex text have been reorganizedfor consistency with the language proposed for NFPA 13R. Test methods to determine materialcompatibility for certain products are being developed as part of a project to develop a new ANSIstandard for this application. Therefore, using the compatibility information that is available at thetime of system design is more meaningful.

ResponseMessage:

Public Input No. 27-NFPA 13-2013 [New Section after 6.10]





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6.3.8 Stainless Steel Pipe.

Stainless steel pipe as referenced in the standards listed in Table 6.3.1.1 shall be in accordance withSchedules 10S or 40S pipe.




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Committee Statement

Committee Statement: Adding stainless steel as a common sprinkler pipe material.

Response Message:



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6.4 Fittings.

6.4.1

Fittings used in sprinkler systems shall meet or exceed the standards in Table 6.4.1 or be in accordancewith 6.4.2 or 6.4.4.

Table 6.4.1 Fittings Materials and Dimensions


Cast Iron

Cast Iron Threaded Fittings, Class 125 and 250 ASME B16.4

Cast Iron Pipe Flanges and Flanged Fittings ASME B16.1

Malleable Iron

Malleable Iron Threaded Fittings, Class 150 and 300 ASME B16.3

Steel

Factory-Made Wrought Steel Buttweld Fittings ASME B16.9

Buttwelding Ends for Pipe, Valves, Flanges, and Fittings ASME B16.25

Specification for Piping Fittings of Wrought Carbon Steel and Alloy Steel forModerate and Elevated Temperatures

ASTM A 234

Steel Pipe Flanges and Flanged Fittings ASME B16.5

Forged Steel Fittings, Socket Welded and Threaded ASME B16.11

Copper

Wrought Copper and Copper Alloy Solder Joint Pressure Fittings ASME B16.22

Cast Copper Alloy Solder Joint Pressure Fittings ASME B16.18

CPVC

Chlorinated Polyvinyl Chloride (CPVC) Specification for Schedule 80 CPVCThreaded Fittings

ASTM F 437

Specification for Schedule 40 CPVC Socket Type Fittings ASTM F 438

Specification for Schedule 80 CPVC Socket Type Fittings ASTM F 439

Bronze Fittings

Cast Bronze Threaded Fittings ASTM B16.15

Stainless Steel

Specification for Wrought Austenitic Stainless Steel Pipe FittingsASTMA403/A403M

6.4.2

In addition to the standards in Table 6.4.1, nonmetallic fittings shall also be in accordance with 6.4.4.

6.4.3 Nonmetallic Fittings.

Nonmetallic fittings in accordance with Table 6.4.1 shall be investigated for suitability in automaticsprinkler installations and listed for this service. Listed nonmetallic fittings shall be installed in accordancewith their listing limitations, including installation instructions.

6.4.3.1*

When nonmetallic fittings are used in combination systems utilizing internally coated steel piping andnonmetallic fittings , the steel pipe shall be investigated listed for compatibility with the nonmetallic fittingsby a testing laboratory. Cutting oils and lubricants used for fabrication of the steel piping shall becompatible with the nonmetallic fitting materials .


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6.4.3.2*

When nonmetallic fittings are used in combination systems utilizing non–internally coated steel pipingand nonmetallic fittings steel pipe that is not internally coated with corrosion inhibitors , no additionalevaluations are required. Cutting oils and lubricants used for fabrication of the steel piping shall becompatible with the nonmetallic fitting materials.

6.4.3.3

When nonmetallic fittings are used in systems utilizing steel pipe, cutting oils and lubricants used forfabrication of the steel piping shall be compatible with the nonmetallic fittings in accordance with6.1.1.6 .

6.4.3.4

Fire-stopping materials intended for use on nonmetallic fitting penetrations shall be investigated forcompatibility with the nonmetallic fitting materials in accordance with 6.1.1.6 .

6.4.4*

Other types of fittings investigated for suitability in automatic sprinkler installations and listed for thisservice, including but not limited to CPVC and steel, and differing from that provided in Table 6.4.1 shallbe permitted when installed in accordance with their listing limitations, including installation instructions.

6.4.5* Fitting Pressure Limits.

6.4.5.1

Standard weight pattern cast-iron fittings 2 in. (50 mm) in size and smaller shall be permitted wherepressures do not exceed 300 psi (20.7 bar).

6.4.5.2

Standard weight pattern malleable iron fittings 6 in. (150 mm) in size and smaller shall be permitted wherepressures do not exceed 300 psi (20.7 bar).

6.4.5.3

Fittings not meeting the requirements of 6.4.5.1 and 6.4.5.2 shall be extra-heavy pattern where pressuresexceed 175 psi (12.1 bar).

6.4.5.4

Cast bronze threaded fittings in accordance with ASTM B 16.15, Cast Bronze Threaded Fittings, shall bepermitted where pressures do not exceed 200 psi (13.7 bar) for Class 125 fittings and 400 psi (27.6 bar)for Class 250 fittings.

6.4.5.5

Listed fittings shall be permitted for system pressures up to the limits specified in their listings.

6.4.6* Couplings and Unions.

6.4.6.1

Screwed unions shall not be used on pipe larger than 2 in. (50 mm).

6.4.6.2

Couplings and unions of other than screwed-type shall be of types listed specifically for use in sprinklersystems.

6.4.7 Reducers and Bushings.

6.4.7.1

Unless the requirements of 6.4.7.2 or 6.4.7.3 are met, a one-piece reducing fitting shall be used wherevera change is made in the size of the pipe.

6.4.7.2

Hexagonal or face bushings shall be permitted in reducing the size of openings of fittings when standardfittings of the required size are not available.

6.4.7.3

Hexagonal bushings as permitted in 8.15.20.2 shall be permitted to be used.

6.4.7.4

The requirements of 6.4.7.1 and 6.4.7.2 shall not apply to CPVC fittings.


6.4.8.1

The outlet diameter of the extension fitting shall be equal to the inlet diameter of the sprinkler.

6.4.8.2

A single extension fitting up to a maximum of 2 in. (50 mm) in length shall be permitted to be installedwith a sprinkler.


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6.4.8.2.1

The extension fitting shall be included in the hydraulic calculations.

6.4.8.2.2

The requirement of 6.4.8.2.1 shall not apply where the sprinkler is listed for use with the extensionnipple.




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Committee Statement

CommitteeStatement:

CPVC is a plastic material and compatibility consideration is necessary when other materials orchemicals come in contact with CPVC that can cause degradation of performance of the pipe due tointeraction of materials. The revised section 6.3.7 and associated annex text have been reorganizedfor consistency with the language proposed for NFPA 13R. Test methods to determine materialcompatibility for certain products are being developed as part of a project to develop a new ANSIstandard for this application. Therefore, using the compatibility information that is available at thetime of system design is more meaningful.

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6.4.8.1

The outlet diameter of the extension fitting shall be equal to the inlet diameter of the sprinkler.

6.4.8.2

A single extension fitting up to a maximum of 2 in. (50 mm) in length shall be permitted to be installedwith a sprinkler.

6.4.8.2.1

The extension fitting shall be included in the hydraulic calculations.

6.4.8.2.2

The requirement of 6.4.8.2.1 shall not apply where the sprinkler is listed for use with the extensionnipple.




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Committee Statement

CommitteeStatement:

The use of sprinkler extension (cheater) nipples has become commonplace without regard forfriction loss or concern for the number of nipples used. During inspections and re-model work, Ihave witnessed as many as five extension nipples stacked at a single sprinkler. Installers should bere-cutting the drop nipple rather than stacking these un-listed sprinkler head extenders.

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6.6* Hangers.

Hangers shall be in accordance with the requirements of Section 9.1 .




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Committee Statement

CommitteeStatement:

NFPA 13 chapters have been in the current format since the 2002 edition. It is unnecessary tohave section 6.6 Hangers in chapter 6 and refer the user to chapter 9. if this is needed, then thesection should be revised to include bracing and restraint.

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6.6.4.1

All control, drain, venting, and test connection valves shall be provided with permanently markedweatherproof metal or rigid plastic identification signs.




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CommitteeStatement:

Venting trapped air in a wet system can help manage problems in four areas: water delivery time,alarm ring delay, water flow alarm cyclic ringing, and corrosion activity. Trapped air in wet systemsdrastically increases corrosion by increasing the oxygen concentration in the water. When air getstrapped with water under pressure, the concentration of dissolved oxygen can rise upwards to 35 –40ppm (6-8ppm is common tap water). Corrosion rates respond linearly to dissolved oxygenconcentrations. In wet sprinkler systems visual evidence of trapped air corrosion is seen along theair-water interface line. This creates opportunities for the formation of tubercles and other corrosiondeposits that can affect water design flow, cause blockages, and even lead to leaks. As a means foraddressing these concerns, new language for pipe venting has been added to sections 7.1.5, 8.16.6,25.6.2, and 6.7.4.1.

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7.1.5 Air Venting.

A single, air vent with a connection shall be provided on each wet pipe system utilizing black orgalvanized steel pipe as a means for venting.




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CommitteeStatement:


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7.2.6.6.3

The automatic air supply to more than one dry pipe system shall be connected to enable individualmaintenance of air pressure in each system.

7.2.6.6.3.1

Each dry pipe system shall have an air maintenance device.




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Committee Statement

CommitteeStatement:

The original code requirement did not address whether or not each system must have an airmaintenance device. The subsection is added to clarify the requirement.

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7.6.1.2

Antifreeze shall not be used in ESFR systems unless the ESFR sprinkler is listed for use with theantifreeze solution.




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Committee Statement

CommitteeStatement:

Note: This Proposal originates from Tentative Interim Amendment 13-13-1 (TIA 1066) issued by theStandards Council on August 9, 2012. The information provided in the Fire Protection ResearchFoundation report “Antifreeze Solutions Supplied through Spray Sprinklers: Interim Report” illustratesthat under certain conditions (pressure, fire size, k-factor, ceiling height, deflector design…etc) a 50%glycerine solution is capable of igniting and causing a dramatic increase in heat release rate. As notedin the FPRF report, these results highlight the “complicated interaction between sprinkler spray andthe ignition source.”As a result of this additional testing, there are more questions that need to beanswered, and the testing shows that concentrations of anti-freeze that previous testing indicated wereacceptable and would not support combustion actually do with a stronger ignition source. In addition,sprinklers with larger orifices that require lower pressure than typical residential sprinklers andpotentially a lager droplet distribution also ignited. It is clear that further testing is need to fullyunderstand under what conditions an anti-freeze solutions are safe, anti-freeze solutions can not beallowed in sprinkler systems. This TIA calls for the use of Listed Antifreeze Solutions. Using listedantifreeze solutions will ensure that the solution discharged from a sprinkler system will not ignite orcause a dramatic increase in heat release rate of a fire. The process for developing listed products willalso allow for a continued improvement in fire and life safety in environments meeting the NFPA Codesand Standards. This TIA also calls for the continued acceptance of currently listed ESFR AntifreezeSystems. The listing process has already shown that, in some cases, it is possible to use currentantifreeze solutions to provide the level of protection prescribed by NFPA 13. For this reason, it isproposed to allow the continued use of propylene-glycol solutions in systems and in protectionscenarios that have been thoroughly tested to demonstrate such results. There are ESFR systemscurrently available that have been specifically tested and listed with a specific model of sprinkler andsolution delivery method that provide an appropriate level of protection as to be considered “EarlySuppression”. Emergency Nature: The latest testing from The Fire Protection Research Foundationtitled Antifreeze Solutions Supplied through Spray Sprinklers Interim Report (dated February 2012)shows that anti-freeze concentrations currently allowed in new NFPA 13 sprinkler systems maysupport combustion and increase the size of the fire. This is a safety issue that requires changes in thestandard. The following are two items which make this TIA of emergency nature. Only one is requiredfor substantiation of an emergency nature. (d) The proposed TIA intends to offer to the public a benefitthat would lessen a recognized (known) hazard or ameliorate a continuing dangerous condition orsituation During the latest revision cycle the committee evaluated the test data that was present at thetime of the cycle. The committee could not anticipate that additional data would change ourjustifications during the process. The new data demonstrates that variables utilized in the developmentof the 2013 edition may lead to changes in the fire involvement. Propylene glycol and glycerinantifreeze solutions discharged from sprinklers have the potential to ignite under certain conditions.Research testing has indicated that several variables may influence the potential for large scale


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ignition of the antifreeze solution discharged from a sprinkler. These variables include, but are notlimited to, the concentration of antifreeze solution, sprinkler discharge characteristics, inlet pressure atthe sprinkler, location of fire relative to the sprinkler, and size of fire at the time of sprinkler discharge.(f ) The proposed TIA intends to correct a circumstance in which the revised document has resulted inan adverse impact on a product or method that was inadvertently overlooked in the total revisionprocess, or was without adequate technical (safety) justification for the action. Antifreeze solutionshave been subject to recent testing and the new data shows that the installations found within thestandard do not account for the complete safety of the occupant. The data appears to provideadditional questions and challenges the parameters of installation found in the standard. The use ofpropylene glycol and glycerin antifreeze solutions should only be considered when other sprinklersystem design alternatives are not available or practical. If these solutions are used, all relevant dataand information should be carefully reviewed and considered in the sprinkler system.

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7.6.2* Antifreeze Solutions.

7.6.2.1*

Except as permitted in 7.6.2.2, antifreeze solutions shall be listed for use in sprinkler systems.

7.6.2.2

Premixed antifreeze solutions of propylene glycol shall be permitted to be used with ESFR sprinklerswhere the ESFR sprinklers are listed for such use in a specific application.




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Committee Statement

CommitteeStatement:

Note: This Proposal originates from Tentative Interim Amendment 13-13-1 (TIA 1066) issued by theStandards Council on August 9, 2012. The information provided in the Fire Protection ResearchFoundation report “Antifreeze Solutions Supplied through Spray Sprinklers: Interim Report” illustratesthat under certain conditions (pressure, fire size, k-factor, ceiling height, deflector design…etc) a 50%glycerine solution is capable of igniting and causing a dramatic increase in heat release rate. As notedin the FPRF report, these results highlight the “complicated interaction between sprinkler spray andthe ignition source.”As a result of this additional testing, there are more questions that need to beanswered, and the testing shows that concentrations of anti-freeze that previous testing indicated wereacceptable and would not support combustion actually do with a stronger ignition source. In addition,sprinklers with larger orifices that require lower pressure than typical residential sprinklers andpotentially a lager droplet distribution also ignited. It is clear that further testing is need to fullyunderstand under what conditions an anti-freeze solutions are safe, anti-freeze solutions can not beallowed in sprinkler systems. This TIA calls for the use of Listed Antifreeze Solutions. Using listedantifreeze solutions will ensure that the solution discharged from a sprinkler system will not ignite orcause a dramatic increase in heat release rate of a fire. The process for developing listed products willalso allow for a continued improvement in fire and life safety in environments meeting the NFPA Codesand Standards. This TIA also calls for the continued acceptance of currently listed ESFR AntifreezeSystems. The listing process has already shown that, in some cases, it is possible to use currentantifreeze solutions to provide the level of protection prescribed by NFPA 13. For this reason, it isproposed to allow the continued use of propylene-glycol solutions in systems and in protectionscenarios that have been thoroughly tested to demonstrate such results. There are ESFR systemscurrently available that have been specifically tested and listed with a specific model of sprinkler andsolution delivery method that provide an appropriate level of protection as to be considered “EarlySuppression”. Emergency Nature: The latest testing from The Fire Protection Research Foundationtitled Antifreeze Solutions Supplied through Spray Sprinklers Interim Report (dated February 2012)shows that anti-freeze concentrations currently allowed in new NFPA 13 sprinkler systems maysupport combustion and increase the size of the fire. This is a safety issue that requires changes in thestandard. The following are two items which make this TIA of emergency nature. Only one is requiredfor substantiation of an emergency nature. (d) The proposed TIA intends to offer to the public a benefitthat would lessen a recognized (known) hazard or ameliorate a continuing dangerous condition orsituation During the latest revision cycle the committee evaluated the test data that was present at thetime of the cycle. The committee could not anticipate that additional data would change ourjustifications during the process. The new data demonstrates that variables utilized in the development


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of the 2013 edition may lead to changes in the fire involvement. Propylene glycol and glycerinantifreeze solutions discharged from sprinklers have the potential to ignite under certain conditions.Research testing has indicated that several variables may influence the potential for large scaleignition of the antifreeze solution discharged from a sprinkler. These variables include, but are notlimited to, the concentration of antifreeze solution, sprinkler discharge characteristics, inlet pressure atthe sprinkler, location of fire relative to the sprinkler, and size of fire at the time of sprinkler discharge.(f ) The proposed TIA intends to correct a circumstance in which the revised document has resulted inan adverse impact on a product or method that was inadvertently overlooked in the total revisionprocess, or was without adequate technical (safety) justification for the action. Antifreeze solutionshave been subject to recent testing and the new data shows that the installations found within thestandard do not account for the complete safety of the occupant. The data appears to provideadditional questions and challenges the parameters of installation found in the standard. The use ofpropylene glycol and glycerin antifreeze solutions should only be considered when other sprinklersystem design alternatives are not available or practical. If these solutions are used, all relevant dataand information should be carefully reviewed and considered in the sprinkler system.

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7.6.3.4

A listed 1⁄2 in. (12 mm) relief valve shall be permitted in lieu of the expansion chamber required in 7.6.3.3,and as illustrated in Figure 7.6.3.4 , provided the antifreeze system volume does not exceed 40 gal (151L) as illustrated in Figure 7.6.3.4 .

Figure 7.6.3.4 Arrangement of Supply Piping with Relief Valve and Backflow Device.



NFPA_13_7.6.3.4.png Revised image



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Committee Statement

CommitteeStatement:

The change to Figure 7.6.3.4 would eliminate having someone think that by adding the Relief Valve,the means for conducting the full forward flow test does not have to be piped in to the system, asshown in figure 7.6.3.3.The revisions to the drawing illustrate that the relief valve is not the meansfor conducting the full flow test (PI 52). Specific revisions to the figure are as follows: 1)Insert testoutlet and control valve (and notes) from Fig 7.6.3.3 between the backflow and the tee. 2)ReverseArrow on Check Valve

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7.7 Automatic Sprinkler Systems with Non–Fire Protection Connections.

7.7.1 Circulating Closed-Loop Systems.

7.7.1.1 System Components.

7.7.1.1.1

A circulating closed-loop system is primarily a sprinkler system and shall comply with all provisions ofthis standard such as those for control valves, area limitations of a system, alarms, fire departmentconnections, sprinkler spacing, and so forth, except as modified by Section 7.7 .

7.7.1.1.2

Piping, fittings, valves, and pipe hangers shall meet the requirements specified in Chapter 6 .

7.7.1.1.3

Unless the requirements of 7.7.1.1.4 are met, a dielectric fitting shall be installed in the junction wheredissimilar piping materials are joined (e.g., copper to steel).

7.7.1.1.4

Dielectric fittings shall not be required in the junction where sprinklers are connected to piping.

7.7.1.1.5

Other auxiliary devices shall not be required to be listed for sprinkler service; however, these devices,such as pumps, circulating pumps, heat exchangers, radiators, and luminaires, shall be pressure ratedat 175 psi or 300 psi (12.1 bar or 20.7 bar) (rupture pressure of five times rated water system workingpressure) to match the required rating of sprinkler system components.

7.7.1.1.6

Auxiliary devices shall incorporate materials of construction and be so constructed that they willmaintain their physical integrity under fire conditions to avoid impairment to the fire protection system.

7.7.1.1.7

Auxiliary devices, where hung from the building structure, shall be supported independently from thesprinkler portion of the system, following recognized engineering practices.

7.7.1.2* Hydraulic Characteristics.

Piping systems for attached heating and cooling equipment shall have auxiliary pumps or anarrangement made to return water to the piping system in order to ensure the following:

(1) Water for sprinklers shall not be required to pass through heating or cooling equipment.

(2) At least one direct path shall exist for waterflow from the sprinkler water supply to every sprinkler.

(3) Pipe sizing in the direct path shall be in accordance with the design requirements of this standard.

(4) No portions of the sprinkler piping shall have less than the sprinkler system design pressure,regardless of the mode of operation of the attached heating or cooling equipment.

(5) There shall be no loss or outflow of water from the system due to or resulting from the operation ofheating or cooling equipment.

(6) Shutoff valves and a means of drainage shall be provided on piping to heating or coolingequipment at all points of connection to sprinkler piping and shall be installed in such a manner asto make possible repair or removal of any auxiliary component without impairing the serviceabilityand response to the sprinkler system.

(7) All auxiliary components, including the strainer, shall be installed on the auxiliary equipment sideof the shutoff valves.

7.7.1.3 Water Temperature.

7.7.1.3.1 Maximum.

7.7.1.3.1.1

In no case shall maximum water temperature flowing through the sprinkler portion of the system exceed120°F (49°C).


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7.7.1.3.1.2

Protective control devices listed for this purpose shall be installed to shut down heating or coolingsystems when the temperature of water flowing through the sprinkler portion of the system exceeds120°F (49°C).

7.7.1.3.1.3

Where the water temperature exceeds 100°F (37.8°C), intermediate or higher temperature–ratedsprinklers shall be used.

7.7.1.3.2 Minimum.

Precautions shall be taken to ensure that temperatures below 40°F (4°C) are not permitted.

7.7.1.4 Obstruction to Discharge.

Automatic sprinklers shall not be obstructed by auxiliary devices, piping, insulation, and so forth, fromdetecting fire or from proper distribution of water.

7.7.1.5 Signs.

7.7.1.5.1

Caution signs shall be attached to all valves controlling sprinklers.

7.7.1.5.2

The caution sign shall be worded as follows:

This valve controls fire protection equipment. Do not close until after fire has been extinguished. Useauxiliary valves when necessary to shut off supply to auxiliary equipment.

CAUTION: Automatic alarm can be sounded if this valve is closed.

7.7.1.6 Water Additives.

7.7.1.6.1

Materials added to water shall not adversely affect the fire-fighting properties of the water and shall be inconformity with any state or local health regulations.

7.7.1.6.2

Due care and caution shall be given to the use of additives that can remove or suspend scale from olderpiping systems.

7.7.1.6.3

Where additives are necessary for proper system operation, due care shall be taken to ensure thatadditives are replenished after alarm testing or whenever water is removed from the system.

7.7.1.7 Waterflow Detection.

7.7.1.7.1

The supply of water from sprinkler piping through auxiliary devices, circulatory piping, and pumps shallnot under any condition or operation, transient or static, cause false sprinkler waterflow signals.

7.7.1.7.2

A sprinkler waterflow signal shall not be impaired when water is discharged through an opened sprinkleror through the system test connection while auxiliary equipment is in any mode of operation (on, off,transient, stable).




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CommitteeStatement:

Sprinkler systems have become more and more specialized with multiple components being used.With the issues of compatibility rampant in our industry, connection to systems that could causefailure of individual components should be avoided. Users of the standard can refer back to


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previous editions of this design concept.

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8.3.3.1*

Sprinklers in light hazard occupancies shall be one of the following:

(1) Quick-response type as defined in 3.6.4.8 3.6.4.7

(2) Residential sprinklers in accordance with the requirements of 8.4.5

(3) Quick response CMSA sprinklers

(4) ESFR sprinklers

(5) Standard-response sprinklers used for modifications or additions to existing light hazard systemsequipped with standard-response sprinklers

(6) Standard-response sprinklers used where individual standard-response sprinklers are replaced inexisting light hazard systems




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Committee Statement

CommitteeStatement:

The standard requires the use of listed QR standard sprinklers; QR CMSA sprinklers, ESFRsprinklers or Residential sprinklers in light hazard occupancies. A listed standard response sprinklerwith a Fast Response operating element does not meet this requirement. Revised language wouldpermit mixing of QR and listed standard response sprinklers within a compartment.

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8.3.3.2

Where quick-response sprinklers are installed, all sprinklers within a compartment shall be quick-responseunless otherwise permitted in 8.3.3.3 or 8.3.3.4 .




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CommitteeStatement:

The reference to 8.3.3.4 was added to correlate to FR-85. The provisions of 8.3.3.2 should notrestrict the use of QR in-rack sprinklers in a space that includes SR sprinklers at the ceiling. In facta number of design scenarios require such an installation.

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8.3.3.5

The provisions of 8.3.3.2 shall not apply to in-rack sprinklers.




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CommitteeStatement:

The provisions of 8.3.3.2 should not restrict the use of QR in-rack sprinklers in a space thatincludes SR sprinklers at the ceiling. In fact a number of design scenarios require such aninstallation.

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8.4.1.1

Upright and pendent spray sprinklers shall be permitted in all occupancy hazard classifications andbuilding construction types unless the requirements of 8.15.1.6 apply .




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CommitteeStatement:

This is an editorial revision in that the existing statement is not true, since 8.15.1.6 does notpermit the use of standard spray sprinklers in this construction type for any occupancy hazardclassification

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First Revision No. 88-NFPA 13-2013 [ Sections 8.4.2, 8.4.3 ]

8.4.2 Sidewall Spray Sprinklers.

Sidewall sprinklers shall only be installed as follows:

(1) Light hazard occupancies with smooth, horizontal or sloped, flat ceilings

(2) Ordinary hazard occupancies with smooth, flat ceilings where specifically listed for such use

(3) To protect areas below overhead doors

8.4.3 Extended Coverage Sprinklers.

Extended coverage sprinklers shall only be installed as follows:

(1) Unobstructed In unobstructed construction consisting of flat, smooth ceilings with a slope notexceeding a pitch of 1 in 6 (a rise of 2 units in a run of 12 units, a roof slope of 16.7 percent)

(2) Unobstructed In unobstructed or noncombustible obstructed construction, where specifically listedfor such use

(3) Within trusses or bar joists having web members not greater than 1 in. (25.4 mm) maximumdimension or where trusses are spaced greater than 71⁄2 ft (2.3 m) on center and where the ceilingslope does not exceed a pitch of 1 in 6 (a rise of 2 units in a run of 12 units, a roof slope of 16.7percent)

(4) Extended coverage upright and pendent sprinklers installed under smooth, flat ceilings that haveslopes not exceeding a pitch of 1 in 3 (a rise of 4 units in a run of 12 units, a roof slope of 33.3percent), where specifically listed for such use

(5) Extended coverage sidewall sprinklers installed in accordance with 8.9.4.2.2 in slopes exceeding aceiling pitch of 2 in 12 where listed for such use

(6) In each bay of obstructed construction consisting of solid structural members that extend below thedeflector of the sprinkler

(7) Extended coverage sprinklers installed to protect areas below a single overhead door(s)




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CommitteeStatement:

There is no similar requirement for standard sidewall sprinklers to be listed for downwards flow, sothere is no need for an extended coverage sidewall sprinkler to be specially listed. Any sidewallsprinkler that can throw horizontally can most certainly also discharge downwards parallel to theslope. The revision to item (7) restricts use of EC sidewall sprinkler to protect a single overhead dooror doors as opposed to using a single EC sidewall sprinkler capable of covering the area belowmultiple doors.

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8.4.7.2* Galvanized Pipe.

8.4.7.2.1

Where steel pipe is used in preaction and dry pipe systems, piping materials shall be limited to internallygalvanized steel.

8.4.7.2.2

Black steel pipe shall be permitted when the system is installed in freezers where the air temperature isbelow 32°F (0°C) and the air supply is either nitrogen or a listed regenerative air dryer.

8.4.7.2.3

Nongalvanized fittings shall be permitted.




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Committee Statement

CommitteeStatement:

This revision is made in light of the Committee Action and Statement for Comment 13-315 fromthe previous cycle. Based on the widespread concern over corrosion, there is no reason tomandate the extra expense for galvanized pipe, since it may corrode just as rapidly as black steelpipe.

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First Revision No. 89-NFPA 13-2013 [ Section No. 8.5.5.3.1 [Excluding any

Sub-Sections] ]

Sprinklers shall be installed under fixed obstructions over 4 ft (1.2 m) wide in width .




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Committee Statement

CommitteeStatement:

In some installations observed, the sprinklers were installed off to the side of the obstruction. Thesprinklers were technically "under" the obstruction in elevation, by not positioned directly under it.Unless installed directly under the obstruction the sprinkler activation could be delayed by heat notreaching it, or from being cold-soldered by sprinklers activating at the roof.

ResponseMessage:

Public Input No. 473-NFPA 13-2013 [Section No. 8.5.5.3.1 [Excluding any Sub-Sections]]


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First Revision No. 90-NFPA 13-2013 [ New Section after 8.5.5.3.1.1 ]

8.5.5.3.1.3

Sprinklers shall not be required under noncombustible obstructions over 4 ft (1.2 m) wide where thebottom of the obstruction is 24 in. (620 mm) or less above the floor or deck.




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CommitteeStatement:

At some point it becomes ineffective to install sprinklers under obstructions that are close to thefloor. The spray pattern of the sprinkler can't develop and the fuel load is so small thatsupplemental sprinkler protection isn't necessary.

ResponseMessage:

Public Input No. 474-NFPA 13-2013 [New Section after 8.5.5.3.1.1]


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First Revision No. 91-NFPA 13-2013 [ New Section after 8.5.5.3.2 ]

8.5.5.3.3

Sprinklers installed under obstructions shall be of the same type (spray, CMSA, ESFR, residential) asinstalled at the ceiling except as permitted by 8.5.5.3.3.1 .

8.5.5.3.3.1

Quick-response spray sprinklers shall be permitted to be utilized under overhead doors.




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Committee Statement

CommitteeStatement:

Specific guidance is needed to address the type of sprinklers that are to be installedbeneath an obstruction.

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8.5.5.4 Closets.

In all closets and compartments, including those closets housing mechanical equipment, that are not

larger than 400 ft3 (11.33 m3) in size, a single sprinkler at the highest ceiling space level shall besufficient without regard to obstructions or minimum distance to the wall.




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CommitteeStatement:

The term ceiling space is vague. This section has been revised to use the term ceiling levelwhich is a more accurate descriptor.

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8.5.7.3

A sprinkler installed directly beneath a skylight not exceeding 32 ft 2 (3 m 2 ) shall measure thedistance to the ceiling to the plane of the ceiling and not to the top of the skylight.




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Committee Statement

CommitteeStatement:

This statement is needed to clarify that deflector distance of a sprinkler located under askylight is not measured to the top of the skylight.

ResponseMessage:



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First Revision No. 96-NFPA 13-2013 [ Section No. 8.6.4.1.1.3 [Excluding any

Sub-Sections] ]

The requirements of 8.6.4.1.1.1 shall not apply for light and ordinary hazard occupancies with ceilings ofnoncombustible or limited-combustible construction where either 8.6.4.1.1.3(A) or 8.6.4.1.1.3(B)applies .




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Committee Statement

CommitteeStatement:

The addition of "where the following conditions exist:" clarifies that the exception granted by8.6.4.1.1.3 is only applicable where the ceiling elevation changes. Currently, one could argue thatthe sentence of 8.6.4.1.1.3 could be taken stand-alone, thereby allowing SSU/SSP sprinklers to beinstalled an unspecified distance below a ceiling meeting the specified characteristics. This alsoclarifies that the exception is really to the "throughout the area of coverage of the sprinkler" portion of8.6.4.1.1.1, not the deflector distance limitations portion.

ResponseMessage:

Public Input No. 157-NFPA 13-2013 [Section No. 8.6.4.1.1.3 [Excluding any Sub-Sections]]


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8.6.4.1.2 Obstructed Construction.

Under obstructed construction, the sprinkler deflector shall be located in accordance with one of thefollowing arrangements:

(1) Installed with the deflectors within the horizontal planes of 1 in. to 6 in. (25.4 mm to 152 mm) belowthe structural members and a maximum distance of 22 in. (559 mm) below the ceiling/roof deck

(2) Installed with the deflectors at or above the bottom of the structural member to a maximum of 22 in.(559 mm) below the ceiling/roof deck where the sprinkler is installed in conformance with 8.6.5.1.2

(3) Installed in each bay of obstructed construction, with the deflectors located a minimum of 1 in. (25.4mm) and a maximum of 12 in. (305 mm) below the ceiling

(4) Installed with the deflectors within the horizontal planes 1 in. to 6 in. (25.4 mm to 152 mm) belowcomposite wood joists to a maximum distance of 22 in. (559 mm) below the ceiling/roof deck onlywhere joist channels are fire-stopped to the full depth of the joists with material equivalent to the web

construction so that individual channel areas do not exceed 300 ft2 (27.9 m2)

(5)




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Committee Statement

CommitteeStatement:

Concrete tees are capable of withstanding the heat long enough for sprinklers to activate evenwhen the tees are closer than 3 feet on centers.

ResponseMessage:


* Installed with deflectors of sprinklers under concrete tee construction with stems spaced less than71⁄2 ft (2.3 m) but more than 3 ft (0.91 m) on centers, regardless of the depth of the tee, located at orabove a horizontal plane 1 in. (25.4 mm) below the bottom of the stems of the tees and complyingwith Table 8.6.5.1.2


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First Revision No. 99-NFPA 13-2013 [ Section No. 8.6.4.1.4.1 ]

8.6.4.1.4.1

Sprinklers under a roof or ceiling in combustible concealed spaces of wood joist or wood trussconstruction with members less than 3 ft (0.91 m) on center and a slope having a pitch of 4 in 12 orgreater shall be quick-response.




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Committee Statement

CommitteeStatement:

This removes redundant words already used in the heading of this section. This revision doesnot result in a technical change to the standard.

ResponseMessage:



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8.6.4.1.4.2

Sprinklers under a roof or ceiling in combustible concealed spaces of wood joist or wood trussconstruction with members less than 3 ft (0.91 m) on center and a slope having a pitch of 4 in 12 orgreater shall be installed so that a row of sprinklers is installed within 12 in. (305 mm) horizontally of thepeak and between 1 in. and 12 in. (25.4 mm and 305 mm) down from the bottom of the top chordmember.




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CommitteeStatement:


ResponseMessage:



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8.6.4.1.4.3

Sprinklers under a roof or ceiling in combustible concealed spaces of wood joist or wood trussconstruction with members less than 3 ft (0.91 m) on center and a slope having a pitch of 4 in 12 orgreater shall be installed so that the sprinklers installed along the eave are located not less than 5 ft (1.52m) from the intersection of the upper and lower truss chords or the wood rafters and ceiling joists.




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CommitteeStatement:


ResponseMessage:



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8.6.4.1.4.5

The requirements of 8.6.4.1.4.4 shall not apply to sprinklers installed at the corner of the eave of a hiptype roof where located not less than 5 ft (1.52 m) from the intersection of the upper and lower trusschords or the wood rafters and ceiling joists.




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Committee Statement

CommitteeStatement:

New 8.6.4.1.4.4.1 allows an attic to be protected without having to apply the minimum of 20-psirequirement for the one sprinkler located at the corner of an eave of a hip type roof. The issue is notthat the corner is inadequately protected. The minimum spacing from the intersection of the upperand bottom of the truss chords causes the sprinkler end head pressure to be a minimum of 20 psi.The head spacing over 8 ft but less than 10 ft is critical for sprinklers located at the peak. Thespacing is less critical along the eave and should not impose a 20 psi minimum end head pressurefor sprinklers at the peak spaced 8 ft or less.

ResponseMessage:



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8.6.4.1.4.4

Sprinklers under a roof or ceiling in combustible concealed spaces of combustible wood joist or woodtruss construction with members less than 3 ft (0.91 m) on center and a slope having a pitch of 4 in 12 orgreater, and using standard spray sprinklers, installed where the dimension perpendicular to the slopeexceeds 8 ft (2.4 m), shall have a minimum pressure of 20 psi (1.4 bar).




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CommitteeStatement:


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8.6.4.1.4.6

The special requirements of 8.6.2.2.1 and 8.6.4.1.4for sprinklers under a roof or ceiling in combustibleconcealed spaces of wood joist or wood truss construction with members less than 3 ft (0.91 m) on centerand a slope having a pitch of 4 in 12 or greater shall not apply when the exposed combustible sheathingin the roof or ceiling space are constructed of pressure impregnated fire-retardant treated fire retardant–treated wood as defined by NFPA 703.




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CommitteeStatement:


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8.6.5.1.2*


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Sprinklers shall be arranged to comply with one of the following arrangements:

(1) Subsection 8.5.5.2, Table 8.6.5.1.2, and Figure 8.6.5.1.2(a) shall be followed.

(2) Sprinklers shall be permitted to be spaced on opposite sides of obstructions not exceeding 4 ft (1.2 m) inwidth, provided the distance from the centerline of the obstruction to the sprinklers does not exceedone-half the allowable distance permitted between sprinklers.

(3) Obstructions located against the wall and that are not over 30 in. (762 mm) in width shall be permitted tobe protected in accordance with Figure 8.6.5.1.2(b) .

(4) Obstructions located against the wall and that are not over 24 in. (610 mm) in width shall be permitted tobe protected in accordance with Figure 8.6.5.1.2(c). The maximum distance between the sprinkler andthe wall shall be measured from the sprinkler to the wall behind the obstruction and not to the face of theobstruction.

Table 8.6.5.1.2 Positioning of Sprinklers to Avoid Obstructions to Discharge [Standard SprayUpright/Standard Spray Pendent (SSU/SSP)]

Distance from Sprinklersto

Side of Obstruction (A)

Maximum Allowable Distance of Deflector Above Bottom of Obstruction(B) (in.)

Less than 1 ft 0

1 ft to less than 1 ft 6 in. 21⁄2

1 ft 6 in. to less than 2 ft 31⁄2




3 ft 6 in. to less than 4 ft 12

4 ft to less than 4 ft 6 in. 14







For SI units, 1 in. = 25.4 mm; 1 ft = 0.3048 m.

Note: For A and B, refer to Figure 8.6.5.1.2(a).

Figure 8.6.5.1.2(a) Positioning of Sprinkler to Avoid Obstruction to Discharge (SSU/SSP).


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Figure 8.6.5.1.2(b) Obstruction Against Wall (SSU/SSP).

Figure 8.6.5.1.2(c) Obstructions Against Walls (SSU/SSP).


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File Name DescriptionFR_105.pdf Fig 8.6.5.1.2 (c)




Street Address:City:State:Zip:Submittal Date: Wed Aug 21 15:57:20 EDT 2013

Committee Statement and Meeting Notes

CommitteeStatement:

It is not necessary to require an obstruction against a wall to more than 18“ below the deflector. If it isless than 18” then it is just a smaller obstruction to the sprinkler spray. The requirement for anobstruction to be 18” below a sprinkler deflector is not relevant in the situation presented in theseillustrations. Further, the distance of the sprinkler from the wall should be limited to one half (½ S) of theallowable sprinkler spacing (S).

ResponseMessage:Public Input No. 289-NFPA 13-2013 [Section No. 8.6.5.1.2]


5 of 5 11/7/2013 1:00 PM


8.6.5.3.6

The deflector of automatic sprinklers installed under fixed obstructions shall be positioned no more than12 in. (305 mm) below the bottom of the obstruction.




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Committee Statement

CommitteeStatement:

Because no specific guidance is given in the standard, automatic sprinklers are being installedwith their deflectors more than 12 inches below open grate mezzanines and large ducts such thatactuation over a developing fire is unlikely. This language provides specific guidance on this issue.

ResponseMessage:



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8.6.5.3.7

Sprinklers installed under round ducts shall be of the intermediate level/rack storage type or otherwiseshielded from the discharge of overhead sprinklers.




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Committee Statement

CommitteeStatement:

Round ductwork over 4 ft in diameter presents a special problem. Operating sprinklers locatedabove the ducts will discharge water onto the duct, and surface tension will cause the water to clingto the outside surface of the duct. Much of the discharge is expected to flow around the duct, andthen impinge upon the sprinkler that is located below the duct. This would cool the operating elementof the sprinkler, making actuation over a developing fire unlikely. By requiring that sprinklers locatedbelow round duct in excess of 4 ft in diameter be shielded from the discharge of overhead sprinklers,these sprinklers should be able to function properly in a fire situation.

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8.6.6.2.1

Where shelving is installed on a wall and is not directly below sprinklers, the shelves, including storagethereon, shall be permitted to extend above the level of a plane located 18 in. (457 mm) below ceilingsprinkler deflectors.




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Committee Statement

CommitteeStatement:

This section of the code is improperly worded. The intent of the section is to permit the storageto be within 18 inches of the sprinkler, not require it.

ResponseMessage:




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8.7.4.1.4* Soffits and Cabinets.

Where soffits are used for the installation of sidewall sprinklers, the sprinklers and soffits shall beinstalled in accordance with 8.7.4.1.4.1 , 8.7.4.1.4.2 , or 8.7.4.1.4.3 .

8.7.4.1.4.1

Where soffits exceed more than 8 in. (203 mm) in width or projection from the wall, pendent sprinklersshall be installed under the soffit.

8.7.4.1.4.2

Sidewall sprinklers shall be permitted to be installed in the face of a soffit located directly over cabinets,without requiring additional sprinklers below the soffit or cabinets, where the soffit does not projecthorizontally more than 12 in. (305 mm) from the wall.

8.7.4.1.4.3

Where sidewall sprinklers are more than 3 ft (0.91 m) above the top of cabinets, the sprinkler shall bepermitted to be installed on the wall above the cabinets where the cabinets are no greater than 12 in.(305 mm) from the wall.



A.8.7.4.1_FR110.docx




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Committee Statement

CommitteeStatement:

Employee break rooms are similar to kitchens in residential dwelling units. This allows the sameguidance for standard spray sidewalls as allowed for extended coverage sprinklers in 8.9.4.1.4and residential sprinklers in 8.10.7.1.5.

ResponseMessage:



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A.8.7.4.1.4 The requirements in 8.7.4.1.4 were developed from years of experience with NFPA 13 obstruction requirements and an additional test series conducted by the National Fire Sprinkler Association with the help of Tyco International (Valentine and Isman, Kitchen Cabinets and Residential Sprinklers, National Fire Sprinkler Association, November 2005), which included fire modeling, distribution tests, and full-scale fire tests. The test series showed that pendent sprinklers definitely provide protection for kitchens, even for fires that start under the cabinets. The information in the series was less than definitive for sidewall sprinklers, but distribution data show that sprinklers in the positions in this standard provide adequate water distribution in front of the cabinets and that sidewall sprinklers should be able to control a fire that starts under the cabinets. When protecting kitchens or similar rooms with cabinets, the pendent sprinkler should be the first option. If pendent sprinklers cannot be installed, the next best option is a sidewall sprinkler on the opposite wall from the cabinets, spraying in the direction of the cabinets. The third best option is the sidewall sprinkler on the same wall as the cabinets, on a soffit flush with the face of the cabinet. The last option should be putting sprinklers on the wall back behind the face of the cabinet because this location is subject to being blocked by items placed on top of the cabinets. It is not the intent of the committee to require sprinklers under kitchen cabinets.


8.7.4.1.3.2*

Where soffits used for the installation of sidewall sprinklers are less than or equal to 8 in. (203 mm) inwidth or projection from the wall, additional sprinklers shall not be required below the soffit when thesidewall sprinkler is installed on the soffit is within 4 in. (102 mm) from the bottom of the soffit .




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Committee Statement

CommitteeStatement:

When the 8-inch rule was originally accepted, the idea was not to get direct water spray from thesprinkler back behind the soffit. The idea was to define a small area where direct water spray wouldnot be necessary and a curtain of water would drop straight down from the soffit preventing firespread beyond the 8-inch width space. There are times when the sprinkler cannot be located within4 inches of the bottom of a soffit and there is no need to put a pendent sprinkler under such a skinnyobject.

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8.8.3.4.2

Sprinklers shall be permitted to be placed less than 6 ft (1.8 m) 8 ft (2.4 m) on center where the followingconditions are satisfied:

(1) Baffles shall be arranged to protect the actuating elements.

(2) Baffles shall be of solid and rigid material that will stay in place before and during sprinkler operation.

(3) Baffles shall be not less than 8 in. (203 mm) long and 6 in. (152 mm) high.

(4) The tops of baffles shall extend between 2 in. and 3 in. (51 mm and 76 mm) above the deflectors ofupright sprinklers.

(5) The bottoms of baffles shall extend downward to a level at least even with the deflectors of pendentsprinklers.




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Committee Statement

CommitteeStatement:

The change would fix a typographical error which creates an inconsistency in this sectionof the code.

Response Message:



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First Revision No. 113-NFPA 13-2013 [ Section No. 8.8.4.1.1.4(B) ]

(B)*

Where the distance between the upper ceiling and the sprinkler deflector is less than or equal to 36 in.(914 mm), the sprinklers shall be permitted to be spaced as though the ceiling were flat, provided theobstruction rules and ceiling pocket rules are observed are observed .




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Committee Statement

CommitteeStatement:

The ceiling pocket rules are not pertinent to this guidance. This change matches the currenttext in 8.6.4.1.1.4 (B).

ResponseMessage:

Public Input No. 253-NFPA 13-2013 [Section No. 8.8.4.1.1.4(B)]


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8.8.4.1.2 Obstructed Construction.

Under obstructed construction, the sprinkler deflector shall be located in accordance with one of thefollowing arrangements:

(1) Installed with the deflectors within the horizontal planes of 1 in. to 6 in. (25.4 mm to 152 mm) belowthe noncombustible structural members and a maximum distance of 22 in. (559 mm) below theceiling/roof deck

(2) Installed with the deflectors at or above the bottom of the noncombustible structural member to amaximum of 22 in. (559 mm) below the noncombustible ceiling/roof deck where the sprinkler isinstalled in conformance with 8.8.5.1.2

(3) Installed in each bay of combustible or noncombustible obstructed construction, with the deflectorslocated a minimum of 1 in. (25.4 mm) and a maximum of 12 in. (305 mm) below the ceiling

(4) Installed in accordance with their listing where sprinklers are listed for use under other ceilingconstruction features or for different distances




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Committee Statement

CommitteeStatement:

This provides a reminder that this section applies to noncombustible obstructed constructionper 8.4.3(2) in nos. (1) and (2).

ResponseMessage:



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Committee Statement

CommitteeStatement:

This new section provides language on how to position the deflector where sprinklers areinstalled under slightly sloped roofs. This language parallels section 8.6.4.2 regarding upright andpendent standard spray sprinklers.

ResponseMessage:



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8.8.5.1.2*


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Sprinklers shall be arranged to comply with one of the following arrangements:

(1) Sprinklers shall be in accordance with 8.5.5.2, Table 8.8.5.1.2, and Figure 8.8.5.1.2(a) .

(2) Sprinklers shall be permitted to be spaced on opposite sides of obstructions not exceeding 4 ft (1.2m) in width provided the distance from the centerline of the obstruction to the sprinklers does notexceed one-half the allowable distance permitted between sprinklers.

(3) Obstructions located against the wall and that are not over 30 in. (762 mm) in width shall bepermitted to be protected in accordance with Figure 8.8.5.1.2(b).

(4) Obstructions located against the wall and that are not over 24 in. (610 mm) in width shall bepermitted to be protected in accordance with Figure 8.8.5.1.2(c). The maximum distance betweenthe sprinkler and the wall shall be measured from the sprinkler to the wall behind the obstruction andnot to the face of the obstruction.

Table 8.8.5.1.2 Position of Sprinklers to Avoid Obstructions to Discharge (Extended Coverage Uprightand Pendent Spray Sprinklers)

Distance from Sprinklersto


Maximum Allowable Distance of Deflector Above Bottom ofObstruction (B) (in.)

Less than 1 ft 0




















Note: For A and B, refer to Figure 8.8.5.1.2(a).

Figure 8.8.5.1.2(a) Position of Sprinkler to Avoid Obstruction to Discharge (Extended CoverageUpright and Pendent Spray Sprinklers).


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Figure 8.8.5.1.2(b) Obstructions Against Walls (Extended Coverage Upright and Pendent SpraySprinklers).

Figure 8.8.5.1.2(c) Obstructions Against Walls (Extended Coverage Upright and Pendent SpraySprinklers).


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Street Address:

City:

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Committee Statement

CommitteeStatement:

It is not necessary to require an obstruction against a wall to more than 18“ below the deflector. If itis less than 18” then it is just a smaller obstruction to the sprinkler spray. The requirement for anobstruction to be 18” below a sprinkler deflector is not relevant in the situation presented in theseillustrations. Further, the distance of the sprinkler from the wall should be limited to one half (½ S) of


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the allowable sprinkler spacing (S).

ResponseMessage:


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8.8.5.3.5

The deflector of automatic sprinklers installed under fixed obstructions shall be positioned no more than12 in. (305 mm) below the bottom of the obstruction.




Street Address:

City:

State:

Zip:


Committee Statement

CommitteeStatement:

Because no specific guidance is given in the standard, automatic sprinklers are being installedwith their deflectors more than 12 inches below open grate mezzanines and large ducts such thatactuation over a developing fire is unlikely.

ResponseMessage:



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8.8.5.3.6

Sprinklers installed under round ducts shall be of the intermediate level/rack storage type or otherwiseshielded from the discharge of overhead sprinklers.




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CommitteeStatement:


ResponseMessage:



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8.9.4.1.3.1*

Where soffits used for the installation of sidewall sprinklers are less than or equal to 8 in. (203 mm) inwidth or projection from the wall, additional sprinklers shall not be required below the soffit when thesidewall sprinkler on the soffit is within 4 in. (102 mm) from the bottom of the soffit .




Street Address:

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Committee Statement

CommitteeStatement:

When the 8-inch rule was originally accepted, the idea was not to get direct water spray from thesprinkler back behind the soffit. The idea was to define a small area where direct water spray wouldnot be necessary and a curtain of water would drop straight down from the soffit preventing firespread beyond the 8-inch width space. There are times when the sprinkler cannot be located within4 inches of the bottom of a soffit and there is no need to put a pendent sprinkler under such a skinnyobject.

ResponseMessage:



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8.9.5.1.3

The distance between light fixtures or similar obstructions located more than 8 ft (2.4 m) from the sprinklershall be in conformance with Table 8.9.5.1.3 and Figure 8.9.5.1.3.

Table 8.9.5.1.3 Positioning of Sprinklers to Avoid Obstructions (Extended Coverage Sidewall SpraySprinklers)

Distance from Sidewall Sprinkler to Sideof Obstruction (A)

Maximum Allowable Distance of Deflector AboveBottom of Obstruction (B) (in.)

Less than 8 ft Not allowed

8 ft to less than 10 ft 1








17 ft or greater 14


Note: For A and B, refer to Figure 8.9.5.1.3.

Figure 8.9.5.1.3 Positioning of Sprinkler to Avoid Obstruction (Extended Coverage SidewallSpray Sprinklers).




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8-9-5-1-3.jpg 8.9.5.1.3




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Committee Statement

CommitteeStatement:

Figure 8.7.5.1.3 attempts to clarify two issues with respect to the beam rule and sidewall sprinklers.First, that when sprinkler spray needs to get under an obstruction, there needs to be some clearspace above the sprinkler deflector. Too many people using NFPA 13 think that the obstructions atthe same elevation as the deflector are acceptable (which would be true for pendent and uprightsprinklers). But sidewall sprinklers need 4 inches of clear space above the deflector as well. Thesecond concern is a clarification of the type of obstruction applicable to this rule. Skinny obstructionsthat meet the "four-times rule" should not have to worry about water spray only going under theobstruction. In this case, the four-times rule should be sufficient for sprinkler spray patterns todevelop. A 4 inch wide light fixture is not going to be any worse than a 4 inch wide column using thefour-times rule.Unlike SSW, EC sidewalls require an arc spray discharge to reach the entire hazard)

ResponseMessage:



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8.9.5.1.5 Isolated Obstructions.

Isolated obstructions projecting from the same wall as the one on which the extended coverage sidewallsprinkler is mounted shall be located a minimum of 6 in. (152 mm) from the sidewall sprinkler.




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Committee Statement

CommitteeStatement:

In 2007, the committee added a 4" distance requirement for standard sidewall sprinklers to belocated from isolated obstructions on the same wall, such as smoke detectors and horn/strobes, butdid not address the same requirement for extended coverage sidewall sprinklers. Guidance is nowprovided for positioning extended coverage sidewall sprinklers away from isolated obstructions onthe same wall to ensure adequate wall wetting behind the sprinkler.

ResponseMessage:



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First Revision No. 121-NFPA 13-2013 [ Sections 8.9.5.1.4, 8.9.5.1.5 ]


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8.9.5.1.4


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Continuous obstructions projecting from the same wall as the one on which the sidewall sprinkler ismounted shall be in accordance with Table 8.9.5.1.4 and Figure 8.9.5.1.4 . one of the followingarrangements:

(1) Sprinklers shall be installed in accordance with Table 8.9.5.1.4 and Figure 8.9.5.1.4(a) .

(2) Sprinklers shall be permitted to be spaced on opposite sides of obstructions less than 4 ft (1.22 m)in width where the distance from the centerline of the obstruction to the sprinklers does not exceedone-half the allowable distance between sprinklers.

(3) Obstructions located against the wall and that are not over 30 in. (762 mm) in width shall bepermitted to be protected in accordance with Figure 8.9.5.1.4(b) .

(4) Obstructions located against the wall and that are not over 24 in. (610 mm) in width shall bepermitted to be protected in accordance with Figure 8.9.5.1.4(c) . The maximum distance betweenthe sprinkler and the wall shall be measured from the sprinkler to the wall behind the obstructionand not to the face of the obstruction.

Table 8.9.5.1.4 Positioning of Sprinklers to Avoid Obstructions Along Wall (Extended Coverage SidewallSpray Sprinklers)



Less than 1 ft 6 in. 0









Note: For A and B, refer to Figure 8.9.5.1.4 Figure 8.9.5.1.4(a) .

Figure 8.9.5.1.4(a) Positioning of Sprinkler to Avoid Obstruction Along Wall (Extended CoverageSidewall Spray Sprinklers).

Figure 8.9.5.1.4(b) Obstruction Against Wall (Standard Sidewall Spray Sprinklers).


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Figure 8.9.5.1.4(c) Obstruction Against Wall (Standard Sidewall Spray Sprinklers).

8.9.5.1.6

Sprinklers shall be permitted to be spaced on opposite sides of obstructions less than 4 ft (1.22 m) inwidth where the distance from the centerline of the obstruction to the sprinklers does not exceedone-half the allowable distance between sprinklers.



FR_121_8-9-5-1-4.tiff Figures b and c




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Committee Statement

CommitteeStatement:

For obstructions to the side of extended coverage sidewall sprinklers, the same four optionsshould apply as when dealing with extended coverage upright and pendent sprinklers. Thislanguage parallels section 8.8.5.1.2 and provides the same 4 options in a user friendly format.

ResponseMessage:

Public Input No. 373-NFPA 13-2013 [Sections 8.9.5.1.4, 8.9.5.1.5]


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First Revision No. 122-NFPA 13-2013 [ Sections 8.9.5.2.1.3, 8.9.5.2.1.4 ]

8.9.5.2.1.3*

Unless the requirements of 8.9.5.2.1.4 through 8.9.5.2.1.5 8.9.5.2.1.6 are met, sprinklers shall bepositioned away from obstructions a minimum distance of four times the maximum dimension of theobstruction (e.g., truss webs and chords, pipe, columns, and fixtures). The maximum clear distancerequired shall be 36 in. (914 mm) from the sprinkler. in accordance with Figure 8.9.5.2.1.3 .

Figure 8.9.5.2.1.3 Minimum Distance from Obstruction (Extended Coverage Sidewall).

8.9.5.2.1.4

Sidewall sprinklers shall be positioned in accordance with Figure 8.9.5.2.1.4 when obstructions arepresent.

Figure 8.9.5.2.1.4 Minimum Distance from Obstruction (Extended Coverage Sidewall).




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Committee Statement

CommitteeStatement:

Recent fire testing has shown that there may be an issue with the maximum 36 inch dimension.The sprinkler can be too close to some large obstructions allowing substantial dry area behindlarge objects like big columns.

ResponseMessage:

Public Input No. 339-NFPA 13-2013 [Sections 8.9.5.2.1.3, 8.9.5.2.1.4]


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8.10.2.2

Residential sprinklers shall not be permitted to be used on ceilings with slopes greater than 8 in 12 orceiling with heights greater than 24 ft unless specifically listed for this purpose.




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Committee Statement

CommitteeStatement:

The requirement for residential sprinklers to be listed for use on a slope was in the 2010 andprevious editions of NFPA 13. It was eliminated during the 2013 revision cycle due to testing, but thattesting was limited to ceilings with slopes of 8 in 12 and heights of 24 ft. In situations where theceiling exceeds these limits, residential sprinklers still need to be specially listed for the steep slope,or residential sprinklers should not be used. NFPA 13 allows the use of quick response sprinklers inresidential occupancies (as light hazard) and these sprinklers are more applicable to steeply pitchedsituations due to the known design area increases already incorporated into Chapter 11.

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8.10.4.7 Deflector Orientation (Residential Upright and Pendent Spray).

8.10.4.7.1

Unless the requirements of 8.10.4.7.2 or 8.10.4.7.3 are met, deflectors of upright and pendentsprinklers shall be aligned parallel to ceilings, roofs, or the incline of stairs.

8.10.4.7.2

Where upright or pendent sprinklers are installed at the peak below a sloped ceiling or roof surface, thesprinkler shall be installed with the deflector horizontal.

8.10.4.7.3

Roofs and ceilings having a pitch not exceeding 2 in 12 (16.7 percent) are considered horizontal in theapplication of 8.10.4.7 , and upright and pendent sprinklers shall be permitted to be installed withdeflectors horizontal.




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Committee Statement

CommitteeStatement:

Guidance has been added on upright and pendent residential sprinkles and the deflectororientation under the ceiling or roof. While section 8.5 provides some general guidance, morespecific information is needed that parallels 8.6.4.2.

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8.10.7.1.3

The distance between light fixtures or similar obstructions located more than 8 ft (2.4 m) from the sprinklershall be in conformance with Table 8.10.7.1.3 and Figure 8.10.7.1.3.

Table 8.10.7.1.3 Positioning of Sprinklers to Avoid Obstructions (Residential Sidewall Sprinklers)



Less than 8 ft Not allowed









17 ft or greater 14


Note: For A and B, refer to Figure 8.10.7.1.3.

Figure 8.10.7.1.3 Positioning of Sprinkler to Avoid Obstruction (Residential Sidewall Sprinklers).


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8-10-7-1-3.jpg 8.10.7.1.3




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Committee Statement

CommitteeStatement:

The new Figure 8.10.7.1.3 attempts to clarify two issues with respect to the beam rule and sidewallsprinklers. First, that when sprinkler spray needs to get under an obstruction, there needs to be someclear space above the sprinkler deflector. Too many people using NFPA 13 think that the obstructionsat the same elevation as the deflector are acceptable (which would be true for pendent and uprightsprinklers). But sidewall sprinklers need 4 inches of clear space above the deflector as well. Thesecond concern is a clarification of the type of obstruction applicable to this rule. Skinny obstructionsthat meet the "four-times rule" should not have to worry about water spray only going under theobstruction. In this case, the four-times rule should be sufficient for sprinkler spray patterns todevelop. A 4 inch wide light fixture is not going to be any worse than a 4 inch wide column using thefour-times rule.

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8.10.7.1.4


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Obstructions Continuous obstructions projecting from the same wall as the one on which the sidewallsprinkler is mounted shall be in accordance with Table 8.10.7.1.4 and Figure 8.10.7.1.4 . one of thefollowing arrangements:

(1) Sprinklers shall be in accordance with Table 8.10.7.1.4 and Figure 8.10.7.1.4(a) .

(2) Sprinklers shall be permitted to be spaced on opposite sides of obstructions less than 4 ft (1.22 m)in width where the distance from the centerline of the obstruction to the sprinklers does not exceedone-half the allowable distance between sprinklers.

(3) Obstructions located against the wall and that are not over 30 in. (762 mm) in width shall bepermitted to be protected in accordance with Figure 8.10.7.1.4(b) .

(4) Obstructions located against the wall and that are not over 24 in. (610 mm) in width shall bepermitted to be protected in accordance with Figure 8.10.7.1.4(c) . The maximum distancebetween the sprinkler and the wall shall be measured from the sprinkler to the wall behind theobstruction and not to the face of the obstruction.

Table 8.10.7.1.4 Positioning of Sprinklers to Avoid Obstructions Along Wall (Residential SidewallSprinklers)

Distance from Sidewall

Sprinkler to


Maximum Allowable Distance of Deflector Above Bottom of

Obstruction (B) (in.)

Less than 1 ft 6 in. 0









Note: For A and B, refer to Figure 8.10.7.1.4 Figure 8.10.7.1.4(a) .

Figure 8.10.7.1.4(a) Positioning of Sprinkler to Avoid Obstruction Along Wall (ResidentialSidewall Sprinklers).

Figure 8.10.7.1.4(b) Obstruction Against Wall (Standard Sidewall Spray Sprinklers).


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Figure 8.10.7.1.4(c) Obstruction Against Wall (Standard Sidewall Spray Sprinklers).



FR_126_8-10-7-1-4.tiff Figs b and c




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Committee Statement

CommitteeStatement:

For obstructions to the side of residential sidewall sprinklers, the same four options should applyas when dealing with pendent residential sprinklers. This language parallels section 8.10.6.1.2and provides the same 4 options in a user friendly format.

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8.10.7.3.5

The deflector of automatic sprinklers installed under fixed obstructions shall be positioned below thebottom of the obstruction in accordance with their listed distance below ceilings.




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CommitteeStatement:

Because no specific guidance is given in the standard, automatic sprinklers are being installedwith their deflectors located below obstructions in accordance with the listed dimensions for thedistance from the ceiling.

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8.10.7.3.6

Sprinklers installed under round ducts shall be shielded from the discharge of overhead sprinklers.




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8.11.2.2.2

In any case, the maximum area of coverage of any sprinkler shall not exceed 130 ft2 (12.9 m2).




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Committee Statement

Committee Statement: Inconcistent ( and incorrect) metric conversion.

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Committee Statement

CommitteeStatement:

Third party testing indicates that openings of 75% are acceptable. It is a common question as tohow many small obstructions can be near each other before they are considered one obstruction tothe sprinkler discharge. As ESFR sprinklers are sensitive to obstructions, guidance is needed onacceptable distances between these small obstructions. This is thought to be a conservativeseparation value.

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8.15.1.2.8

Concealed spaces within wood joist construction and composite wood joist construction havingnoncombustible insulation filling the space from the ceiling up to the bottom edge of the joist of the roof orfloor deck, provided that in composite wood joist construction the joist channels are firestopped separated

into volumes each not exceeding 160 ft3 (4.53 m3) to the full depth of the composite wood joist withmaterial equivalent to the web construction, shall not require sprinkler protection.




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Committee Statement

CommitteeStatement:

By using the word firestop, many AHJ's are requiring a UL assembly to seal any penetrationsthrough the joists. Since the joists are fiber board wood and rather combustible, there are not manyreadily available through penetration details. It is more logical to use the term sealed vs. firestopped.The addition of composite wood joist was intended to clarify that this section is only intended forcomposite wood joists, not all wood joists. The language previously referred to firestopping whichwas not the intent for this section. Firestopping is a defined term in many model codes and requires ahigher level of separation than what was intended. This section is simply attempting to createseparation.

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Sub-Sections] ]

Concealed spaces formed by noncombustible or limited-combustible ceilings suspended from the bottomof wood joists and composite wood joists with a maximum nominal chord width of 2 in. (50.8 mm), wherejoist spaces are full of noncombustible batt insulation with a maximum 2 in. (50.8 m) air space between theroof decking material and the top of the batt insulation shall not require sprinklers.



FR-140_Updated_A._8.15.1.2.17.docx Updated Annex Image




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CommitteeStatement:

The term roof has been removed. This implies that this exception only applies to a top floor orroof condition. Updated the annex figure to clarify that it is the facing that needs to be non- orlimited-combustible.

ResponseMessage:

Public Input No. 132-NFPA 13-2013 [Section No. 8.15.1.2.17 [Excluding any Sub-Sections]]


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With Facing


8.15.1.2.18.1

Sprinklers shall be permitted to be omitted from within combustible soffits, eaves, overhangs, anddecorative frame elements that are constructed in accordance with 8.15.1.2.18.2 through8.15.1.2.18.5 .




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Committee Statement

CommitteeStatement:

This is text that was originally included in the 2010 version when these provisions were firstadded. The charging text to allow for sprinklers to be omitted should have been retained.

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First Revision No. 144-NFPA 13-2013 [ Section No. 8.15.1.6 [Excluding any

Sub-Sections] ]

Sprinklers used in horizontal combustible concealed spaces (with a slope not exceeding 2 in 12) withcombustible wood truss, wood joist construction, or bar joist construction having a combustible uppersurface and where the depth of the space is less than 36 in. (914 mm) from deck to deck, from deck toceiling, or with double wood joist construction with a maximum of 36 in. (914 mm) between the top of thebottom joist and the bottom of the upper joist shall be listed for such use.




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Committee Statement

CommitteeStatement:

Guidance was added to determine the points within the concealed space for measurements.Currentsection 8.15.1.7 was added in the 2007 edition to extend the application of listed special concealedspace sprinklers to permit their use in the case where the distance is not more than 36” between thebottom and top of the joists in the double composite joist construction. At the time, the Committeeagreed to introduce this change to provide protection options for composite wood joist constructionthat had not previously been addressed.

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8.15.1.6.2

Sprinklers specifically listed to provide protection of combustible concealed spaces described in8.15.1.6 shall be permitted to be used in accordance with 8.3.1.2 throughout the area when a portionof the area exceeds a depth of 36 in. (914 mm).




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Committee Statement

CommitteeStatement:

It is not uncommon for a long space or when depths start at close to 36 inches where the allowedslope causes the depth to exceed 36 inches. The manufacturer cut-sheets indicate that the listedsprinklers cannot be used beyond 36 inches whereas it seems the intent should be that thesprinklers must be used for depths less than 36 without limiting their use when the depth alsoexceeds this value.

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8.15.1.6.1

Sprinklers specifically listed to provide protection of combustible concealed spaces described in 8.15.1.6shall be permitted to be used in accordance with 8.3.1.2 where the space is less than 12 in. (305 mm)from deck to deck or deck to ceiling .




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Committee Statement

CommitteeStatement:

The term deck to ceiling was added so that this section is congruent with the revision to 8.15.1.6via FR 144.The added reference to Section 8.3.1.2 is to close the loop by cross-referencing back tothe provision that allows for application of listed sprinklers beyond their listing for different . This isconsistent with the current text in 8.15.1.6.1.

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8.15.1.7

Sprinklers specifically listed to provide protection of combustible concealed spaces described in 8.15.1.6shall be permitted to be used in accordance with 8.3.1.2 to protect composite wood joist constructionwith a maximum of 36 in. (914 mm) from deck to deck, from deck to ceiling, or with double compositewood joist construction with a maximum of 36 in. (914 mm) between the top of the bottom joist and thebottom of the upper joist.




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Committee Statement

CommitteeStatement:

Current section 8.15.1.7 was added in the 2007 edition to extend the application of listed specialconcealed space sprinklers to permit their use in the case where the distance is not more than 36”between the bottom and top of the joists in the double composite joist construction. At the time, theCommittee agreed to introduce this change to provide protection options for composite wood joistconstruction that had not previously been addressed.

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8.15.7.2*

Sprinklers shall be permitted to be omitted where the exterior canopies, roofs, porte-cocheres, balconies,decks, and similar projections are constructed with materials that are noncombustible, limited-combustible, or fire retardant–treated wood as defined in NFPA 703, Standard for Fire Retardant-TreatedWood and Fire-Retardant Coatings for Building Material , or where the projections are constructedutilizing a noncombustible frame, limited-combustibles, or fire retardant–treated wood with an inherentlyflame-resistant fabric overlay as demonstrated by Test Method 2 in accordance with NFPA 701 ,Standard Methods of Fire Tests for Flame Propagation of Textiles and Films .




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Committee Statement

CommitteeStatement:

As currently written, fabric canopies that are attached to buildings do not meet the constructionrequirements if the sprinklers are to be omitted in these areas, therefore, it must be assumed that allexterior fabric canopies must be sprinkler protected. If the fabric has been tested in accordance withtest method 2 of NFPA 701, it has been demonstrated that flame propagation is not sustained andthat there is no degradation to the material's flame resistant properties due to anticipated exposuresand based on these findings, it is evident that these projections present very little, if any, hazard andcan therefore be added to the list of permitted sprinkler omissions.

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8.15.8.1.1*

Sprinklers Unless sprinklers are required by 8.15.8.1.2 or 8.15.8.1.3 , sprinklers shall not be required in

bathrooms that are located within dwelling units of hotels and motels , that do not exceed 55 ft2 (5.1 m2)in area, and that have walls and ceilings of noncombustible or limited-combustible materials with a15-minute thermal barrier rating, including the walls and ceilings behind any shower enclosure or tub.




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Committee Statement

CommitteeStatement:

This revision reinstates the sprinkler exception that was recently deleted in the 2013 edition of NFPA13 from Section 8.15.8.1.1. The NFPA 13 AUT-SSI Committee accepted a code proposal to delete thisapartment dwelling unit sprinkler exception that has been in its standard since the 1991 edition ofNFPA 13. The original code proposal, as well as the public comment that the AUT-SSI Committeeaccepted to delete this bathroom sprinkler exception, provided no technical fire data andsubstantiation to delete this exception for apartment bathrooms in dwelling units. In addition, thedeletion of this exception will have an adverse affect on the retrofitting of existing high-rise apartmentbuildings with sprinklers. During the 2010 NFPA 13 code process, the AUT-SSI Committee attemptedto delete this same exception, but the NMHC submitted a CAM that was approved by the membershipat the Annual Technical Meeting in Chicago that reinstated the exception. This bathroom exceptionhas been in NFPA Codes (first placed NFPA 101 and then moved to NFPA 13) for over 34 years withno adverse fire protection or life safety issues. The apartment dwelling unit sprinkler exception wasoriginal in the 1976 edition of NFPA 101, and was only removed from the NFPA 101 editions after1991 because of the informal understanding between the NFPA 101 Residential Subcommittee andNFPA 13 Committee that sprinkler contractors would rather have such an exception in NFPA 13 so itwould not be missed during the bidding, design and installation process. The NFPA Fire Data Report,“1582-Area of Origin in Reported Apartment Fires 2004-2008,” dated January 2011, that clearlyprovides fire data showing that fires in bathrooms in sprinklered apartments building are small innumber, with limited property loss, and have not caused any fire deaths. In this report for the latest firedata (2004-2008 annual averages): 1. Table 3, "Apartment fires in Which Sprinklers were Present, byArea of Origin", that include fire data for both NFPA 13 & NFPA 13R systems, bathrooms firesaccounted for only 300 (1%) fires out of a total of 18,200/year fires in such buildings, with 0 deaths outof 17 deaths/year, with 7 injuries (2%) out of 399/year, with a total direct property loss of $1 million(2%) out of $71 million/year . 2. Table 20, "Apartment Buildings of Five or More Stories in WhichSprinklers were Present, by Area of Origin", that would be only apartment buildings sprinklered inaccordance with NFPA 13 systems (NFPA 13R systems are limited to buildings up to 4 stories inheight), bathrooms fires accounted for only 80 (1%) fires out of a total of 6,070/year fires in suchbuildings, with 0 deaths out of 9 deaths/year, with 1 injury (1%) out of 129/year, with a total directproperty loss of $0 out of $11 million/year. 3. Table 22, "Apartment Buildings of Five or More Stories inWhich Sprinklers were Present and Flame Damage Spread beyond the Room of Origin, by Area ofOrigin", that would be only apartment buildings sprinklered in accordance with NFPA 13 systems(NFPA 13R systems are limited to buildings up to 4 stories in height), bathrooms fires accounted foronly 1 (1%) fires out of a total of 72/year fires in such buildings, with 0 deaths out of 2 deaths/year,with 0 injuries out of 21/year, with a total direct property loss of $0 out of $3 million/year. Based on


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NFPA fire data there is no rational reason or evidence to support the deletion of this reasonablebathroom sprinkler exception for dwelling units in apartment buildings that was in the Codes for over34 years until it was removed in the 2013 edition of NFPA 13. It is entirely reasonable based on theNFPA fire data report to reinstate this bathroom exception for such small bathrooms (less than orequal to 55 sq. ft.) in dwelling units in apartment buildings.

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8.15.11.2

Hoods or shields installed to protect important electrical equipment from sprinkler discharge shall benoncombustible.




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CommitteeStatement:

The standard gives no guidance on how to install a hood or shield. If water is such a concern,then the standard should require that the electrical equipment be installed in the appropriateNEMA enclosure.

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8.15.24 Revolving Doors Enclosures.

8.15.24.1

Sprinkler protection shall not be required within revolving door enclosures.


8.15.24.2 Indoor Swimming Pools.

8.15.24.2.1

The area directly above indoor swimming pools shall not require sprinkler protection unless therequirements of 8.15.24.2.2 apply.

8.15.24.2.2

The area above indoor swimming pools equipped with moveable hard covers that allow the area to beused for athletic activities other than swimming and other water sports shall require sprinkler protection.

8.15.24.2.3

Sprinklers shall be installed in all areas adjacent to indoor swimming pools.




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CommitteeStatement:

It is impractical to install sprinklers within these areas. The standard should specificallyexclude these.

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8.15.24.2 Indoor Swimming Pools.

8.15.24.2.1

The area directly above indoor swimming pools shall not require sprinkler protection unless therequirements of 8.15.24.2.2 apply.

8.15.24.2.2

The area above indoor swimming pools equipped with moveable hard covers that allow the area to beused for athletic activities other than swimming and other water sports shall require sprinkler protection.

8.15.24.2.3

Sprinklers shall be installed in all areas adjacent to indoor swimming pools.




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CommitteeStatement:

Indoor swimming pools represent very low fire hazards and frequently allowed to be omitted bylocal AHJ’s. These new sections will provide guidance to support a reasonable approach and areasonable degree of protection levels.

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8.2.4 Floor Control Valve Assemblies.

8.2.4.1*

Multistory buildings exceeding two stories in height shall be provided with a floor control valve, checkvalve, main drain valve, and flow switch for isolation, control, and annunciation of water flow on eachfloor level.

8.2.4.2

The floor control valve, check valve, main drain valve, and flow switch required by 8.2.4.1 shall not berequired where sprinklers on the top level of a multistory building are supplied by piping on the floorbelow.

8.2.4.3

The floor control valve, check valve, main drain valve, and flow switch required by 8.2.4.1 shall not berequired where the total area of all floors combined does not exceed the system protection arealimitations of 8.2.1 .




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Committee Statement

CommitteeStatement:

This section was added in the 2013 edition of the standard as section 8.16.1.5 but is moredirectly associated with section 8.2 and should be relocated there for clarity and consistency

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8.16.2.4.2*

Drain connections for systems supply risers and mains shall be sized as shown in Table 8.16.2.4.2.

Table 8.16.2.4.2 Drain Size

Riser or Main Size (in.)Size of Drain Connection

(in.)

Up to 2 3⁄4 or larger

21⁄2, 3, 31⁄2 11⁄4 or larger

4 and larger 2 only or larger

For SI units, 1 in. = 25.4 mm.



A.8.16.2.4.2_FR-154.docx




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CommitteeStatement:

The current text restricts the main drain to no larger than 2”. This is a practical means forperforming the forward flow test of the backflow device as required by 8.17.4.6.1 but it needs tobe allowed to be a larger diameter.

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A.8.16.2.4.2 This is a very practical means for performing the forward flow test of the backflow device as required by 8.17.4.6.1.


8.16.4.1.4.2

Electric supervision of the heat-tracing system shall provide positive confirmation that the circuit isenergized. Heat tracing systems shall be supervised by one of the following methods:

(1) Central station, proprietary, or remote station signaling service

(2) Local signaling service that will cause a signal at a constantly attended location




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Committee Statement: This change is to correlate with NFPA 14.

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8.16.6* Air Venting.


The vent shall be located near the highest point in the system to remove the majority of the air by one ofthe following methods:

(1) Manual valve, minimum 1 ⁄2 in. size

(2) Automatic air vent

(3) Other approved means


Submitter Full Name: Matthew Klaus

Organization: National Fire Protection Assoc

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Submittal Date: Wed Sep 18 14:17:14 EDT 2013

Committee Statement

CommitteeStatement:


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First Revision No. 152-NFPA 13-2013 [ New Section after 8.17 ]

8.18 Electrical Bonding and Grounding.

8.18.1*

Fire sprinkler systems shall be permitted to be used for bonding in accordance with NFPA 70 .

8.18.2

Fire sprinkler systems shall not be used for grounding of electrical systems.



FR_152.docx ANNEX




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CommitteeStatement:

Currently there is some language in Chapter 10 in regards to bonding of underground pipe.Language that applies to the overhead piping of the system needs to be included in thestandard.

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A.8.18.1 While the use of the sprinkler system piping as the grounding electrode for the building is prohibited, NFPA 70 requires that all metallic piping systems be bonded to disperse stray electrical currents. Therefore, the sprinkler system piping should be bonded to other metallic systems.


8.17.2.3* Size.

The size of the pipe for the fire department connection shall be in accordance with one of the following:

(1) Pipe size shall be a minimum of 4 in. (100 mm) for fire engine connections.

(2) Pipe size shall be a minimum of 6 in. (150 mm) for fire boat connections.

(3) For hydraulically calculated systems, the fire department connection pipe size shall be permitted tobe less than 4 in. (100 mm) and no , but not less than the size of system riser, where serving onesystem riser largest riser being served by that connection .




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CommitteeStatement:

There is no reason to limit the FDC pipe to the size of the riser for single systems as weassume one fire (see 1.1.2)

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8.17.2.6.1


The automatic drain valve shall be installed in a location that permits inspection and testing as requiredby NFPA 25 .




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CommitteeStatement:

The text for this revision was copied from 5.9.4.2 of NFPA 24-2013. The same instruction foraccessibility and freeze protection for an automatic drain valve should also be provided in NFPA13.

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8.17.2.6* Drainage.

The piping between the check valve and the outside hose coupling shall be equipped with an approvedautomatic drip drain valve in areas subject to freezing.

8.17.2.6.1


The automatic drain valve shall be installed in a location that permits inspection and testing as requiredby NFPA 25 .




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Committee Statement

Committee Statement: Language was revised to be congruent with NFPA 24 and FR-157.

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8.16.2.4.6* Main Drain Test Connections.

8.16.2.4.6.1

Main drain test connections shall be provided at locations that will permit flow tests of water suppliesand connections.

8.16.2.4.6.2

Main drain test connections shall be installed that the valve can be opened wide for a sufficient time toassure a proper test without causing water damage.

8.16.2.4.6.3

Main drain connections shall be sized in accordance with 8.12.4.2 .




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CommitteeStatement:

Having these reqirements in two places and referring each to the other is confusing for theuser of NFPA 13.

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8.17.4.5.1* Backflow Prevention Valves.

Means shall be provided downstream of all backflow prevention valves for forward flow tests at aminimum flow rate of the system demand including hose allowance where applicable .



FR_160.docx Annex




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Committee Statement

CommitteeStatement:

System demand refers to flow rate and pressure. This test is only concerned with testing at theproper flow rate. This revised terminology is consistent with NFPA 25.

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A.8.17.4.6.1 System demand refers to flow rate and pressure. This test is only concerned with testing at the proper flow rate. The full flow test of the backflow prevention valve can be performed with a test header or other connection downstream of the valve. A bypass around the check valve in the fire department connector line with a control valve in the normally closed position can be an acceptable arrangement. When flow to a visible drain cannot be accomplished, closed loop flow can be acceptable if a flowmeter or site glass is incorporated into the system to ensure flow. When a backflow prevention device is retroactively installed on a pipe schedule system, the revised hydraulic calculation still follows the pipe schedule method of 11.2.2 with the inclusion of friction loss for the device.


9.1.1.5.2*

Mild steel Mild steel Hanger rods and hangers formed from mild steel rods shall be permitted to be notlisted.




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Section 9.1.1.5.2 is editorially clarified to indicate that the section is intended to apply to bothhanger rods and hangers that are formed from mild steel rod. Additional modifications were madeto PI 44 to join the two proposed sections into a single requirement.

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9.1.1.6 Component Material.

9.1.1.6.1

Unless permitted by 9.1.1.6.2 or 9.1.1.6.4 9.1.1.6.3 , hangers and their components shall be ferrous.

9.1.1.6.2

Nonferrous components that have been proven by fire tests to be adequate for the hazard application, thatare listed for this purpose, and that are in compliance with the other requirements of this section shall beacceptable.

9.1.1.6.3*


Ferrous hanger rods shall be fabricated from steel that meets the requirements of ASTM A307,Standard Specification for Carbon Steel Bolts and Studs , 60 000 psi tensile strength, Grade A or B, orthe material, strength and fit requirements of other equivalent standards.

9.1.1.6.4

Holes through solid structural members shall be permitted to serve as hangers for the support of systempiping, provided such holes are permitted by applicable building codes and the spacing and supportprovisions for hangers of this standard are satisfied.




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A new Section 9.1.1.6.3 was added since there are no requirements in the standard for the hangerrod. The hanger rod is a critical component in maintaining the integrity of the sprinkler system andminimum requirements for the rod need to be specified. The hanger rod is assumed by designersand contractors to have characteristics that will provide the anticipated performance after installation.The addition of the requirements in this section should provide the guidance for the anticipatedperformance.

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9.1.1.7.1


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For trapeze hangers, the minimum size of steel angle or pipe span between purlins or joists structuralmembers shall be such that the section modulus required in Table 9.1.1.7.1(a) does not exceed theavailable section modulus of the trapeze member from Table 9.1.1.7.1(b).

Table 9.1.1.7.1(a) Section Modulus Required for Trapeze Members (in.3)

bold"Nominal Diameter of Pipe Being Supported — Schedule 10 Steel

Span (ft) 1 1.25 1.5 2 2.5 3 3.5 4 5 6 8 10

1.5 0.08 0.08 0.09 0.09 0.10 0.11 0.12 0.13 0.15 0.18 0.26 0.34

2.0 0.11 0.11 0.12 0.13 0.14 0.15 0.16 0.17 0.20 0.24 0.34 0.45

2.5 0.14 0.14 0.15 0.16 0.18 0.21 0.23 0.25 0.30 0.36 0.50 0.69

3.0 0.16 0.17 0.18 0.19 0.20 0.22 0.24 0.26 0.31 0.36 0.51 0.67

3.5 0.19 0.20 0.21 0.22 0.24 0.26 0.28 0.30 0.36 0.42 0.60 0.78

4.0 0.22 0.22 0.24 0.25 0.27 0.30 0.32 0.34 0.41 0.48 0.68 0.89

4.5 0.24 0.25 0.27 0.28 0.30 0.33 0.36 0.38 0.46 0.54 0.77 1.01

5.0 0.27 0.28 0.30 0.31 0.34 0.37 0.40 0.43 0.51 0.60 0.85 1.12

5.5 0.30 0.31 0.33 0.34 0.37 0.41 0.44 0.47 0.56 0.66 0.94 1.23

6.0 0.33 0.34 0.35 0.38 0.41 0.44 0.48 0.51 0.61 0.71 1.02 1.34

6.5 0.35 0.36 0.38 0.41 0.44 0.48 0.52 0.56 0.66 0.77 1.11 1.45

7.0 0.38 0.39 0.41 0.44 0.47 0.52 0.56 0.60 0.71 0.83 1.19 1.56

7.5 0.41 0.42 0.44 0.47 0.51 0.55 0.60 0.64 0.76 0.89 1.28 1.68

8.0 0.43 0.45 0.47 0.50 0.54 0.59 0.63 0.68 0.82 0.95 1.36 1.79

8.5 0.46 0.48 0.50 0.53 0.58 0.63 0.67 0.73 0.87 1.01 1.45 1.90

9.0 0.49 0.50 0.53 0.56 0.61 0.66 0.71 0.77 0.92 1.07 1.53 2.01

9.5 0.52 0.53 0.56 0.60 0.64 0.70 0.75 0.81 0.97 1.13 1.62 2.12

10.0 0.54 0.56 0.59 0.63 0.68 0.74 0.79 0.85 1.02 1.19 1.70 2.23

10.5 0.57 0.59 0.62 0.66 0.71 0.78 0.83 0.90 1.07 1.25 1.79 2.35

11.0 0.60 0.62 0.65 0.69 0.74 0.81 0.87 0.94 1.12 1.31 1.87 2.46

11.5 0.63 0.64 0.68 0.72 0.78 0.85 0.91 0.98 1.17 1.37 1.96 2.57

12.0 0.65 0.67 0.71 0.75 0.81 0.89 0.95 1.02 1.22 1.43 2.04 2.68

12.5 0.68 0.70 0.74 0.78 0.85 0.92 0.99 1.07 1.27 1.49 2.13 2.79

13.0 0.71 0.73 0.77 0.81 0.88 0.96 1.03 1.11 1.33 1.55 2.21 2.90

13.5 0.73 0.76 0.80 0.85 0.91 1.00 1.07 1.15 1.38 1.61 2.30 3.02

14.0 0.76 0.78 0.83 0.88 0.95 1.03 1.11 1.20 1.43 1.67 2.38 3.13

14.5 0.79 0.81 0.86 0.91 0.98 1.07 1.15 1.24 1.48 1.73 2.47 3.24

15.0 0.82 0.84 0.89 0.94 1.02 1.11 1.19 1.28 1.53 1.79 2.56 3.35

15.5 0.84 0.87 0.92 0.97 1.05 1.14 1.23 1.32 1.58 1.85 2.64 3.46

16.0 0.87 0.90 0.95 1.00 1.08 1.18 1.27 1.37 1.63 1.91 2.73 3.58

Nominal Diameter of Pipe Being Supported — Schedule 40 Steel

bold" Span(ft) bold"1 bold"1.25 bold"1.5 bold"2 bold"2.5 bold"3 bold"3.5 bold"4 bold"5 bold"6 bold"8 bold"10

1.5 0.08 0.09 0.09 0.1 0.11 0.12 0.14 0.15 0.18 0.22 0.30 0.41

2.0 0.11 0.11 0.12 0.13 0.15 0.16 0.18 0.20 0.24 0.29 0.40 0.55

2.5 0.14 0.14 0.15 0.16 0.17 0.18 0.20 0.21 0.25 0.30 0.43 0.56

3.0 0.16 0.17 0.18 0.20 0.22 0.25 0.27 0.30 0.36 0.43 0.60 0.82

3.5 0.19 0.20 0.21 0.23 0.26 0.29 0.32 0.35 0.42 0.51 0.70 0.96

4.0 0.22 0.23 0.24 0.26 0.29 0.33 0.36 0.40 0.48 0.58 0.80 1.10

4.5 0.25 0.26 0.27 0.29 0.33 0.37 0.41 0.45 0.54 0.65 0.90 1.23


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bold"Nominal Diameter of Pipe Being Supported — Schedule 10 Steel


Note: The table is based on a maximum bending stress of 15 ksi and a midspan concentrated load from15 ft (4.6 m) of water-filled pipe, plus 250 lb (114 kg).

Table 9.1.1.7.1(b) Available Section Modulus of Common Trapeze Hangers (in. 3 )

Pipe

Modulus (in. 3 ) Angles (in.) Modulus (in. 3 )in. mm

Schedule 10

1 25 0.12 1 1 ⁄2 × 1 1 ⁄2 × 3 ⁄16 0.10

1 1 ⁄4 32 0.19 2 × 2 × 1 ⁄8 0.13

1 1 ⁄2 40 0.26 2 × 1 1 ⁄2 × 3 ⁄16 0.18

2 50 0.42 2 × 2 × 3 ⁄16 0.19

2 1 ⁄2 65 0.69 2 × 2 × 1 ⁄4 0.25

3 80 1.04 2 1 ⁄2 × 1 1 ⁄2 × 3 ⁄16 0.28

3 1 ⁄2 90 1.38 2 1 ⁄2 × 2 × 3 ⁄16 0.29

4 100 1.76 2 × 2 × 5 ⁄16 0.30

5 125 3.03 2 1 ⁄2 × 2 1 ⁄2 × 3 ⁄16 0.30

6 150 4.35 2 × 2 × 3 ⁄8 0.35

2 1 ⁄2 × 2 1 ⁄2 × 1 ⁄4 0.39

3 × 2 × 3 ⁄16 0.41

Schedule 40

1 25 0.13 3 × 2 1 ⁄2 × 3 ⁄16 0.43

1 1 ⁄4 32 0.23 3 × 3 × 3 ⁄16 0.44

1 1 ⁄2 40 0.33 2 1 ⁄2 × 2 1 ⁄2 × 5 ⁄16 0.48

2 50 0.56 3 × 2 × 1 ⁄4 0.54

2 1 ⁄2 65 1.06 2 1 ⁄2 × 2 × 3 ⁄8 0.55

3 80 1.72 2 1 ⁄2 × 2 1 ⁄2 × 3 ⁄8 0.57

3 1 ⁄2 90 2.39 3 × 3 × 1 ⁄4 0.58

4 100 3.21 3 × 3 × 5 ⁄16 0.71

5 125 5.45 2 1 ⁄2 × 2 1 ⁄2 × 1 ⁄2 0.72

6 150 8.50 3 1 ⁄2 × 2 1 ⁄2 × 1 ⁄4 0.75

3 × 2 1 ⁄2 × 3 ⁄8 0.81

3 × 3 × 3 ⁄8 0.83

3 1 ⁄2 × 2 1 ⁄2 × 5 ⁄16 0.93

3 × 3 × 7 ⁄16 0.95

4 × 4 × 1 ⁄4 1.05

3 × 3 × 1 ⁄2 1.07

4 × 3 × 5 ⁄16 1.23

4 × 4 × 5 ⁄16 1.29

4 × 3 × 3 ⁄8 1.46

4 ×4 × 3 ⁄8 1.52

5 × 3 1 ⁄2 × 5 ⁄16 1.94

4 × 4 × 1 ⁄2 1.97

4 × 4 × 5 ⁄8 2.40

4 × 4 × 3 ⁄4 2.81


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Pipe

Modulus (in. 3 ) Angles (in.) Modulus (in. 3 )in. mm

6 × 4 × 3 ⁄8 3.32

6 × 4 × 1 ⁄2 4.33

6 × 4 × 3 ⁄4 6.25

6 × 6 × 1 8.57


Table 9.1.1.7.1(b) Available Section Modulus of Common Trapeze Hangers (in. 3 )

Pipe

Modulus (in. 3 )in. mm

Schedule 10

1 25 0.12

1 1 ⁄4 32 0.19

1 1 ⁄2 40 0.26

2 50 0.42

2 1 ⁄2 65 0.69

3 80 1.04

3 1 ⁄2 90 1.38

4 100 1.76

5 125 3.03

6 150 4.35

Schedule 40

1 25 0.13

1 1 ⁄4 32 0.23

1 1 ⁄2 40 0.33

2 50 0.56

2 1 ⁄2 65 1.06

3 80 1.72

3 1 ⁄2 90 2.39

4 100 3.21

5 125 5.45

6 150 8.50

Angles (in.) Modulus (in. 3 )

1 1 ⁄2 × 1 1 ⁄2 × 3 ⁄16 0.10

2 × 2 × 1 ⁄8 0.13

2 × 1 1 ⁄2 × 3 ⁄16 0.18

2 × 2 × 3 ⁄16 0.19

2 × 2 × 1 ⁄4 0.25

2 1 ⁄2 × 1 1 ⁄2 × 3 ⁄16 0.28

2 1 ⁄2 × 2 × 3 ⁄16 0.29

2 × 2 × 5 ⁄16 0.30

2 1 ⁄2 × 2 1 ⁄2 × 3 ⁄16 0.30

2 × 2 × 3 ⁄8 0.35

2 1 ⁄2 × 2 1 ⁄2 × 1 ⁄4 0.39


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Pipe

Modulus (in. 3 )in. mm

3 × 2 × 3 ⁄16 0.41

3 × 2 1 ⁄2 × 3 ⁄16 0.43

3 × 3 × 3 ⁄16 0.44

2 1 ⁄2 × 2 1 ⁄2 × 5 ⁄16 0.48

3 × 2 × 1 ⁄4 0.54

2 1 ⁄2 × 2 × 3 ⁄8 0.55

2 1 ⁄2 × 2 1 ⁄2 × 3 ⁄8 0.57

3 × 3 × 1 ⁄4 0.58

3 × 3 × 5 ⁄16 0.71

2 1 ⁄2 × 2 1 ⁄2 × 1 ⁄2 0.72

3 1 ⁄2 × 2 1 ⁄2 × 1 ⁄4 0.75

3 × 2 1 ⁄2 × 3 ⁄8 0.81

3 × 3 × 3 ⁄8 0.83

3 1 ⁄2 × 2 1 ⁄2 × 5 ⁄16 0.93

3 × 3 × 7 ⁄16 0.95

4 × 4 × 1 ⁄4 1.05

3 × 3 × 1 ⁄2 1.07

4 × 3 × 5 ⁄16 1.23

4 × 4 × 5 ⁄16 1.29

4 × 3 × 3 ⁄8 1.46

4 ×4 × 3 ⁄8 1.52

5 × 3 1 ⁄2 × 5 ⁄16 1.94

4 × 4 × 1 ⁄2 1.97

4 × 4 × 5 ⁄8 2.40

4 × 4 × 3 ⁄4 2.81

6 × 4 × 3 ⁄8 3.32

6 × 4 × 1 ⁄2 4.33

6 × 4 × 3 ⁄4 6.25

6 × 6 × 1 8.57




Add_Table_9.1.1.7.1_b_Format.docx Table format for 9.1.1.7.1(b)




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Committee Statement

CommitteeStatement:

Section 9.1.1.7.1 is being modified in 4 different ways: 1)Adding inches into the header for the twotables. 2)Reinstating the second footnote that addresses the development of the table. 3)SI units aremissing on footnote for (a) 4)The term purlins and joists has been replaced by "structural members"as this section was never intended to limit the application of this section to only joists and purlins.5)Restructure table (b) to a 2 column format instead of 4 columns. The columns are misleading andnot intended to be read left to right, row-by-row This FR takes into account the modifications in allthree PI (224, 225, and 434)

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9.1.1.7.7

Holes for bolts or rods shall not exceed 1⁄16 in. (1.6 mm) greater than the diameter of the bolt or rod .




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The referenced term bolt also applies to all thread rod used commonly to support firesprinkler piping.

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9.1.1.7.9

Where angles are used for trapeze hangars, slotted holes shall meet all of the following:

(1) The length of each slotted hole shall not exceed 3 in.

(2) The width of the slotted hole shall not exceed 1 ⁄16 in. greater than the bolt or rod diameter.

(3) The minimum distance between slotted holes shall be 3 in. edge to edge.

(4) The minimum distance from the end of the angle to the edge of the slotted hole shall be 3 in.

(5) The number of slots shall be limited to three per section of angle.

(6) The washer required by 9.1.1.7.8 shall have a minimum thickness of one-half the thickness ofthe angle.

(7) Multiple washers shall not be used.

(8) Washer and nuts required by 9.1.1.7.8 shall be provided on both the top and bottom of theangle.




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This new language provides guidance for slotted holes used for angles with trapeze hangers.Modifications made to other sections of the standard eliminated slots from being addressed inseveral portions of Ch 9, making this section necessary for slots to continue to be used.

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9.1.1.7.8

Bolts and rods shall be provided with a flat washers and nuts .




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Committee Statement: This section was revised to correlate with the changes made to 9.1.1.7.7 in FR-7.

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9.1.3.10 Minimum Bolt or Rod Size for Concrete.

9.1.3.10.1

The size of a bolt or rod used with a hanger and installed through concrete shall not be less thanspecified in Table 9.1.3.10.1.

Table 9.1.3.10.1 Minimum Bolt or Rod Size for Concrete

Pipe Size Size of Bolt or Rod

in. mm in. mm

Up to and including 4 100 3⁄8 10

5 125 1⁄2 13

6 150

8 200

10 250 5⁄8 15

12 300 3⁄4 20

9.1.3.10.2


9.1.3.10.3





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CommitteeStatement:

The referenced term bolt also applies to all thread rod used commonly to support fire sprinklerpiping especially through thick beams. Additional modifications to this section were made to addthe term "or rod" for consistency with the revision created by PI 525.

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9.1.4.5 Minimum Bolt or Rod Size for Steel.

9.1.4.5.1

The size of a bolt or rod used with a hanger and installed through steel shall not be less than specified inTable 9.1.4.5.1.

Table 9.1.4.5.1 Minimum Bolt or Rod Size for Steel

Pipe Size Size of Bolt or Rod

in. mm in. mm

Up to and including 4 100 3⁄8 10

5 125 1⁄2 12

6 150

8 200

10 250 5⁄8 15

12 300 3⁄4 20

9.1.4.5.2


9.1.4.5.3





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CommitteeStatement:

The referenced term bolt also applies to all thread rod used commonly to support fire sprinklerpiping. Additional modifications were made to the section for correlation with the revision madethrough PI 526.

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9.1.5.3 Bolt Bolts, Rods, or Lag Screws .

9.1.5.3.1

Unless the requirements of 9.1.5.3.2 are met, the size of bolt, rod, or lag screw used with a hanger andinstalled on the side of the beam shall not be less than specified in Table 9.1.5.3.1.

Table 9.1.5.3.1 Minimum Bolt, Rod, or Lag Screw Sizes for Side of Beam Installation

Pipe SizeSize of Bolt, Rod or Lag

ScrewLength of Lag Screw Used with Wood

Beams

in. mm in. mm in. mm

Up to and including2

50 3⁄8 10 21⁄2 64

21⁄2 to 6 (inclusive)65 to150

1⁄2 12 3 76

8 200 5⁄8 15 3 76

9.1.5.3.2

Where the thickness of beams or joists does not permit the use of screws 21⁄2 in. (64 mm) long, screws 2in. (50 mm) long shall be permitted with hangers spaced not over 10 ft (3 m) apart.

9.1.5.3.3

All holes for lag screws shall be pre-drilled 1⁄8 in. (3.2 mm) less in diameter than the maximum rootdiameter of the lag screw thread.

9.1.5.3.4


9.1.5.3.5





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CommitteeStatement:

The referenced term bolt also applies to all thread rod used commonly to support fire sprinklerpiping especially through thick beams. Additional modifications were made to the section forcorrelation with the revision made by PI 527.

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9.1.5.6.1

Screws in the side of a timber or joist shall be not less than 21⁄2 in. (64 mm) from the lower edge wheresupporting branch lines pipe is up to and including nominal 2 1 ⁄2 in. and not less than 3 in. (76 mm)where supporting main lines. pipe is greater than nominal 2 1 ⁄2 in.




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CommitteeStatement:

These requirements should be on the loads the screw is carrying and not the type of pipe, thereare buildings with small mains and others with large branch lines,the diameter is a better gauge forthis requirement. Additional editorial corrections were made changing the word "then" to "than" andadd the term "nominal" in front of pipe size.

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9.1.5.7.2

The minimum plank thickness and the minimum width of the lower face of beams or joists in which coachscrew rods are used shall be not less than that specified in Table 9.1.5.7.2 and shown in Figure9.1.5.7.2 .

Table 9.1.5.7.2 Minimum Plank Thicknesses and Beam or Joist Widths

Pipe Size Nominal Plank Thickness Nominal Width of Beam or Joist Face

in. mm in. mm in. mm

Up to and including 2 50 3 76 2 50

21⁄2 65 4 102 2 50

3 80

31⁄2 90

4 100 4 102 3 76

Figure 9.1.5.7.2 Dimensions for Structural Members with Coach Screw Rods.



FR-9.tif coach screw rod




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A figure is extremely helpful in describing which dimension of the beam is the nominal width of thejoist face and which is the plank thickness. The arrow should be labeled "Coach Screw Rod" and


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should be centered on the bottom of the structural member.

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9.2.1.3.1

Unless the requirements of 9.2.1.3.3 apply, sprinkler Sprinkler piping shall be substantially supportedfrom the building structure, which must support the added load of the water-filled pipe plus a minimum of250 lb (114 kg) applied at the point of hanging, except where permitted by 9.2.1.1.2, 9.2.1.3.3, and9.2.1.4.1.




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CommitteeStatement:

The preface "Unless the requirements of 9.2.1.3.1 apply" is not necessary as this provision isstated at the end of the section.

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9.2.3.4.4.4

The Unless flexible sprinkler hose fittings in accordance with 9.2.1.3.3.1 are used, the hanger closest tothe sprinkler shall be of a type that prevents upward movement of the pipe.




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CommitteeStatement:

When flexible hoses are installed in accordance with the listing, the sprinkler is fixed to theceiling, and no additional means are necessary to prevent upward thrust. The TC revised thelanguage to provide a link to the section on flexible hose fittings.

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9.2.3.5.2.3

Where the armover exceeds the maximum unspupported length of 9.2.3.5.2.1 , a hanger shall beinstalled so that the distance from the end sprinkler or drop nipple to the hanger is not greater than 12in. (305 mm) for steel or 6 in. (150 mm) for copper, or the pipe shall be extended beyond the endsprinkler and shall be supported by an additional hanger.




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CommitteeStatement:

For a armover exceeding 12 inches in length, section 9.2.3.5.2.1 requires a hanger, but it does notrequire the hanger to be within 12 inches of the end. Without this new section, the standard allowsunsupported armovers in excess of 12 inches. The additional information provides another optionfor properly supporting the armover which is currently permitted for unsupported lengths ofbranchlines.

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9.2.3.5.2.2

The Unless flexible sprinkler hose fittings in accordance with 9.2.1.3.3.1 are used, the hanger closest tothe sprinkler shall be of a type that prevents upward movement of the pipe.




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CommitteeStatement:

When flexible hoses are installed in accordance with the Listing, the sprinkler is fixed to theceiling, and no additional means are necessary to prevent upward thrust. This section wasmodified to be consistent with the TC action on FR 11.

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9.2.4.1

Unless any of the requirements of 9.2.4.2, 9.2.4.3 , 9.2.4.4 , 9.2.4.5 , or through 9.2.4.6 are met,hangers for mains shall be in accordance with 9.2.2, between each branch line, or on each section ofpipe, whichever is the lesser dimension.




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The submitters intent was not achieved based on the proposed modification because it wouldrequire all 4 requirements to be met. The revisions clarify that only one of the requirements needsto be complied with.

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9.2.6* Pipe Stands.

9.2.6.1 General.

Pipe stands shall be sized to support a minimum of five times the weight of the water-filled pipe plus 250lb (114 kg).

9.2.6.1.1

Where pipe stands are used to support system piping, the requirements of 9.2.6 shall apply unless therequirements of 9.2.6.1.2 are met.

9.2.6.1.2

Pipe stands certified by a registered professional engineer to include all of the following shall be anacceptable alternative to the requirements of 9.2.6 :

(1) Pipe stands shall be designed to support five times the weight of water-filled pipe plus 250 lb (114kg) at each point of piping support.

(2) These points of support shall be adequate to support the system.

(3) The spacing between pipe stands shall not exceed the value given for the type of pipe as indicatedin Table 9.2.2.1(a) or Table 9.2.2.1(b) .

(4) Pipe stand components shall be ferrous.

(5) Detailed calculations shall be submitted, when required by the reviewing authority, showingstresses developed in the pipe stand, the system piping and fittings, and safety factors allowed.

9.2.6.1.3

Where water-based fire protection systems are required to be protected against damage fromearthquakes, pipe stands shall also meet the requirements of 9.3.8 .

9.2.6.2 Component Material.

9.2.6.2.1

Pipe stands and their components shall be ferrous unless permitted by 9.2.6.2.2 .

9.2.6.2.2

Nonferrous components that have been proven by fire tests to be adequate for the hazard applicationand that are in compliance with the other requirements of this section shall be acceptable.

9.2.6.3 Sizing.

9.2.6.3.1*


The maximum heights for pipe stands shall be in accordance with Table 9.2.6.3.1 .

Table 9.2.6.3.1 Maximum Pipe Stand Heights

System Pipe Diameter Pipe Stand Diameter

1 1 ⁄2 in. 2 in. 2 1 ⁄2 in. 3 in. 4 in.

1 1 ⁄2 in. 10 ft 14 ft 18 ft 28 ft 30 ft

2 in. 8 ft 12 ft 16 ft 26 ft 30 ft

2 1 ⁄2 in. 6 ft 10 ft 14 ft 24 ft 30 ft

3 in. — 8 ft 12 ft 22 ft 30 ft

>3 in. up to and including 8 in. — — — — 10 ft


9.2.6.3.2

The distance between pipe stands shall not exceed the values in Table 9.2.2.1(a) or Table 9.2.2.1(b) .

9.2.6.4 Pipe Stand Base.


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9.2.6.4.1

The pipe stand base shall be secured by an approved method.

9.2.6.4.2

Pipe stands shall be anchored to a concrete pier or footing with either expansion shields, bolts forconcrete, or cast-in-place J hooks.

9.2.6.5 Attaching to System Piping.

9.2.6.5.1

Piping shall be attached to the pipe stand with U-bolts or equivalent attachment.

9.2.6.5.2

Where a horizontal bracket is used to attach the system piping to the pipe stand, it shall not be morethan 1 ft (0.3 m).

9.2.6.6 Thrust.

9.2.6.6.1*


System piping shall be supported and restrained to restrict movement due to sprinkler/nozzle reactionand water surges.

9.2.6.6.2*


Where thrust forces are anticipated to be high, a pipe ring shall secure the system piping to the pipestand.

9.2.6.7 Exterior Applications.

Pipe stands shall be constructed of Schedule 40 threaded pipe, malleable iron flange base, and shallhave a threaded cap top.

9.2.6.2

The pipe stand base shall be secured by an approved method.

9.2.6.3

Where pipe stands are utilized, they shall be approved.



Pipe_Stand_Table_-_13_-_2016_edition.docx Table 9.2.6.3.1




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Committee Statement

CommitteeStatement:

Pipe stand requirements should be specified as part of the other support requirements forwater-based fire protection systems. The text for the first revision has been adapted from existingcriteria in NFPA 15 as well as efforts from a task group on this subject. The following conceptsincorporated are: an alternate requirement for professional engineers, material options for the pipestand, addressing the slenderness ratio of pipe in a column, addressing thrust from system filling ordry applications, addressing the use of pipe saddles, interior versus exterior applications, addressingpipe stands when in areas subject to seismic requirements. Other standards and model codesreference NFPA 13 for requirements on hanging, supporting and bracing water based fire protectionequipment. The Committee and task group recognize that additional information will be needed at the


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second revision. Items anticipated include base plate information, looped piping, and figures forclearer explanations.

ResponseMessage:



185 of 474 11/7/2013 12:33 PM

Table 9.2.6.3.1 Maximum Pipe Stand Heights System Pipe

Diameter Pipe Stand Diameter

1 ½ in. 2 in. 2 ½ in. 3 in. 4 in. 1 ½ in. 10 ft 14 ft 18 ft 28 ft 30 ft

2 in. 8 ft 12 ft 16 ft 26 ft 30 ft 2 ½ in. 6 ft 10 ft 14 ft 24 ft 30 ft 3 in. ---- 8 ft 12 ft 22 ft 30 ft

>3 in. up to and including 8 in.

---- ---- ---- ---- 10 ft



9.3.4.2

Unless any of the requirements of 9.3.4.3 through 9.3.4.7or 9.3.4.10 are met, where pipe passesthrough holes in platforms, foundations, walls, or floors, the holes shall be sized such that the diameter ofthe holes is nominally 2 in. (50 mm) larger than the pipe for pipe 1 in. (25 mm) nominal to 31⁄2 in. (90 mm)nominal and 4 in. (100 mm) larger than the pipe for pipe 4 in. (100 mm) nominal and larger.




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CommitteeStatement:

Section 9.3.4.10 was added to the 2013 edition of NFPA 13 but was not added to section9.3.4.2, which allows exceptions to the 2 in. clearance requirement.

ResponseMessage:



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9.3.4.5

No clearance shall be required if flexible couplings are located within 1 ft (305 mm) of each side of a wall,floor, platform, or foundation. or if the requirements of 9.3.2.3.1 (2) are met.




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CommitteeStatement:

9.3.4.5 says that flexible couplings have to be within 1 ft (305 mm) of each side of a floor, platform,or foundation to omit the clearance hole. 9.3.2.3.1 in no. 2 says within 24 in. below the floor inmultistory buildings. As such, if a flexible coupling is located more than 12 in. and less than 24 in.below a floor, a clearance hole is required by 9.3.4.5. Increasing the coupling distance to within 24 in.below the floor, platform, or foundation in 9.3.4.5 will conform with 9.3.2.3.1(2).Rather than reprintingthe language of 9.3.2.3.1(2), the TC added a reference to this section.

ResponseMessage:



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First Revision No. 45-NFPA 13-2013 [ Sections 9.3.4.9, 9.3.4.10 ]

9.3.4.9

Clearance from The installed horizontal and upward vertical clearance between horizontal sprinklerpiping and structural members not penetrated or used, collectively or independently, to support the pipingshall be at least 2 in. (50 mm).

9.3.4.10*


No clearance shall be required where piping is supported by holes through structural members aspermitted by 9.1.1.6.3 . The installed horizontal and upward vertical clearance between horizontalsprinkler piping and equipment attached to the building structure or other systems’ piping shall be at least2 in. (50 mm).




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CommitteeStatement:

Section 9.3.4.9 and 9.3.4.10 were revised to improve clarity on clearance requirement in order toavoid impact damage and potential leakage during a seismic event. Section 9.3.4.11 and subsectionwere added to provide additional specific clearance requirement for sprinkler piping and sprinklers inorder to avoid impact damage and potential leakage during a seismic event. Flexible sprinkler hosefittings are inherently impact resistant and therefore do not need the additional clearancerequirement. Section 9.3.4.12 and 9.3.4.13 were added to clarify the previous edition 9.3.4.10 whichwas vague and difficult to interpret.

ResponseMessage:



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9.3.5.1.4.1

When a shared support structure is used to support gravity and seismic loads, the structure shall bedesigned to support these loads for all pipe and distribution systems on the structure using either9.3.5.9.5 9.3.5.9.3 or 9.3.5.9.6 9.3.5.9.4 with an importance factor, Ip, of 1.5 being applied to all of thedistribution systems.




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Committee Statement: Editorial correction to reference.

Response Message:


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9.3.5.2.3

The listed loads shall be reduced as shown in Table 9.3.5.2.3 for installations where the brace is lessthan 90 degrees from vertical.

Table 9.3.5.2.3 Allowable Listed Horizontal Load on Brace Assemblies Based on Weakest Componentof Brace Assembly Adjustment

Brace Angle Degrees

from VerticalAllowable Horizontal Load

30 to 44 Listed load rating divided by 2.000



90 Listed load rating




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Committee Statement

CommitteeStatement:

The revision to this section went beyond simply looking at adding the word listed, however theconcept of adding clarity to his section is the same. Many agencies already address themodifications in their data tables, therefore it is important that people aren't taking the reductionsmultiple times. The table title was also modified to more clearly address the scope of the table.

ResponseMessage:



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Sub-Sections] ]



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Lateral sway bracing shall be in accordance with either Table 9.3.5.5.2(a), (b) Table 9.3.5.5.2(b) ,(c) Table 9.3.5.5.2(c) , Table 9.3.5.5.2(d) , (d), or (e) Table 9.3.5.5.2(e) , or Table 9.3.5.5.2(f) , or9.3.5.5.3, based on the piping material of the sprinkler system.

Table 9.3.5.5.2(a) Maximum Load (Fpw) in Zone of Influence (lb), (Fy = 30 ksi) Schedule 10 Steel Pipe

Pipe (in.)Lateral Sway Brace Spacing (ft)a

20b 25b 30c 35c 40d

1 111 89 73 63 52

11⁄4 176 141 116 99 83

11⁄2 241 193 158 136 114

2 390 312 256 219 183

21⁄2 641 513 420 360 301

3 966 773 633 543 454

31⁄2 1281 1025 840 720 603

4 1634 1307 1071 918 769

5 2814 2251 1844 1581 1324

6 and largere 4039 3231 2647 2269 1900

Note: ASTM A 106 Grade B or ASTM A 53 Grade B has an Fy = 35 ksi. An Fy = 30 ksi was used also as a

conservative value to account for differences in material properties as well as other operational stresses.

a The tables for the maximum load, Fpw, in zone of influence are based on specific configurations of

mains and branch lines.

b Assumes branch lines at center of pipe span and near each support.

c Assumes branch lines at third-points of pipe span and near each support.

d Assumes branch lines at quarter-points of pipe span and near each support.

e Larger diameter pipe can be used when justified by engineering analysis.

Table 9.3.5.5.2(b) Maximum Load (Fpw) in Zone of Influence (lb), (Fy= 30 ksi) Schedule 40 Steel Pipe


20b 25b 30c 35c 40d

1 121 97 79 68 57

11⁄4 214 171 140 120 100

11⁄2 306 245 201 172 144

2 520 416 341 292 245

21⁄2 984 787 645 553 463

3 1597 1278 1047 897 751

31⁄2 2219 1775 1455 1247 1044

4 2981 2385 1954 1675 1402

5 5061 4049 3317 2843 2381

6 and largere 7893 6314 5173 4434 3713






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Table 9.3.5.5.2(c) Maximum Load (Fpw) in Zone of Influence (lb), (Fy = 30 ksi) Schedule 5 Steel Pipe


20b 25b 30c 35c 40d

1 71 56 46 40 33

11⁄4 116 93 76 65 55

11⁄2 154 124 101 87 73

2 246 197 161 138 116

21⁄2 459 367 301 258 216

3 691 552 453 388 325

31⁄2 910 728 597 511 428

4e 1160 928 760 652 546









Table 9.3.5.5.2(d) Maximum Load (Fpw) in Zone of Influence (lb), (Fy = 8 ksi) CPVC Pipe


20b 25b 30c 35c 40d

3⁄4 15 12 10 8 7

1 28 22 18 15 13

11⁄4 56 45 37 30 26

11⁄2 83 67 55 45 39

2 161 129 105 87 76

21⁄2 286 229 188 154 135

3 516 413 338 278 243






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Table 9.3.5.5.2(e) Maximum Load (Fpw) in Zone of Influence (lb), (Fy = 30 ksi) Type M Copper Tube (withSoldered Joints)


20b 25b 30c 35c 40d

3⁄4 16 13 10 9 8

1 29 24 19 16 14

11⁄4 53 42 35 28 25

11⁄2 86 69 56 46 41

2e 180 144 118 97 85







Table 9.3.5.5.2(f) Maximum Load ( F pw ) in Zone of Influence (lbs), ( F y = 9ksi) Type M Copper Tube

(with Brazed Joints)

Lateral Sway Spacing (ft) a

Diameter 20 a 25 b 30 c 35 c 40 c

3 ⁄4 12 10 8 7 6

1 23 18 15 13 11

1 1 ⁄4 41 33 27 23 19

1 1 ⁄2 67 53 44 38 31

2 e 140 112 92 78 66

a The tables for the maximum load F pw , in zone of influence are bases on specific configurations ofmains and branch lines.







Add_Table_9_3_5_5_2_f.docx


Submitter Full Name: Matthew Klaus


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Organization: National Fire Protection Assoc

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Submittal Date: Fri Oct 18 10:41:55 EDT 2013

Committee Statement

CommitteeStatement:

New Table 9.3.5.5.2(f) (see attached) adds ZOI tables for copper piping with brazed connections.NFPA 13 recognizes both brazed and soldered connections for copper piping. Table 9.3.5.5.2(e)covers piping with soldered connections. Brazed copper piping has different design considerations.These are: • The yield strength of the copper piping is reduced from 30 ksi to 9 ksi, due to theannealing effects of the brazing process. • ASCE/SEI 7-10 considers copper piping with brazedconnections ductile. The Response Factor Rp increases from 4.5 to 9, and the strength design stressincreases from 0.70Fy to 0.90Fy. The table reflects these design differences. A reference to the newTable 9.3.5.5.2(f) was added.

ResponseMessage:


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Add Table 9.3.5.5.2(f) as follows:

Table 9.3.5.5.2(f) Maximum Load (Fpw) in Zone of Influence (lbs), (Fy = 9ksi) Type M Copper Tube (with Brazed Joints)

Lateral Sway Spacing (ft)a Diameter 20a 25b 30c 35c 40d

3/4 12 10 8 7 6 1 23 18 15 13 11

1 1/4 41 33 27 23 19 1 1/2 67 53 44 38 31

2e 140 112 92 78 66 a The tables for the maximum load Fpw, in zone of influence are based on specific configurations of mains and branch lines. b Assumes branch lines at center of pipe span and near each support. c Assumes branch lines at third-points of pipe span and near each support. d Assumes branch lines at quarter-points of pipe span and near each support. e Larger diameter pipe can be used when justified by engineering analysis.

Reason for Proposal

This proposal adds ZOI tables for copper piping with brazed connections. NFPA 13 recognizes both brazed and soldered connections for copper piping. Table 9.3.5.5.2(e) covers piping with soldered connections. Brazed copper piping has different design considerations. These are:

• The yield strength of the copper piping is reduced from 30 ksi to 9 ksi, due to the annealing effects of the brazing process.

• ASCE/SEI 7-10 considers copper piping with brazed connections ductile. The Response Factor Rp increases from 4.5 to 9, and the strength design stress increases from 0.70Fy to 0.90Fy.

The table reflects these design differences.


9.3.5.5.2.4

When determining permissible loads in accordance with 9.3.5.5.2 or 9.3.5.5.2.1 on a main withvarying sizes, the allowable load shall be based on the smallest pipe size within the zone of influence.




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Committee Statement

Committee Statement: The situation of a main of varying sizes is not currently addressed.

Response Message:



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9.3.5.5.2.3

The maximum permissible load in the zone of influence of a sway brace shall not exceed the values givenin Table 9.3.5.5.2(a) through Table 9.3.5.5.2(e) Table 9.3.5.5.2(f) or the values calculated in accordancewith 9.3.5.5.3.




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Submittal Date: Sat Aug 24 09:41:52 EDT 2013

Committee Statement

Committee Statement: Revised the references to include the new table created by FR-21.

Response Message:


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9.3.5.5.10*

The requirements of 9.3.5.3 shall not apply to pipes individually supported by rods less than 6 in. (152mm) long measured between the top of the pipe and the point of attachment to the buildingstructure. 9.3.5.5 shall be permitted to be omitted when either 9.3.5.5.10.1 or 9.3.5.5.10.2 are met.

9.3.5.5.10.1

Branch lines shall comply with the following:

(1)

(2) Seventy-five percent of all the hangers on the branch line shall meet, and not more than twoconsecutive hangers shall be permitted to exceed, the limitation in 9.3.5.5.10.1 (1).

9.3.5.5.10.2

Main piping shall comply with the following:

(1)

(2) Seismic coefficient ( C p ) shall not exceed 1.0.

(3) The nominal pipe diameter shall not exceed 6 in. (152 mm) for feed mains and 4 in. (102 mm) forcross mains.

(4) Seventy-five percent of all the hangers on the main shall meet, and not more than two consecutivehangers shall be permitted to exceed, the limitation in 9.3.5.5.10.2 (1).

(5) Hangers are not omitted in accordance with 9.2.4.3 , 9.2.4.4 , or 9.2.4.5 .



A.9.3.3.5.10_1_A.png Annex figure A.9.3.3.5.10.1(a)

A.9.3.3.5.10_1_B.png Annex figure A.9.3.3.5.10.1(b)

A9.3.5.5.10_FR46.1380820500217.1382107686112.docx




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Committee Statement

CommitteeStatement:

The current section allows omission of lateral bracing (I believe the reference to Section 9.3.5.3 isincorrect, should be 9.3.5.5) on all pipes using short rods. This allows large displacements (on theorder of 4" for even a modest swing of 30 degrees from vertical - see attached graphic). Looking at a

* The branch lines shall be individually supported within 6 in. (152 mm) of the structure, measuredbetween the top of the pipe and the point of attachment to the building structure.

* The main piping shall be individually supported within 6 in. (152 mm) of the structure, measuredbetween the top of the pipe and the point of attachment to the building structure.


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cross main in particular, all attached branch lines will deflect possibly allowing impact on sprinklers,forcing their hangers to accommodate large deflections without damage, and putting stress oncouplings. Additionally, the tributary force on a cross main hanger could be extremely large since itcould include long lengths of unrestrained branch lines. There is no way to determine the lateralcapacity of a hanger, since they are not designed for this purpose. Likewise, for a feed main, thelateral force on the hanger could be very large; again, there is no way to determine if the hanger isadequate to resist these forces and these hangers could be attached using methods adequate forvertical forces but questionable for lateral forces (e.g., using C-clamps). Lengths of feed mains andcross mains are limited so providing braces would not be overly expensive, and is justified based onthe great consequences of a main failure. Branch lines are typically smaller and are individual pipesrather than a piping system such as cross mains.

ResponseMessage:







199 of 474 11/7/2013 12:33 PM

A.9.3.5.5.10 This does not apply to piping supported by or suspended from trapeze hangers.

A.9.3.5.5.10.1(1) Figure A.9.3.5.5.10.1(1)(a) and Figure A.9.3.5.5.10.1(1)(b) are examples of how to measure the distance between the top of pipe and the point of attachment.

A.9.3.5.5.10.2(1) See Figure A.9.3.5.5.10.1(1)(a) and Figure A.9.3.5.5.10.1(1)(b) .

Insert attached Figures A.9.3.5.5.10.1(1)(a) and A.9.3.5.5.10.1(1)(b)

A.9.3.5.5.10.1(1)(a) Measurement for Distance Between Top of Pipe and Point of Attachment (Example 1).

A.9.3.5.5.10.1(1)(b) Measurement for Distance Between Top of Pipe and Point of Attachment (Example 2).


9.3.5.9.3


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The horizontal force, Fpw, acting on the brace shall be taken as Fpw = CpWp, where Cp is the seismic

coefficient selected in Table 9.3.5.9.3 utilizing the short period response parameter, Ss.

Table 9.3.5.9.3 Seismic Coefficient Table

S s C p

0.33 or less 0.35

0.40 0.38

0.50 0.40

0.60 0.42

0.70 0.42

0.75 0.42

0.80 0.44

0.90 0.48

0.95 0.50

1.00 0.51

1.10 0.54

1.20 0.57

1.25 0.58

1.30 0.61

1.40 0.65

1.50 0.70

1.60 0.75

1.70 0.79

1.75 0.82

1.80 0.84

1.90 0.89

2.00 0.93

2.10 0.98

2.20 1.03

2.30 1.07

2.40 1.12

2.50 1.17

2.60 1.21

2.70 1.26

2.80 1.31

2.90 1.35

3.00 1.40


SS Cp SS Cp

0.33 or less 0.35 2.2 1.03

0.4 0.38 2.3 1.07

0.5 0.4 2.4 1.12

0.6 0.42 2.5 1.17

0.7 0.42 2.6 1.21

0.8 0.44 2.7 1.26

0.9 0.48 2.8 1.31


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SS Cp SS Cp

9.3.5.9.3.1

The value of Ss used in Table 9.3.5.9.3 shall be obtained from the authority having jurisdiction or from

seismic hazard maps.

9.3.5.9.3.2*

Linear interpolation shall be permitted to be used for intermediate values of Ss.



Revised_Table_9_3_5_9_3_-_Cp_Summary.docx New Cp Table




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CommitteeStatement:

The USGS seismic hazard maps were revised in ASCE/SEI 7-10, and the maximum short periodresponse factor SS has increased. For example, the maximum value of SS in California nowexceeds 3.7g. The table has been expanded to include values of SS up to 4.0g, for compatibilitywith ASCE/SEI 7-10.

ResponseMessage:


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Revise Table 9.3.5.9.3 as follows:


Reason for Proposal: The USGS seismic hazard maps were revised in ASCE/SEI 7-10, and the maximum short period response factor SS has increased. For example, the maximum value of SS in California now exceeds 3.7g. The table has been expanded to include values of SS up to 4.0g, for compatibility with ASCE/SEI 7-10.

SS Cp SS Cp 0.33 or less 0.35

2.20 1.03

0.40 0.38

2.30 1.07 0.50 0.40

2.40 1.12

0.60 0.42

2.50 1.17 0.70 0.42

2.60 1.21

0.80 0.44

2.70 1.26 0.90 0.48

2.80 1.31

1.00 0.51

2.90 1.35 1.10 0.54

3.00 1.40

1.20 0.57

3.10 1.45 1.30 0.61

3.20 1.49

1.40 0.65

3.30 1.54 1.50 0.70

3.40 1.59

1.60 0.75

3.50 1.63 1.70 0.79

3.60 1.68

1.80 0.84

3.70 1.73 1.90 0.89

3.80 1.77

2.00 0.93

3.90 1.82 2.10 0.98

4.00 1.87


9.3.5.9.6.1*

When riser nipples are provided in systems requiring seismic protection, they shall satisfy the followingequation, unless one of the following conditions is met: and are longer than 4 ft (1.2 m), the weight of thewater-filled branch line pipe in the zone of influence ( W p ) as defined by 9.3.5.9.1 , including the length

of the riser nipple, multiplied by the seismic coefficient ( C p ), and by the height of the riser nipple ( H r ),

divided by the section modulus ( S ) of the riser nipple piping shall not meet or exceed the yield strength( F y ) of the riser nipple piping. If the calculated value is equal to or greater than the yield strength or the

riser nipple, the longitudinal seismic load of each line shall be evaluated individually and branch linesshall be provided with longitudinal sway bracing per 9.3.5.6 .

(1) Where riser nipples are 4 ft (1.2 m) or less in length and C p is 0.50 or less

(2) Where riser nipples are 3 ft (915 mm) or less in length and C p is less than 0.67

(3) Where riser nipples are 2 ft (610 mm) in length or less and C p is less than is 1.0

where:

Hr = length of riser nipple piping (in inches)

Wp = tributary weight (in pounds) for the branch line or portion of branch line within the zone of influenceincluding the riser nipple

Cp = seismic coefficient

S = sectional modulus of the riser nipple pipe

Fy = allowable yield strength of 30,000 psi for steel, 30,000 psi for copper (soldered), 8000 psi for CPVC




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CommitteeStatement:

The original language added to the 2013 edition of NFPA 13 only considered the length of the risernipple. This revised language looks at the Cp value as well as a means for determining when thecalculation is needed. For nipples meeting one of the 3 scenarios in the list, the calculation isn'tnecessary.

ResponseMessage:




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9.3.5.9.6.2

If the calculated value is equal to or greater than the yield strength of the riser nipple, the longitudinalseismic load of each line shall be evaluated individually, and branch lines shall be provided withlongitudinal sway bracing per 9.3.5.6 9.3.5.4 .




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Committee Statement

Committee Statement: Editorial correction (incorrect reference).

Response Message:


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9.3.6.1*

Restraint is considered a lesser degree of resisting loads than bracing and shall be provided by use of oneof the following:

(1) Listed sway brace assembly

(2) Wraparound U-hook satisfying the requirements of 9.3.5.5.11

(3) No. 12, 440 lb (200 kg) wire installed at least 45 degrees from the vertical plane and anchored onboth sides of the pipe

(4) CPVC hangers utilizing two points of attachment listed to provide restraint

(5)

(6) Other approved means




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Committee Statement

CommitteeStatement:

CPVC hangers exist that are listed to provide restraint, this technical oversight has beencorrected by this revision.

ResponseMessage:


* Hanger not less than 45 degrees from vertical installed within 6 in. (152 mm) of the vertical hangerarranged for restraint against upward movement, provided it is utilized such that l/r does not exceed400, where the rod shall extends to the pipe or have a surge clip has been installed


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9.3.6.4*

Branch lines shall be laterally restrained at intervals not exceeding those specified in Table 9.3.6.4(a) orTable 9.3.6.4(b) based on branch line diameter and the value of Cp.

Table 9.3.6.4(a) Maximum Spacing (ft) of Steel Branch Line Restraints

Seismic Coefficient ( C p )

Pipe (in.) C p ≤ 0.50 0.5 < C p ≤ 0.71 C p > 0.71

1 43 36 26

1 1 ⁄4 46 39 27

1 1 ⁄2 49 41 29

2 53 45 31

Table 9.3.6.4(a) Maximum Spacing (ft), of Steel Pipe Restraints

Seismic Coefficient, C p

Pipe (in.) C p ≤ 0.50 0.5 < C p ≤ 0.71 0.71 < C P ≤ 1.40 C P ≥ 1.40

1 ⁄2 34 29 20 183 ⁄4 38 32 23 20

1 43 36 26 22

1 1 ⁄4 46 39 27 24

1 1 ⁄2 49 41 29 25

2 53 45 31 27

Note: For SI values, 1 in = 25.4 mm

Table 9.3.6.4(b) Maximum Spacing (ft) of CPVC and Copper Branch Line Restraints

Seismic Coefficient ( C p )

Pipe (in.) C p ≤ 0.50 0.5 < C p ≤ 0.71 C p > 0.71

3 ⁄4 31 26 18

1 34 28 20

1 1 ⁄4 37 31 22

1 1 ⁄2 40 34 24

2 45 38 27

Table 9.3.6.4(b) Maximum Spacing (ft), of CPVC and Copper Pipe Restraints

Seismic Coefficient C p

Pipe (in.) C p ≤ 0.50 0.5 < C p ≤ 0.71 0.71 < C P ≤ 1.40 C P ≥ 1.40

1 ⁄2 26 22 16 133 ⁄4 31 26 18 15

1 34 28 20 17

1 1 ⁄4 37 31 22 19

1 1 ⁄2 40 34 24 20

2 45 38 27 23

Note: For SI values, 1 in = 25.4 mm



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Revise_Tables_Section_9_3_6_4_a_b_-8-13-2013.docx




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Committee Statement

CommitteeStatement:

There are times when smaller diameter pipes are used and the tables have been expanded toprovide maximum restraint spacing for these pipes. A column has been added to account for thehigher values of CP which may occur due to the new USGS seismic hazard maps. The term “branchline has been changed to “pipe”, since these tables could be used for to determine the distancebetween restraints of small diameter pipe such as trim lines.

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208 of 474 11/7/2013 12:33 PM

Revise Tables 9.3.6.4(a), and (b) as follows:

Table 9.3.6.4(a) Maximum Spacing (ft), of Steel Pipe Restraints

Seismic Coefficient, CP Pipe (in) CP≤0.50 0.5<CP≤0.71 0.71<CP≤1.40 CP≥1.40

1/2 34 29 20 18 3/4 38 32 23 20 1 43 36 26 22

1 1/4 46 39 27 24 1 1/2 49 41 29 25

2 53 45 31 27 Note: For SI values, 1 in = 25.4 mm

Table 9.3.6.4(b) Maximum Spacing (ft), of CVPC and Copper Pipe Restraints

Seismic Coefficient CP Pipe (in) CP≤0.50 0.5<CP≤0.71 0.71<CP≤1.40 CP≥1.40

1/2 26 22 16 13 3/4 31 26 18 15 1 34 28 20 17

1 1/4 37 31 22 19 1 1/2 40 34 24 20

2 45 38 27 23 Note: For SI values, 1 in = 25.4 mm

A.9.3.6.4(a)

It is not the intent of this section to require restraint of piping associated with valve trim, water motor gong piping, air or nitrogen supply piping or other piping that is not essential to the operation of the sprinkler system. Essential piping such as fire pump sensing lines and diesel fuel lines are some examples of small piping which should be restrained.

Reason for Proposal

There are times when smaller diameter pipes are used and the tables have been expanded to provide maximum restraint spacing for these pipes. A column has been added to account for the higher values of CP which may occur due to the new USGS seismic hazard maps. The term “branch line has been

changed to “pipe”, since these tables could be used for to determine the distance between restraints of small diameter pipe such as trim lines.




9.3.8* Pipe Stands Subject to Earthquakes.

9.3.8.1

In areas where the horizontal force factor exceeds 0.5 Wp, pipe stands over 4 ft (1.2 m) in height shallbe certified by a registered professional engineer to be adequate for the seismic forces.

9.3.8.2

Where seismic protection is provided, concrete anchors used to secure pipe stands to their base shallbe in accordance with ACI 355.2, Qualification of Post-Installed Mechanical Anchors in Concrete andCommentary , and installed in accordance with manufacturer’s instructions.

9.3.8.3

Pipe saddles shall not be used to attach the system piping to the pipe stand.




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Committee Statement

CommitteeStatement:

The Committee has agreed that pipe stand requirements should be specified as part of the othersupport requirements for water-based fire protection systems. The text for the first revision has beenadapted from existing criteria in NFPA 15 as well as efforts from a task group on this subject. Thefollowing concepts that were sought to be incorporated were: an alternate requirement forprofessional engineers, material options for the pipe stand, addressing the slenderness ratio of pipe ina column, addressing thrust from system filling or dry applications, addressing the use of pipesaddles, interior versus exterior applications, addressing pipe stands when in areas subject to seismicrequirements. Other standards and model codes reference NFPA 13 for requirements on hanging,supporting and bracing water based fire protection equipment. The Committee and task grouprecognize that additional information will be needed at the second revision. Items anticipated includebase plate information, looped piping, and figures for clearer explanations.

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Documents

First Revision No. 141-NFPA 13-2013 [ Global Input ... · First Revision No. 141-NFPA 13-2013 [ Global Input ] 8.15.1.2.18 Exterior Soffits, Eaves, Overhangs, and Decorative Frame