Washington County, Maryland March 24, 2016 Building Code Info Meeting · · 2016-03-30March 24, 2016 Washington County, Maryland Overview Building Code Info Meeting washco-md.net

Washington County, Maryland Building Code Info Meeting March 24, 2016

March 24, 2016

Washington County, Maryland Building Code Info Meeting Overview

washco-md.net

December 1, 2015 – Public Hearing was held regarding the adoption of the 2015 codes.

December 15, 2015 - Washington County Commissioners voted to adopt the 2015 Maryland Building Performance Standards, the 2015 International Existing Building Code, trade codes, local amendments thereto, and related ordinance and resolution. The implementation date for these codes will be March 1, 2016.

All plans submitted after March 1, 2016 must be in compliance with the new codes

Inspections for permits issued after March 1, 2016 will be conducted under the new codes.

Any existing project or plans submitted prior to March 1, 2016 will be reviewed and inspected under the old codes

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Significant Changes to the IRC

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Change Summary: • The maximum height for accessory structures has been increased from two to

three stories above grade plane. Technical requirements have been removed from the definition, and accessory structures are now permitted to be unlimited in area.

• Definition: A structure not greater than 3,000 square feet (279 m2) in floor area,

and not more than two stories in height, the use of which that is customarily accessory to and incidental to that of dwelling(s) and which that is located on the same lot.

Section 101.2

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Change Summary: When proposed alternatives are not approved, the reason for the disapproval must be stated in writing by the building official.

Methods of Construction and Equipment Section 104.11

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Change Summary: • The provisions for fire protection of floors

have been relocated from Chapter 5 to the fire-resistant construction provisions of Section R302.

• New language clarifies that the code does not regulate penetrations or openings in the fire protection membrane. (Including floor truss/I-joists unless sprinklered.

Fire Protection of Floors – Section 302.13

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Change Summary: The minimum ceiling height for bathrooms, toilet rooms, and laundry rooms has been reduced to 6 feet 8 inches. The exception for allowing beams, girders, ducts, or other obstructions to project to within 6 feet, 4 inches of the finished floor has been expanded to include basements with habitable space.

Ceiling Height – Section 305.1.1

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Change Summary: Glazing installed perpendicular to a door in a closed position and within 24 inches of the door only requires safety glazing if it is on the hinge side of an in-swinging door.

Glazing Adjacent to Doors – Section 308.4.2

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Change Summary: Battery-operated smoke alarms are permitted for satisfying the smoke alarm power requirements when alterations, repairs, and additions occur. Household fire alarm systems no longer require monitoring by an approved supervising station. New provisions address smoke alarms installed near bathrooms and cooking appliances.

Smoke Alarms – Section 314

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Change Summary: Carbon monoxide alarms now require connection to the house wiring system with battery backup. Exterior work such as roofing, siding, windows, doors, and deck and porch additions no longer trigger the carbon monoxide alarm provisions for existing buildings. An attached garage is one criterion for requiring carbon monoxide alarms, but only if the garage has an opening into the dwelling. A carbon monoxide alarm is required in bedrooms when there is a fuel-fired appliance in the bedroom or adjoining bathroom. Carbon monoxide detection systems only require detectors installed in the locations prescribed by the code and not those locations described in NFPA 720.

Carbon Monoxide Alarms – Section 315

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Change Summary: • Anchor bolts are now required to be placed in the middle third of the sill plate.

Approved anchors may be used instead of ½-inch anchor bolts. • Bolts shall be located in the middle third of the width of the plate • Anchor bolts spaced a maximum of 4 feet on center or approved anchors or

anchor straps spaced to provide equivalent anchorage to ½-inch diameter (12.7mm) anchor bolts. (Local Amendment)

• Straps are not equivalent spaced

Foundation Anchorage – Section 403.1.6

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Change Summary: • The code sets the maximum allowable spacing for deck joists supporting the

various types of common decking materials.

• Wood-framed decks shall be in accordance with this section, or Section R301, for materials and conditions not prescribed herein. Where supported by attachment to an exterior wall, decks shall be positively anchored to the primary structure and designed for both vertical and lateral loads.

• Maximum allowable spacing for joists supporting decking shall be in accordance with Table R507.4. Wood decking shall be attached to each supporting member with not less than (2) 8d threaded nails or (2) No. 8 wood screws.

Decking – Section 507.1 and 507.4

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Table 507.4

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Change Summary: New sections and tables provide prescriptive methods for joists and beams in deck construction. Section R507.5 describes requirements for deck joists, Section R507.6 lists requirements for deck beams, and Section R507.7 describes minimum bearing requirements for joists and beams.

Deck Joists: Maximum allowable spans for wood deck joists, as shown in Figure R507.5, shall be in accordance with Table R507.5. Deck joists shall be permitted to cantilever a maximum of one-fourth of the actual, adjacent joist span.

Deck Joists and Beams – Section 507.5

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Deck Joists and Beams - continued

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Deck Beams: Maximum allowable spans for wood deck beams shall be in accordance with Table R507.6. Beam plies shall be fastened with two rows of 10d (3 inch by 0.128 inch) (76 mm by 3 mm) nails minimum at 16 inches (406 mm) on center along each edge. Beams shall be permitted to cantilever at each end up to one fourth of the actual beam span. Splices of multi-span beams shall be located at interior post locations.


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Deck Joists and Beams - continued

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• Deck Joist and Deck Beam Bearing: The ends of each joist and beam shall have no less than 1½ inches (38 mm) of bearing on wood or metal and not less than 3 inches (76 mm) on concrete or masonry for the entire width of the beam. Joist framing into the side of a ledger board or beam shall be supported by approved joist hangers. Joists bearing on a beam shall be connected to the beam to resist lateral displacement.


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Change Summary: • New Section R507.8 establishes

minimum sizes of wood posts supporting wood decks and describes the requirements for connection of deck posts to the footing.

• Deck Posts: For single-level, wood-framed decks with beams sized in accordance with Table R507.6, deck post size shall be in accordance with Table R507.8.

Deck Posts – Section 507.8

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Change Summary: The Fastening Schedule now contains multiple nail size options. Clarification of roof rafter connections at ridge, valley, and hip is added.

Fastening Schedule-Roof Requirements – Section 602.3(1)

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Change Summary: Changes to Southern Pine, Douglas Fir-Larch, and Hemlock Fir capacities have changed the maximum spans for lumber in the ceiling joist and rafter span tables of the International Residential Code.

Ceiling Joist and Rafter Tables – Section 802.4

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Change Summary:

The compliance paths in the energy provisions have been clarified. The mandatory provisions combined with either the prescriptive provisions or the performance provisions are deemed to comply with the code.

Compliance: Projects shall comply with one of the following:

– 1. Sections N1101.14 through N1104. (Prescriptive) – 2. Section N1105 and the provisions of Sections N1101.14 through N1104 labeled

“Mandatory.” (Simulated Performance Alternative)

– 3. An energy rating index (ERI) approach in Section N1106.

Compliance Paths – Section 1101.13

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Compliance Paths - continued

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Change Summary: Doors on wood-burning fireplaces must be listed for the application. The requirement for gasketed doors on fireplaces has been removed.

Fireplaces: New wood-burning fireplaces shall have tight-fitting flue dampers or doors, and outdoor combustion air. Where using tight-fitting doors on factory-built fireplaces listed and labeled in accordance with UL 127, the doors shall be tested and listed for the fireplace. Where using tight-fitting doors on masonry fireplaces, the doors shall be listed and labeled in accordance with UL 907.

Wood-Burning Fireplace Doors – Section 1102.4.2

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Significant Changes to the IBC

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Change Summary: Motor vehicles stored in a “private garage” are now limited through a new definition to only those vehicles used by tenants of the building or buildings on the same premises as the garage.

Private Garage: A building or portion of a building in which motor vehicles used by the tenants of the building or buildings on the premises are stored or kept, without provisions for repairing or servicing such vehicles for profit.

Definitions – Section 202

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Change Summary: • Small food processing establishments and

commercial kitchens not associated with dining facilities are now considered as Group B occupancies.

• Food processing establishments and commercial

kitchens not associated with restaurants, cafeterias and similar dining facilities not more than 2500 square feet (232 m2) in area.

Food Processing Facilities and Commercial Kitchens – Section 304.1

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Change Summary: • Lodging houses are now specifically defined in Chapter 2 and are typically

permitted to be constructed in accordance with the International Residential Code (IRC) if they contain no more than five guest rooms.

• Guest Room: A room used or intended to be used by one or more guests for living

or sleeping purposes.

• Lodging House: A one-family dwelling where one or more occupants are primarily permanent in nature and rent is paid for guest rooms.

Group R-3 Lodging Houses – Section 310.5

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Change Summary: • The allowance of a single-story basement in unlimited area buildings has now

been clarified.

• General: The area of buildings of the occupancies and configurations specified in Sections 507.1 through 507.12 shall not be limited. Basements not more than one story below grade plane shall be permitted.

Basements in Unlimited Area Buildings – Section 507.1

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Change Summary: • A more detailed analysis of various support spaces within a healthcare or

ambulatory care facility is now possible due to modifications to Table 509 regulating incidental uses.

• Separation and Protection: The incidental uses listed in Table 509 shall be

separated from the remainder of the building or equipped with an automatic sprinkler system, or both, in accordance with the provisions of that table.

Fire Protection from Incidental Uses – Section Table 509

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Table 509

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Table 509-continued

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Change Summary: • In the special provisions of Section 510.2 addressing pedestal buildings, there is no longer a limit of

one story above grade plane for that portion of the structure that occurs below the 3-hour horizontal separation.

• Horizontal Building Separation Allowance: A building shall be considered as separate and distinct

buildings for the purpose of determining area limitations, continuity of fire walls, limitation of number of stories and type of construction where all of the following conditions are met:

– 1. The buildings are separated with a horizontal assembly having a fire-resistance rating of not less than 3 hours. – 2. The building below the horizontal assembly is of Type IA construction. – 3. Shaft, stairway, ramp and escalator enclosures through the horizontal assembly

shall have not less than a 2-hour fire-resistance rating with opening protectives in accordance with Section 716.5

Horizontal Building Separation – Section 510.2

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Horizontal Building Separation - continued

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Change Summary: • Footnoted to Table 601 addressing 1-hour substitution has been deleted based

upon the extremely limited applicability of the footnote, along with the significant potential for misuse.

• General: The building elements shall have a fire resistance rating not less than

that specified in Table 601.

Table 601

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Table 601 - continued

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Table 601- continued

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Change Summary: • Walls of freezers and coolers located in buildings of Type I and II construction may now be constructed of

wood materials provided three conditions are met.

• Allowable materials: Combustible materials shall be permitted in buildings of Type I or II construction in the following applications and in accordance with Sections 603.1.1 through 603.1.3:

(Applications 1 through 25 remain unchanged.) • 26: Wall construction of freezers and coolers of less than 1000 square feet (92.9 m2), in size, lined on both

sides with noncombustible materials and the building is protected throughout with an automatic sprinkler system in accordance with Section 903.3.1.1

Wall Construction of Freezers and Coolers – Section 603.1

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Wall Construction of Freezers and Coolers – continued

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Change Summary: • The minimum required separation between the leading edge of a projection and the

line used to determine the fire separation distance has been modified in a manner that provides for a significant increase in the separation required.

• Projections: Cornices, eave overhangs, exterior balconies and similar projections

extending beyond the exterior wall shall conform to the requirements of this section and Section 1406. Exterior egress balconies and exterior exit stairways and ramps shall also comply with Sections 1021 and 1027, respectively. Projections shall not extend any closer to the line used to determine the fire separation distance than shown in Table 705.2.

• Exception: Buildings on the same lot and considered as portions of one building in

accordance with Section 705.3 are not required to comply with this section for projections between the buildings.

Projections at Exterior Walls – Section 705.2

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Projections at Exterior Walls-continued

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Change Summary: • An automatic sprinkler system is now required to be installed in a building when the roof is used

for a Group A-2 assembly occupancy with an occupant load exceeding 100, as well as for other Group A occupancies where the occupant load exceeds 300.

• Assembly Occupancies on Roofs: Where an occupied roof has an assembly occupancy with an

occupant load exceeding 100 for Group A-2 and 300 for other Group A occupancies, all floors between the occupied roof and the level of exit discharge shall be equipped with an automatic sprinkler system in accordance with Section 903.3.1.1 or 903.3.1.2.

• Exception: Open parking garages of Type I or Type II construction.

Sprinkler Systems-Assembly Occupancies – Section 903.2.1.6

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Change Summary: • An exemption for sprinkler systems in small resident bathrooms has been introduced into the IBC because

the provision was removed from the current edition of the referenced NFPA 13 standard.

• NFPA 13 Sprinkler Systems: Where the provisions of this code require that a building or portion thereof be equipped throughout with an automatic sprinkler system in accordance with this section, sprinklers shall be installed throughout in accordance with NFPA 13 except as provided in Sections 903.3.1.1.1 and 903.3.1.1.2.

• Exempt Locations: (No changes.)

• Bathrooms: In Group R occupancies, other than Group R-4 occupancies, sprinklers shall not be required in

bathrooms that do not exceed 55 square feet in area and are located within individual dwelling units or sleeping units, provided that walls and ceilings, including the walls and ceilings behind a shower enclosure or tub, are of noncombustible or limited-combustible materials with a 15-minute thermal barrier rating.

Exempt Locations for NFPA 13 Sprinklers – Section 903.3.1.1.2

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Change Summary: • Where an NFPA 13R sprinkler system is installed, the sprinkler protection must

now be extended to any open-ended corridors and associated exterior stairways, clarifying that an open breezeway is considered as an interior portion of the building and not an exterior location for the application of the sprinkler requirements.

• Open-Ended Corridors: Sprinkler protection shall be provided in open-ended

corridors and associated exterior stairways and ramps as specified in Section 1027.6, Exception 3.

Open-Ended Corridors – Section 903.3.1.2.2

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Open-Ended Corridors-continued

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Change Summary: • Additional restrictions have been placed on limited area sprinkler systems, including a

reduction in the system size to a maximum of six sprinklers within a single fire area.

• Installation Requirements: Automatic sprinkler systems shall be designed and installed in accordance with Sections 903.3.1through 903.3.86.

• Domestic Services: Where the domestic service provides the water supply for the

automatic sprinkler system, the supply shall be in accordance with this section.

• Number of Sprinklers: Limited area sprinkler systems shall not exceed six sprinklers in any single fire area.

Limited Area Sprinkler Systems – Section 903.3.8

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Change Summary: • The mercantile occupant load factor has been revised such that a single factor is

now applicable regardless of the story on which the mercantile use is located.

Occupant Load Factors – Table 1004.1.2

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Change Summary: • Locations where ladders can be used for access have now been identified and permanent ladders must follow the

construction requirements from the International Mechanical Code (IMC).

• Ladders: Permanent ladders shall not serve as a part of the means of egress from occupied spaces within a building. Permanent ladders shall be permitted to provide access to the following areas:

– 1. Spaces frequented only by personnel for maintenance, repair or monitoring of equipment. – 2. Non-occupiable spaces accessed only by catwalks, crawl spaces, freight elevators or very narrow

passageways. – 3. Raised areas used primarily for purposes of security, life safety or fire safety including, but not

limited to, observation galleries, prison guard towers, fire towers or lifeguard stands. – 4. Elevated levels in Group U not open to the general public. – 5. Non-occupied roofs that are not required to have stairway access in accordance with Section

1011.12.1. – 6. Ladders shall be constructed in accordance with Section 306.5 of the International Mechanical Code.

Ladders – Section 1011.16

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Change Summary: • An increased exit access travel distance is now permitted for Groups F-1 and S-1 occupancies

where specific requirements are met.

• Groups F-1 and S-1 Increase: The maximum exit access travel distance shall be 400 feet (122 m) in Group F-1 or S-1 occupancies where all of the following conditions are met:

– 1. The portion of the building classified as Group F-1 or S-1 is limited to one story in height.

– 2. The minimum height from the finished floor to the bottom of the ceiling or roof slab or deck is 24 feet (7315 mm). – 3. The building is equipped throughout with an automatic fire sprinkler system

in accordance with Section 903.3.1.1.

• Excerpts from Table 1017.2 (showing portions related to this item).

Travel Distance Increase for Groups F-1 and S-1 – Section 1017.2.2

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Travel Distance Increase for Groups F-1 and S-1 -continued

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Change Summary:

• Special inspections are now required during the installation of open web steel joists and joist girders, and a new table specifies the type of inspection and applicable referenced standard.

• Open-Web Steel Joists and Joist Girders: Special inspections of open web steel

joists and joist girders in buildings, structures and portions thereof shall be in accordance with Table 1705.2.3.

Open Web Steel Joists and Joist Girders – Section 1705.2.3

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Open Web Steel Joists and Joist Girders -continued

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Open Web Steel Joists and Joist Girders -continued

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Significant Changes to the IECC

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Change Summary: • Commercial buildings shall comply with one of the following:

– 1. The requirements of ANSI/ASHRAE/IESNA 90.1 – 2. The requirements of Sections C402 through C405. In addition, commercial buildings

shall comply with Section C406 and tenant spaces shall comply with Section C406.1.1.

– 3. The requirements of Sections C402.5, C403.2, C404, C405.2, C405.3, C405.4, C405.6 and C407. The building energy cost shall be equal to or less than 85 percent of the standard reference design building.

Commercial Energy Efficiency – Section C401.2

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Change Summary: The thermal envelope of buildings shall comply with Sections C402.5.1 through C402.5.8, or the building thermal envelope shall be tested in accordance with ASTM E 779 at a pressure differential of 0.3 inch water gauge (75 Pa) or an equivalent method approved by the code official and deemed to comply with the provisions of this section when the tested air leakage rate of the building thermal envelope is not greater than 0.40 cfm/ft2 Where compliance is based on such testing, the building shall also comply with Sections C402.5.5, C402.5.6 and C402.5.7.

Air Leakage – Thermal Envelope (Mandatory) Section C402.5

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Change Summary: •This section covers the commissioning of the building mechanical systems in Section C403 and electrical power and lighting systems in Section C405.

•Prior to the final mechanical and plumbing inspections, the registered design professional or approved agency shall provide evidence of mechanical systems commissioning and completion in accordance with the provisions of this section.

•Construction document notes shall clearly indicate provisions for commissioning and completion requirements in accordance with this section and are permitted to refer to specifications for further requirements. Copies of all documentation shall be given to the owner or owner’s authorized agent and made available to the code official upon request in accordance with Sections C408.2.4 and C408.2.5.

System Commissioning – Section C408.1 and C408.2

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Exceptions: The following systems are exempt: • 1. Mechanical systems and service water heater systems in buildings where

the total mechanical equipment capacity is less than 480,000Btu/h (140.7kW) cooling capacity and 600,000 Btu/h (175.8 kW) combined service water-heating and space-heating capacity.

• 2. Systems included in Section C403.3 that serve individual dwelling units and

sleeping units.

System Commissioning – Section C408.1 and C408.2 - continued

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Change Summary: • Heated water circulation systems shall be provided with a circulation pump. The

system return pipe shall be a dedicated return pipe or a cold water supply pipe. Gravity and thermosyphon circulation systems shall be prohibited. Controls for circulating hot water system pumps shall start the pump based on the identification of a demand for hot water within the occupancy. The controls shall automatically turn off the pump when the water in the circulation loop is at the desired temperature and when there is no demand for hot water.

Circulation Systems – Section R403.5.1.1

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Change Summary: • A water distribution system having one or more recirculation pumps that

pump water from a heated water supply pipe back to the heated water source through a cold water supply pipe shall be a demand recirculation water system. Pumps shall have controls that comply with both of the following: – 1. The control shall start the pump upon receiving a signal from the action of a user of a

fixture or appliance, sensing the presence of a user of a fixture or sensing the flow of hot or tempered water to a fixture fitting or appliance.

– 2. The control shall limit the temperature of the water entering the cold water piping to 1040F (400C).

Demand Recirculation Systems – Section R403.5.2

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Change Summary: • Insulation for hot water pipe with a minimum thermal resistance (R-value)

of R-3 shall be applied to the following: – 1. Piping ¾ inch (19.1 mm) and larger in nominal diameter. – 2. Piping serving more than one dwelling unit. – 3. Piping located outside the conditioned space. – 4. Piping from the water heater to a distribution manifold. – 5. Piping located under a floor slab. – 6. Buried in piping. – 7. Supply and return piping in recirculation systems other than demand recirculation

systems.

Hot Water Pipe Insulation (Prescriptive) – Section R403.5.3

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Significant Changes to the NEC

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Change Summary: • Requirements for GFCI protection in dwelling unit kitchens have been expanded.

• A new subdivision (D) titled Kitchen Dishwasher Branch Circuit has been added to

210.8

• Outlets supplying dishwasher are required to be GFCI protected

Kitchen Dishwasher Branch Circuit – Section 210.8 (D)

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Change Summary: • This section has been revised to require

arc-fault circuit interrupters to be installed in readily accessible locations.

• Subdivision (A) now recognizes arc-fault circuit interrupter protection requirements have been expanded to kitchens and laundry areas

Arc-Fault Circuit-Interrupter Protection – Section 210.12

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Change Summary: • A new subdivision (C) titled Dormitory

Units has been added to 210.12

• The AFCI protection requirements are expanded to outlets installed in dormitory unit bedrooms, living rooms, hallways, closets, and similar rooms

• This new subdivision continues the incremental expansion of AFCI protection for dwelling units

AFCI Protection – Dormitory Units – Section 210.12 (C)

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Change Summary: • A new informational note has been added

following 210.50 to correlate with new Annex J

• Reference is made to a new Annex J that provides specific guidelines on ADA accessibility design

• Outlet and switch box locations in other than dwelling units are often impacted by requirements in ANSI 117.1 Accessible and Usable Buildings and Facilities

ADA Accessibility Design Requirements – Section 210.50

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Change Summary: • List item (3) in 210.52(E) has been revised for clarity and more uniform application

• The revision clarifies that the balcony, deck, or porch must be attached to the

dwelling unit

• As revised the required receptacle outlet must be accessible from the balcony, deck, or porch walking surface

Balconies, Decks and Porches – Section 210.52 (E)(3)

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Significant Changes to the IPC

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Change Summary: • The application of a primer to drain, waste and vent PVC pipe and fittings prior to solvent

cementing is not required for 4-inch pipe size and smaller.

• Solvent Cementing: Joint surfaces shall be clean and free from moisture. A purple primer that conforms to ASTM F 656 shall be applied. Solvent cement not purple in color and conforming to ASTM D 2564, CSA B137.3, CSA B181.2 or CSA B182.1 shall be applied to all joint surfaces. The joint shall be made while the cement is wet and shall be in accordance with ASTM D 2855. Solvent-cement joints shall be permitted above or below ground.

• Exception: A primer is not required where both of the following conditions apply:

1. The solvent cement used is third-party certified as conforming to ASTM D 2564. 2. The solvent cement is used only for joining PVC drain, waste and vent pipe and fittings in non-pressure applications in sizes up to and including 4 inches (102 mm) in diameter.

Exception for Solvent Cementing PVC Piping 4 Inches and Smaller – Section 705.11.2

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Exception for Solvent Cementing PVC Piping 4 Inches and Smaller – continued

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Significant Changes to the IMC

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Change Summary: • The exception allows for fall-

arresting restraint systems to be employed instead of guards on roofs.

Fall-Arresting Restraint Systems – Section 304.11

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Change Summary: • More than just appliances are now required to have access for inspection, service,

replacement and repair.

• Access: Appliances, controls devices, heat exchangers and HVAC system components that utilize energy shall be accessible for inspection, service, repair and replacement without disabling the function of a fire-resistance-rated assembly or removing permanent construction, other appliances, venting systems or any other piping or ducts not connected to the appliance being inspected, serviced, repaired or replaced. A level working space at least 30 inches deep and 30 inches wide (762 mm by 762 mm) shall be provided in front of the control side to service an appliance.

Access – Section 306.1

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Change Summary: • Condensate pumps located in

uninhabitable spaces and used with condensing fuel-fired appliances and cooling equipment must be connected to the appliance or equipment served by the pump to prevent water damage in the event of pump failure.

Condensate Pumps in Uninhabitable Spaces – Section 307.3

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Change Summary: • Occupancies including hospitals, nursing homes, detoxification facilities and

ambulatory care facilities must be ventilated in accordance with a new standard, ASHRAE 170.

• Mechanical ventilation for ambulatory care facilities and Group I-2 occupancies shall be designed and installed in accordance with this code and ASHRAE 170.

Ventilation Required – Section 401.2 and 407.1

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Change Summary: • The adjective “public” was added to “nuisance” to make this requirement more enforceable. The new

exception correlates with Section 505.1, exception 1.

• Exhaust Discharge: The air removed by every mechanical exhaust system shall be discharged outdoors at a point where it will not cause a public nuisance and not less than the distances specified in Section 501.3.1. The air shall be discharged to a location from which it cannot again be readily drawn in by a ventilating system. Air shall not be exhausted into an attic, crawl space, or be directed onto walkways.

Exceptions:

• 1. Whole-house ventilation-type attic fans shall be permitted to discharge into the attic space of dwelling units having private attics.

• 2. Commercial cooking recirculating systems. • 3. Where installed in accordance with the manufacturer’s instructions and where mechanical

or natural ventilation is otherwise provided in accordance with Chapter 4, listed and labeled domestic ductless range hoods shall not be required to discharge to the outdoors.

Mechanical Exhaust System Discharge – Section 501.3

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Change Summary: • New text recognizes the use of dryer exhaust duct power ventilators (DEDPVs) for

installations that exceed the allowable exhaust duct length for clothes dryers.

• Dryer Exhaust Duct Power Ventilators: Domestic dryer exhaust duct power ventilators shall be listed and labeled to UL 705 for use in dryer exhaust duct systems. The dryer exhaust duct power ventilator shall be installed in accordance with the manufacturer’s instructions.

• Dryer Exhaust Duct Power Ventilator Length: The maximum length of the exhaust duct shall

be determined by the dryer exhaust duct power ventilator manufacturer’s installation instructions.

Dryer Exhaust Duct Power Ventilators – Section 504.5 and 504.8.4.3

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Change Summary: A requirement has been added for Type I hood installations to comply with all aspects of a Type I exhaust system, whether the Type I hood is required by the code or installed by choice.

Commercial kitchen exhaust hoods shall comply with the requirements of this section. Hoods shall be Type I or II and shall be designed to capture and confine cooking vapors and residues. A Type I or Type II hood shall be installed at or above all commercial cooking appliances in accordance with Sections 507.2 and 507.3. Where any cooking appliance under a single hood requires a Type I hood, a Type I hood shall be installed. Where a Type II hood is required, a Type I or Type II hood shall be installed. Where a Type I hood is installed, the installation of the entire system, including the hood, ducts, exhaust equipment and makeup air system shall comply with the requirements of Sections 506, 507, 508 and 509. Commercial kitchen exhaust hood systems shall operate during the cooking operation.

Type I Hood Installation – Section 507.1

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Type I Hood Installation - continued

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Change Summary: • This new section requires that an air balance schedule be

submitted with the design plans for commercial kitchen ventilation systems.

• Design plans for a facility with a commercial kitchen ventilation

system shall include a schedule or diagram indicating the design outdoor air balance. The design outdoor air balance shall indicate all exhaust and replacement air for the facility, plus the net exfiltration if applicable. The total replacement air airflow rate shall equal the total exhaust airflow rate plus the net exfiltration.

Air Balance for Commercial Kitchen Ventilation Systems – Section 508.1.2

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Change Summary: • The table for duct gages for dwelling units

has been replaced with thicknesses consistent with the SMACNA sheet metal construction standard.

Duct Construction Minimum Sheet Metal Thickness for Single Dwelling Units – Section 603.4

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Change Summary: • Where dampers are installed on combustion air openings, the code now requires

an interlock with the appliance to prevent operation of the appliance when the damper is closed. Manual dampers are prohibited on combustion air openings.

• Dampered Openings: Where combustion air openings are provided with volume,

smoke or fire dampers, the dampers shall be interlocked with the firing cycle of the appliances served, so as to prevent operation of any appliance that draws combustion air from the room or space when any of the dampers are closed. Manual dampers shall not be installed in combustion air ducts. Ducts not provided with dampers and that pass through rated construction shall be enclosed in a shaft in accordance with the International Building Code.

Dampered Openings – Section 701.2

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Dampered Openings - continued

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Work Exempt From a Permit: • One-story detached accessory structures, of wood or metal construction, not used for human habitation,

provided the floor area does not exceed 400 square feet.

• Residential decks not exceeding 200 square feet in area, that are not more than 30 inches above grade at any point, are not attached to a dwelling, do not serve the exit door required by Section R311.4 will no longer require a permit.

• Retaining walls that retain less than 36-inches of unbalanced backfill unless supporting a surcharge or

impounding Class I, II or IIIA liquids.

• Prefabricated swimming pools accessory to a Group R-3 occupancy, as applicable in Section 101.2, which are less than 24 inches deep.

• Noncombustible awnings or canopies shaped to positively shed snow and supported by an exterior wall that do

not project more than 54 inches from the exterior wall and have a maximum height of four (4) feet and a maximum width of eight (8) feet. Awnings or canopies with proposed lighting as an integral part or that are intended to be used as a sign shall require a permit.

Local Amendments

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Definitions: • Agricultural Building: A structure designed and constructed to house farm

implements, hay, grain, poultry, livestock or other horticultural products. This structure shall not be a place of human habitation or a place of employment where agricultural products are processed, treated, or packaged, nor shall it be used by the public.

• Definition of agricultural buildings was revised to coincide with the definition in the International Building Code.

• Copies of the local amendments can be obtained at www.washco-md.net

Local Amendments - continued

http://www.washco-md.net/

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• Legislation is being proposed for Washington County to extend the code cycle adoption from every (3) years to every (6) years

• 2015 International Existing Building Code

• Additional Permit Technician

• Infrastructure Plating Initiative

• Same Day Permits on Wednesdays between 7:30 a.m. to 11:30 a.m.

Division Director Comments

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Same Day Permits/Appointments

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• Division is in the process of upgrading its current software system to a new web-based program called Accela Automation

• Process began a year ago and implementation to be completed within the

next 3-4 months

• Improve customer service with citizen engagement through expanding online permitting to include some building permits as well

• Streamline fee calculations and assessments through paying online 24 hours a day

• Upgrade will enable electronic plan submission

Software Upgrade

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Permits by Appointments: • Applications will be accepted on Tuesdays and Thursdays from 8:00 a.m. to 3:00

p.m.

• No appointments will be scheduled from 12:00 p.m. – 2:00 p.m. (lunch shifts)

• Only single building permit applications will be processed during appointment times.

• Call 240-313-2460 to schedule your appointment

Division Director Comments - continued

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Q&A

Washington County, Maryland Building Code Info Meeting Stay Connected

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Robert Slocum, Director Engineering & Construction Management Washington County, MD [email protected] 240.313.2418

March 24, 2016 washco-md.net

Documents

Washington County, Maryland March 24, 2016 Building Code Info Meeting · · 2016-03-30March 24, 2016 Washington County, Maryland Overview Building Code Info Meeting washco-md.net