AT&T General Practices: 002-290-341

8/10/2019 AT&T General Practices: 002-290-341

1/36

ATT-002-290-341

MSC Construction Standards Guideline

Abstract:

This document was converted " as-is" from Mobility Network Services SharePoint to APEx in 06/2010.Original

document f ilename: NG-0004

Audience:

State(s): Vendor(s):

Product Name:

Effective Date:

Published : Issue 2, 01/05/11

Expires On: NA

Related Documents:

Canceled Documents:

Business Unit:

Author(s):

Huel Halliburton ATTUID

AT&T Practice ATT-002-290-341

Issue 2, 01/05/11

AT&T Proprietary (Internal Use Only)

Not for use or disclosure outside the AT&T companies, except under written agreement.

2011 AT&T Intellectual Property. All rights reserved.

i


2/36

Table Of Contents

INTRODUCTION

Reason For Current Issue

1. Site Plan Guidelines 22. Build ing Envelope Guidelines 3

2.1. General 3

2.2. Roof System 3

2.3. Floor Plan and General Construction 4

2.4. Restrooms 5

2.5. Clear Height Dimensions 5

2.6. Diverse and Redundant Facilities Construction Requirements 5

2.7. Building Ground Ring Design 5

2.8. Finishes 63. Structural Guidelines 6

3.1. General Information 6

3.2. Design Loads 7

4. Mechanical System Guidelines 8

4.1. Introduction 8

4.2. Capacity Design 8

4.3. Redundancy 8

4.4. Outdoor Design Parameters 9

4.5. Indoor Design Parameters 94.6. Facili ty Automation, Controls , and Alarms Management 10

4.7. Telecommunication Equipment Space (including Teleco Area) 10

4.8. Control Room 11

4.9. DC Power Rooms 11

4.10. Offices and Adminis trative Areas 12

4.11. Standby Engine/Fuel Storage Rooms 12

4.12. Smoke Management Systems 13

5. Fire Protection System Guidelines 13

5.1. Introduction135.2. Fire Alarm System 13

5.3. Alarm Processing 14

5.4. Portable Fire Extinguishers 14


Issue 2, 01/05/11




ii


3/36

5.5. Incoming Fire Protection /Domestic Water Service 14

5.6. Means of Egress 14

5.7. Protection From Exposures 15

5.8. Telecommunication Equipment Space (includes Teleco Room/Area) 15

5.9. Control Room165.10. Switch AC and DC Power Rooms 16

5.11. Standby Engine/Fuel Storage Rooms 17

5.12. Administrat ive Offi ce 18

5.13. Storage Rooms 19

5.14. Smoke Management System 19

6. Electrical System Guidelines 20

6.1. Introduction 20


6.3. Redundancy 20

6.4. Minimum Requirements 21

6.5. Emergency Power 21

6.6. Surge Protection 22

6.7. Interior Lightning 22

6.8. Exterior Lightning 23

6.9. Emergency Interior Illumination 23

6.10. Transport Room 24

6.11. Emergency Generators 24

7. Lightning Protection System Guidelines 24

7.1. Introduction 24


8. DC Power Room 25

8.1. Power and Battery Room Minimum Requirements 25

8.2. Plant Floor Loading 25

8.3. AC Junct ion Boxes for Rectif ier 25

8.4. AC Inverter Specifications 26

8.5. Rack Grounding 26

9. Security System Guidelines 26

10. Alarm Management 26

10.1. Building and Equipment Alarms 26

11. OSS/NOC Requirements 31


Issue 2, 01/05/11




iii


4/36

11.1. IT LAN/WAN Racking 31

11.2. NOC (Network Observations Center) 31

12. Miscellaneous 31

12.1. Telephony and Power Cable Trays 31

12.2. Raised Floor ing3213. Blank Chapter 32

A.1. Document Specific Acronyms 32

A.2. Acronyms Dictionary 32

Revision Log 32

ACRONYMS 32


Issue 2, 01/05/11




iv


5/36

Reason For Current Issue

Issue Number Date Description Published By

2 01/05/11 Please note that sd0987 is

not the owner/author of this

document. Sd0987 is onlycorrecting a technical error

as part of the APEx Strategy

Team. See name listed in

Author tag for content related

questions.

sd0987

INTRODUCTION

The intent of this document is to provide general guidance in the design philosophy of Cingular switch buildings.

MSC Construction Standards Guideline

AT&T Mobility Network Services Guideline NG-0004 Rev. 2.1 2/2/09

Cingular Wireless - Project Iron Horse

Overview

The intent of this document is to provide general guidance in the design philosophy of Cingular switch buildings. Specif-

ically this document will address the overall building layout, HVAC and environmental concerns, Commercial AC power,

Transport equipment rooms, DC power rooms, Standby power systems, OSS, Fire detection and suppression, Adminis-

trative workspace, and Interior support systems.

Revision History

This table identifies content revisions made to this document.

Date Rev Revision Description Writer Sponsor

1/19/05 1 Release Version 1 Huel Halliburton Charles Oscarson

7/12/06 2 Release Version 2 Teng & Associates Dick Westrum


Issue 2, 01/05/11




1


6/36

1. Site Plan Guidelines

Regional land costs shall be considered when a site for a typical MSC is chosen. Sites should be selected to provide

growth for the facility that is appropriate for the market growth potential. Projects are normally short fused; sites with proper

zoning are preferred.

Site selection shall encompass environmental, seismic, hurricane, tornado, wind and snow, wildfires, floods, etc risk

assessment. No site shall be selected in a 100-year flood plain, or below sea level.

A parking area, which provides parking for a minimum of fifteen employee vehicles, is to be provided. All parking areas

are to be hard surface, concrete or asphalt specified for truck traffic. All asphalt and concrete shall be per city or DOT

specifications. Temporary parking is to be provided to code standards. All walks are to be constructed of reinforced

concrete with a minimum width of 5'. Handicap parking is to be provided per ADA and local code requirements.

The finished floor shall be set to minimize the amount of earth movement but above the 100-year storm event. The site

shall provide a minimum one surface outfall for storm water runoff. All parking and sidewalks are to be sloped away for

the building. No storm water runoff is to drain towards or accumulate near the building. Roof drains will connect directly

to the underground storm drain system. The storm drain pipes shall have a minimum 1% slope. Pipe sizing and material

shall be per city or DOT specifications. Any construction disturbance greater than one acre requires a Storm WaterPollution and Prevention Plan as defined by the city or the county.

Water and sanitary sewer shall be per locally adopted Building and Plumbing Codes and any local supplements or

amendments to those codes. Any work in the Rights of Way shall be per city or DOT specifications. Fire lines to be per

locally adopted Fire Code and any local supplements or amendments to that code.

Exterior access should provide for typical panel size truck deliveries, but adequate enough as to provide infrequent semi-

trailer truck deliveries. Maneuvering space for the semi can overlap employee parking and drive access if necessary. A

loading dock leveler and rain protection for the dock is required.

Communications is to be provided via two underground telephone cable entrance routes or right of ways, preferably at

opposite sides of the building. It's acceptable that the conduit run under the building and PVC is acceptable for this

purpose. These conduits shall be placed during foundation construction for the structure. Where running outside thefootprint of the building, these and all other conduits shall be encased in concrete. In general, underground conduits and

exterior equipment should not be placed in areas slated for future building expansion.

All generators, fuel tanks, HVAC or other equipment located outside of the building are to be located in a secured area.

This area should be secured by a (minimum) seven-foot high fence with an additional foot of three-strand barbed wire

providing a total of eight feet of fencing. Access to this area is to be via a lockable gate. Where the security fence encloses

areas used for egress from the building, gates shall be provided with panic bars to permit exit access away from the

structure. At sites where local authorities do not permit chain-link fencing or barbed wire, alternate fence or screen wall

materials may be used per the authorities' direction. The generator is to be installed within a walk-in outdoor rated enclo-

sure. In addition, above ground fuel tanks are to be to be surrounded with vehicular barrier devices to inhibit incidental

and intentional vehicle impact. Where zoning or ordinances will not allow for the above requirements, Network personnel

and Real Estate personnel shall be contacted to review possible alternative solutions. Spill containment shall be provided

per EPA and local regulations.


Issue 2, 01/05/11




2


7/36

Exterior lighting shall produce sufficient foot-candles as to provide il lumination for effective operation of video equipment

at night. Metal halide lighting source is preferred over high-pressure sodium. Local 'illumination pollution' regulations shall

be respected.

Where possible design the building with natural or manmade barriers that would prevent incidental or intentional vehicle

damage to the building.

Landscape materials and landscape maintenance are to be minimized but kept in compliance with the local landscape

ordinance. An automated irrigation system is to be installed, should greenery be required by local codes. Provide splash

blocks at drain locations where condensation lines or the building fire sprinkler are released at grade.

One 2" wall penetration on the southern wall is required to accommodate the GPS with a NEMA box on the interior and

exterior.

2. Building Envelope Guidelines

2.1. General

Typically a new Mobile Switching Center (MSC) is a one story, slab on grade building with a concrete, steel or load-bearing

masonry structure and concrete or masonry exterior walls. Sizes range from 9000 to 14000 sq. ft. Design time frame is

typically 60 days and the time frame for construction is six months.

The MSC floor plan, structure and infrastructure shall be designed to accommodate a 2500 sf. future growth of the switch

room and DC power plant room to include the mechanical and electrical systems. A small administrative space and

ancillary spaces are to be provided, see 'prototype floor plan'.

All MSC building designs are to comply with the appropriate local and national codes and ordinances as well as Cingular

Wireless policy letters and standards. MSC buildings are to be designed to meet local design conditions, environmental,

seismic, hurricane, tornado, wind and snow, wildfires, floods, etc. No building shall be built in a 100-year flood plain, or

below sea level.

Cingular may provide insurance oversight to review documents for compliance.

2.2. Roof System

The goal is no roof penetrations. If roof penetrations are required, they shall not be located -over any switch equipmentareas. Roof hatches are not recommended unless necessary for equipment maintenance. If roof hatches are used, they

must provide a locking mechanism, which is only accessible from the interior. In addition the roof hatch should be alarmed


Issue 2, 01/05/11




3


8/36

as with all exterior points of entry. If roof hatches are used, provide an internal roof access ladder for maintenance. Where

no hatch is provided a ladder is not required.

The roof is to be designed for the maximum uplift in the area of the country in which the building is to be built but not less

than that list in the Structural Guidelines section of this report. The minimum wind uplift classification is to be Class 1A-105.

Roof system type is to be determined by geographic location. A fully adhered single-ply membrane roofing system is

preferred especially in areas subjected to hurricane force winds. No ballasted roof systems are to be used. At a minimumthe roof system must be provided with a 15-year warranty.

The roof shall provide a positive drainage, ' per foot, and preferably with no interior roof drains penetrating the membrane.

Minimize roof parapets. Positive roof slope to scupper drains to be provided.

2.3. Floor Plan and General Construct ion

A non-combustible structure with masonry or concrete exterior walls is preferred. The insulation is to be designed to meet

federal and local energy code requirements. A 40-year building life is anticipated.

The number of exterior penetrations shall be minimized. No windows are required. The use of any windows requiredregionally is to be limited to administrative areas and shall be provided with high strength glass and hurricane shutters if

in a hurricane-prone region. A durable canopy is to be installed over the main entrance door and the door and dock to

the staging and storage area. Measures shall be taken to minimize the risk of unauthorized entry through any windows.

In shopping mall locations, an interior wall shall be constructed to isolate the switch equipment from windows and to limit

switch exposure. All exterior windows must be vandal resistant with impact resistant glazing to protect from both flying

debris and vandalism. The preference is for no windows or exterior wall penetrations in equipment areas.

The DC battery room will be designed with a depressed floor slab to create a containment area to accommodate 150%

of the total stored capacity of any hazardous material spill (i.e., battery acid). Each battery storage area shall have a

personnel eyewash/decontamination area. A shower for drenching shall also be providing in new facilities. Provide an

acid resistant epoxy floor finish throughout this room and at the sides of the containment area.

All openings in fire rated walls and ceilings to conform to NFPA requirements. All cable holes are to have a Hilti firestoppingassembly having a fire resistance rating equivalent to the wall.

A threaded rod grid system from the roof (refer to MSC Structural Guidelines for additional details) shall support the

overhead suspended cable ladder system. A suspended cable racking system is required above the switch, Teleco, and

power equipment areas. A horizontal cable ladder layout is to be determined by a Network engineer on a per site basis.

Overhead cable ladder material and installation services shall be provided by Cingular. The placement and the installation

of the cable ladder is to be coordinated with the Cingular architect to ensure the cable ladder will work in concert with

ductwork, diffusers, and interior lighting placement.

Provide framed openings in walls for cable tray penetrations. Quantity, location and size of wall openings shall be deter-

mined by the Cingular Building Engineer assigned by Cingular regional management to the specific project.

A dropped slab is required for emergency engine room if located within the building.


Issue 2, 01/05/11




4


9/36

The design shall include possible future expansion of the telephone switch (see schematic floor plan). Consideration

should be given to block-outs in exterior walls for access to expansion areas.

Doors and frames must be of steel type or equivalent with non-removable pin ball bearing hinges and heavy-duty steal

bolts. All exterior doors, doors to Teleco equipment rooms and the control room are to have card readers (see security)

with a mechanical key lockset as a back up. All exterior doors must be self-locking and have alarm contacts installed. The

preferred hardware vendor is Stanley/Best. Required components not manufactured by Stanley/Best are to be of similarquality and durability. All doors where equipment are to be transported through to be a minimum 8'-0' high and 42' wide.

All doors are to be fire rated in compliance with the Building Code and NFPA requirements to meet the rating of the walls

in which they are installed with the additional requirement that 1-hour rated walls are to receive doors with a full 1-hour

fire rating and exterior wall are to receive doors with a 1-1/2-hour fire rating. Doors at the front entry and vestibule are not

required to be fire rated unless so required by the Code.

2.4. Restrooms

ADA compliant male and female restrooms shall be provided, with a shower in one or the other. An accessible water

cooler shall be provided either outside the restrooms or in the Break Room.

2.5. Clear Height Dimensions

Clear height floor to bottom of any obstruction, ducts, sprinkler heads, conduit, etc. shall be 12'-0', minimum.

2.6. Diverse and Redundant Facil ities Construction Requirements

Facility entrance into building shall be via two sets of underground - PVC conduits (ductbank). Each ductbank shall consist

of three PVC conduits suitable for direct burial, and shall have at least a 6' but no more than 8" inside diameter. End screw

caps for each PVC conduit in each ductbank is to be provided. Each PVC conduit shall have a 200 lb. pull rope installed.Each PVC conduit shall terminate in the Teleco room 6 inches above the slab, with 2-4' separation between conduits,

and conduits and walls. There shall be a minimum separation between individual -conduit in each ductbank of at least

two inches, but no more than four inches. There shall be a minimum separation of each ductbank of at least 25 feet or

preferably ingress the building from opposite sides of the building. Each ductbank shall enter the Teleco area of the

building vertically through the concrete floor with a minimum 10 ft. separation or greater between ductbanks. All grouped

conduits that extend out of the floor slab shall have a 4' high concrete housekeeping curb around them.

2.7. Bui lding Ground Ring Design

Refer to Cingular Grounding Standard Policy Letter 0028

Grounding Standard Policy Letter


Issue 2, 01/05/11




5
http://networkops.sbms.sbc.com/nis/NIS%20Web%20Project%20Folders/Operations%20Support/Network%20Operations%20Practices/Policy%20Letters/2001/01-0028%20Grounding%20Standard%20PL%20v2.doc


10/36

2.8. Finishes

All telecom equipment areas are to be VCT floors, painted walls and sealed or painted ceiling structure. There is to be

no acoustical ceiling tile in telephone equipment areas and equipment growth areas.

Administration area requirements are as follows: VCT or carpet tile floors, painted walls and exposed structure painted

or acoustical tile suspended ceilings. Acoustical tile is to be limited to administrative, restroom, control room, and other

ancillary areas. If a shower is provided, moisture-resistant drywall is to be provided for the toilet room ceilings.

Restrooms and break area requirements are as follows: VCT or ceramic tile floors, painted walls and exposed structure

painted or acoustical tile or drywall ceiling suspended. Bathrooms and shower room (if provided) to have moisture-resist-

ant gypsum board walls and ceilings.

Control room to have carpet tile or VCT floors, painted drywall and acoustical tile ceiling. No window into the switch room

is required (may be specified by local regions). Window in door between switch room and control room to be provided.

Mechanical rooms, the receiving area and other services spaces are to have a sealed concrete floor finish. There is to

be no finish on ductwork.

Oversized doors, 3'6 X 8'0 (minimum) are to be used for equipment passage.

Raised flooring is not required and will only be considered for 'special' installations. Financial justification for raised floors

shall be submitted and approved by Network personnel or the Real Estate group.

All conduits are to be surface mounted except in finished non-equipment spaces.

"Authorized Cingular Personnel Only" signs must be posted prominently on all interior doors to switch, Teleco, DC power,

generator, AC power, and control rooms. If a building is unmanned or for unique applications, the exterior door signs may

be omitted to prevent drawing undue attention to the site.

3. Structural Guidelines

3.1. General Information

The prototype MSC design shall consist of a one-story building with concrete masonry or pre-cast concrete shear walls

with interior load-bearing walls as required to support a pre-cast concrete roof system or a cast-in-place concrete roof

slab. The ground floor structure and foundations for the building shall consist of a slab on grade with strip footings under-neath the perimeter and interior load bearing walls. If conditions are not appropriate for slab on grade and strip footings,

then the appropriate foundation system shall be evaluated based on the region and soil characteristics where the building

will be located.


Issue 2, 01/05/11




6


11/36

3.2. Design Loads

The prototype MSC building shall be designed in accordance with the following design loads per the International Building

Code, 2000 Edition, or in accordance with the local governing code and ordinances at the location where the building will

be located. The design loads shall take into account an importance factor for environmental loads that reflect an essentialfacility design. All loads are in addition to the self-weight of the structure.

Wind Loads:

Basic Wind Speed - As determined by the site specific location

Exposure - As determined by the site specific location

Building Category - III

Importance Factor, I - 1.15

Design Wind Pressure - As determined by the design engineer based on criteria above

Snow Loads:

Ground Snow Load, Pg - As determined by the site specific location

Importance Factor, I = 1.20

Snow Exposure Factor, Ce - As determined by the site specific location

Thermal Factor, Ct = 1.0

Flat Roof Snow Load, Pf - As determined by the design engineer based on criteria above

Seismic Loads:

Seismic Use Group - III

Importance Factor, I = 1.50

Spectral Response Accelerations and Coefficients: As determined by the site specific location

Site Class - As determined by the site specific location

In addition to the loading listed above, the roof shall support a dead load of 50 pounds per square foot from hanging

switchgear cables in the switch, telecommunications, and power equipment areas and 10 pounds per square foot for

Mechanical/ Electrical/ Plumbing items in all other areas of the building through a slotted channel system supported by a

4'-0' x 4'-0' grid of ' diameter threaded rods attached to the underside of the roof structure. Floor loads in the battery

room shall be designed for 300 pounds per square foot and the floor slab shall be depressed for battery containment. All

other areas shall be designed for a floor load of 150 pounds per square foot.


Issue 2, 01/05/11




7


12/36

4. Mechanical System Guidelines

4.1. Introduction

This document contains general guidelines for the design and selection of heating, ventilation, and air conditioning equip-

ment and systems for MSC buildings. The purpose of these guidelines is to optimize life cycle costs while providing a

reasonable level of reliability.

A proper HVAC design must at the minimum address capacity design, redundancy, ease of maintenance and proper

component (e.g., individual chiller size and type) sizing and selection through the use of life-cycle analysis. In order to

address these issues, the designer has to perform certain tasks as outlined in this standard. Elimination of one of more

tasks can lead to poorly designed systems, higher life-cycle costs and subsequent redesign or replacement.

4.2. Capacity Design

Although the predominant load in the MCS is from Network Equipment (i.e., Telephone equipment) loads, local environ-

mental conditions, the resulting envelope loads and operating conditions must be considered in designing the capacity

of an HVAC plant.

The cooling load for existing equipment shall be sized to the actual output of the rectifiers in the DC Power Plant associated

with said equipment. The MSC Engineer shall provide future Network Equipment heat loads. In situations where the

planned values are not available, the consultant shall use the values listed in the manufacture's literature or based upon

actual loads determined from similar MSC installations. These values should only be applied to the square footageassociated with the equipment footprint and the access and service isles in the immediate area of the equipment. Refer

to the referenced MSC switch manufactures and Power room equipment information.

For new MTSO facilities, the equipment cooling load shall be sized for 80 W/SFof the equipment footage area plus the

access and service isles in the immediate area of equipment.

4.3. Redundancy

An 'N+1' (N-plus-one) redundancy configuration is defined as a system equipped with one additional standby unit (i.e.,

beyond the current load) such that, in the case of failure of one chiller or DX unit, the remaining chillers or DX units are

able to maintain nominal temperatures within the specified temperature guidelines, table 2.1, during 100% of the facility'sannual operating conditions. For example, in the case of a 180 ton chilled water plant equipped with three 60-ton chillers,

and a current load of 120 tons, the loss of any one chiller will still provide a capacity of 120 tons. The 'N+1' redundancy

configuration should only be used in the case of 'critical' facilities.


Issue 2, 01/05/11




8


13/36

An HVAC system's capacity reserved for future growth is to be used as the primary source of the level of redundancy as

defined in this section. The actual growth in loads shall be monitored and capacity added in order to maintain the minimum

recommended redundancies. In concept, the redundancy available in the plant should be adequate to maintain the

nominal temperatures in table 2.1 during 95% of the facility's annual operating conditions as determined by a computer

model and life-cycle cost analysis.

Chiller or DX Plant

The chiller or DX plant shall be provided with multiple chillers or DX units in the 'multiple system' or 'N+1' configuration

based on the type of the Central Office building supported (i.e., Critical or Non-Critical). 'Multiple Systems' refers to the

practice of having an adequate number of components (e.g., compressors, circuits) such that, in the case of failure of one

component, the other components are able to maintain nominal temperatures within the specified temperature guidelines

during 95% of the facility's annual operating conditions as determined by a computer model and life-cycle cost analysis.

Air Handl ing Units

Redundancy shall also be provided for the air distribution system by the use of multiple Air handling Units (AHUs). Use

of multiple computer room type AHUs which are preferably housed in a mechanical room or multiple standard AHUs

located in a mechanical room. System design will vary depending upon location. In northern climate use of an economizer

can be considered.

4.4. Outdoor Design Parameters

The design of air conditioning systems (including cooling towers and evaporative condensers) shall be based on ASHRAE

recommended regional, summer, 1% design value for dry-bulb and coincidental wet-bulb temperature. The design of

heating systems shall be based on ASHRAE recommended regional, winter, 99% dry-bulb design temperature.

4.5. Indoor Design Parameters

The HVAC system shall be designed so as to maintain the indoor operating conditions shown in table 2.1below:

TABLE 2.1 - OPERATING TEMPERATURE & HUMIDITY LEVELS

AreaNormal Operating Ambient

Average Temperature Range

Normal Operating Relative

Humidity Range1

Switch/Transport 65oF - 78oF 5 - 55%

Power Room without

Batteries

50oF - 85oF 5 - 55%

Power Room with Batteries; and/

or Battery Rooms/Areas50oF - 77oF 5 - 55%


Issue 2, 01/05/11




9


14/36


15/36

The switch room shall be provided with continuous ventilation at the minimum rate permitted by code, but not less than

0.1 ft3/ min / ft2of floor area of the room. Failure of the ventilation system shall be alarmed to the Supervising Station.

4.8. Control Room

Air Conditioning

The control room shall be conditioned by an independent cooling system. Units shall not be installed within the control

room. This also will provide security since HVAC technicians will not have access to telecom spaces. In the event of a

failure, a damper in the ductwork serving the switch room shall open, allowing air to flow and shall be alarmed to the

Supervising Station. In the event of release of Dry Agent Fire suppression in the switch room or the control room, the

emergency cooling damper between the switch room and control shall automatically close.

Air distr ibut ion

Air distribution shall be by way of overhead ductwork, with ceiling mounted diffusers to provide flow to all parts of the

room. No internally lined ductwork shall be used. Noise levels from the HVAC system shall be kept to a level suitable for

office spaces (NC 35).

Ventilation

The control room shall be provided with continuous ventilation at the minimum rate permitted by code, but not less than

20 ft3/ person. Failure of the ventilation system shall be alarmed to the Supervising Station.

4.9. DC Power Rooms

Air Conditioning

DC power room including the shall be conditioned by multiple independent cooling systems, meeting the criteria of N+1,

with a design heat gain from the rectifiers based on 80 W / sq. ft) . Units shall automatically cycle to balance run times.

In the event of a failure, redundant units shall automatically start and shall be alarmed to the Supervising Station.

Air Dis tr ibut ion

DC Power room air distribution shall be by way of overhead ductwork, with regular grills or diffusers to provide flow to all

parts of the room. No internally lined ductwork shall be used. Air-flow noise levels shall be kept to a practical minimum.

Filtration requirements are 65% to 85% depending upon location and climate.

Ventilation

The DC power battery storage room shall be provided with continuous ventilation at the rate of not less than 1 ft3/ min /

ft2of floor area of the room. Failure of the ventilation system shall be alarmed to the Supervising Station.


Issue 2, 01/05/11




11


16/36

In shared spaces, where batteries are not compartmentalized from other equipment, the room design shall follow the most

stringent of the following rules;

A. One air change every four hours

B. Two cubic feet per minute per string

C. Twenty cubic feet per minute per person when occupied

D. Applicable Codes

Hydrogen detection and alarm system shall be installed in the battery room within 12' of the ceiling at a location that is

away from any supply air.

Battery room air shall not be exhausted through any other equipment or administrative space, but shall be exhausted

directly outdoors away from any building intake. There shall be two battery room exhaust fans each at 50% of the required

capacity. The fans shall also be used for smoke management / exhaust.

4.10. Offices and Administrative Areas

Air Conditioning/Heating

An independent cooling and heating system shall condition the space. The unit shall be designed for comfort cooling only,

with no redundancy provided in the event of unit failure.

The equipment shall use air-cooled direct expansion (DX) or glycol as the heat rejection medium, depending on distance

between the evaporator and heat rejection device. The condenser/dry cooler shall be located in an exterior protected

location.

Alternatively, the cooling may come from the main building cooling system as long as zone control is in place to provide

variable cooling capacity between 10 to 35 watts per square foot in the administrative areas. Air movement noise for

cooling shall not be louder as would normally be experienced in an office environment.

Zoning cooling controls shall be located in the administrative areas as to allow for convenient usage by building occupants.

4.11. Standby Engine/Fuel Storage Rooms

Air Condit ioning /Heating

Provide thermostatically electric unit heaters to maintain room temperature at minimum 55 degree F. No air conditioning

is required.

Air distr ibut ion


Issue 2, 01/05/11




12


17/36

Generator Set outdoor air intake louvers shall be sized to for maximum 400 ft/min. face velocity. Generator Set radiator

discharge shall be sized for maximum 600 ft/min face velocity. Louvers shall be double wall aluminum insulating type with

thermal break in blades and frames, based on TAMCO series 9000. To conserve heating and prevent cold draft, provide

bypass damper on top or side(s) of the radiator discharge plenum housing. The automatic bypass damper shall be

normally open to re-circulate warm air within the room. It shall be thermostatically controlled and closed as the temperature

within the generator room reaches above 75 degree F.

4.12. Smoke Management Systems

Smoke Management systems shall be installed for each critical fire zone. The system shall comply with the applicable

sections of NFPA 92A, Recommended Practice for Smoke Control Systems and NFPA 204, Guide for Smoke and Heat

Venting. Although smoke management is applicable to all areas of a building, it is most important in the telecommunica-

tions equipment space and power control and distribution areas. The systems shall consist of smoke zones consistent

with the fire suppression system zones. Each zone air system shut down and start up shall be based on the fire alarms

generated in each respective critical zone with no disruption in the adjacent (unaffected) zones. The system shall be

manually operated by the Fire Department only - no automatic system. Controls for this system shall be located adjacent

to the main fire alarm panel.

5. Fire Protection System Guidelines

5.1. Introduction

These standards provide minimum requirements for fire protection in Cingular's MSCs. These standards cover Cingularrequirements, insurance company requirements, and appropriate NFPA (National Fire Protection Association) codes,

standards, and practices.

5.2. Fire Alarm System

The main fire alarm control panel will only be of the fully addressable design. The system shall be installed in accordance

with NFPA 72, National Fire Alarm Code. The fire alarm control panel shall be the sole panel controlling all building fire

alarm system devices, pre-action system equipment and devices and all clean agent equipment and devices. This panel

will be semi-recessed in wall and shall be located in the Control Room. A graphical floor plan drawing shall be located

adjacent to the fire alarm control panel. This floor plan drawing shall indicate all building fire alarm initiating devices

including all notification devices, clean agent tanks, and related clean agent initiating devices. This drawing shall be colorcoded to indicate all building fire alarm zones including all clean agent fire suppression zones.

A remote graphic annunciator panel shall also be provided. This panel will be semi-recessed in wall and shall be located

in the building main entry vestibule. This annunciator panel shall mimic all building fire alarm control panel functions. This


Issue 2, 01/05/11




13


18/36

panel shall also indicate all building fire alarm initiating devices including all notification devices. The annunciator panel

shall be color coded to indicate all building fire alarm zones.

Wiring for all fire alarm detection and suppression systems shall be as follows:

All Signaling Line Circuits (SLC) will be Class A, Style 6.

All Notification Appliance Circuits (NAC) shall be Class A, Style Z.

All Initiating Device Circuits (IDC) shall be Class A, Style D as defined in the 2002 edition of NFPA 72, National Fire Alarm

Code.

5.3. Alarm Processing

Fire alarm, supervisory and trouble signals shall be annunciated at a constantly attended location. These alarms shall be

connected to the appropriate Network Operation Center and to a UL listed Central Alarm Station. Disposition of fire alarm,

supervisory, and trouble signals shall conform to the requirements of NFPA 72, National Fire Alarm Code.

The Fire Department shall be notified immediately when a fire alarm signal is received.

5.4. Portable Fire Extinguishers

All portable fire extinguishers shall have a minimum rating of 2A:10BC and contain DuPont FE-36 agent. Placement,

inspection, and maintenance shall be in accordance with NFPA 10, Standard for Portable Fire Extinguishers.

AT NO TIME WILL DRY CHEMICAL EXTINGUISHERS BE PERMITTED IN THE SWITCH AREA & POWER AREA. IN

NEW FACILITIES DRY CHEMICAL EXTINGUISHERS ARE TO BE OMITTED ALTOGETHER.

5.5. Incoming Fire Protection /Domestic Water Service

In locations of the country where the jurisdiction require one incoming water service for both plumbing and fire protection

a through wall indicating valve shall be provided on the fire service.

In locations of the country where the jurisdiction requires two incoming water services a post indicating valve shall be

provided on the fire service outside the building.

5.6. Means of Egress

Means of egress shall be provided in accordance with NFPA 101, Life Safety Code.


Issue 2, 01/05/11




14


19/36

5.7. Protection From Exposures

Exterior walls and openings shall be protected as required by the applicable code or shall be protected in accordance

with the provisions of NFPA 80A, Recommended Practice for Protection of Buildings.

5.8. Telecommunication Equipment Space (includes Teleco Room/

Area)

Construction

Telecommunications equipment spaces shall be separated from adjacent spaces by 1-hour fire rated walls and doors.

Penetrations shall be sealed with a listed material or assembly having a fire resistance rating equivalent to the wall. A two

hour fire rating for the walls surrounding the Power and Electrical rooms shall be incorporated into the building design.

Fire Detection

Early Warning Smoke Detection Systems shall be provided and installed NFPA 72, National Fire Alarm Code, based onair changes per hour with a maximum coverage area not to exceed 400 ft2. These detectors will be a 50/50 ratio of

ionization and photoelectric design. This equipment will interface with the EWFDS and will have a coverage area not to

exceed 200 ft2.

The Construction Fire Detection Drawings shall include a 'Smoke detector quantity requirement based on air movement'

schedule for in order to clearly define the smoke detector quantity and spacing for each technical and equipment room

or space. This schedule shall include the room name, room number, room area, room volume, airflow in CFM, air change

per hour, required smoke detector spacing and required smoke detector quantity.

Fire Protection

Pre-action (double interlock) sprinkler system shall be provided and installed in accordance with the requirements of NFPA

13, Standard for the Installation of Sprinkler Systems with a density of 0.14 gpm/ft2for the remote 2,600 ft2+ combined

500 gpm hose allowance. Heads for the sprinkler system are to be ' orifice, 1650F with spacing not to exceed 130 ft2/

head. All piping shall be installed with a pitch in accordance with the section entitled 'Drainage' in NFPA 13. Piping will

have a UL corrosion factor of 1.0.

Extinguishing Systems

Clean agent extinguishing systems (FE-227 or Ecaro-25) shall also be installed.

They should be designed, installed, and maintained in accordance with NFPA 2001, Standard on Clean Agent Fire Extin-

guishing Systems. Detection Systems used to actuate clean agent extinguishing systems shall be either cross-zoned or

an equivalent method shall be used to limit the possibilities of false discharges.

Smoke Management

Smoke management systems shall be installed. They shall comply with the applicable sections of NFPA 92A,Recom-

mended Practice for Smoke Control Systemsand NFPA 204, Guide for Smoke and Heat Venting.Although smoke management


Issue 2, 01/05/11




15


20/36


21/36

Early Warning Smoke Detection Systems shall be provided and installed NFPA 72, National Fire Alarm Code, based on

air changes per hour with a maximum coverage area not to exceed 400 ft2. These detectors will be a 50/50 ratio of

ionization and photoelectric design. Hydrogen detection shall be installed in DC Battery Power rooms only.

Fire Protection

Pre-action (double interlock) sprinkler system shall be provided and installed in accordance with the requirements of NFPA13, Standard for the Installation of Sprinkler Systems with a density of 0.18 gpm/ft2for the remote 3,250 ft2+ combined

500 gpm hose allowance. Heads for the sprinkler system are to be ' orifice, 1650F with spacing not to exceed 100 ft2/

head. All piping shall be installed with a pitch in accordance with the section entitled 'Drainage' in NFPA 13. Piping will


Extinguishing Systems

Clean agent extinguishing systems (FE-227 or Ecaro-25) shall also be installed. They should be designed, installed, and

maintained in accordance with NFPA 2001, Standard on Clean Agent Fire Extinguishing Systems. Detection Systems

used to actuate clean agent extinguishing systems shall be either cross-zoned or an equivalent method shall be used to

limit the possibilities of false discharges.

Spill Control

An approved method and appropriate materials for the control and neutralization of a spill of electrolyte shall be provided.

Curbing or dropped slabs shall be provided at all battery rooms. Curbing shall not be less than 4 inches in height. Curbed

or dropped slab area to have a capacity to contain 150% of the stored electrolyte and meet local code requirements.

Hydrogen Exhaust

Refer to Mechanical System Guidelines for DC power battery room ventilation requirements.

5.11. Standby Engine/Fuel Storage Rooms

Construction

Standby Engine Rooms shall be separated from adjacent spaces by 2-hour fire rated walls and doors. Penetrations shall

be closed with a listed material or assembly with a fire resistance rating equivalent to the wall.

Fire Detection

A minimum of two (2) detection devices shall be installed in these areas. At least one ionization smoke detector and one

combination infrared-ultraviolet type flame detector shall be provided and installed in accordance with NFPA 72, National

Fire Alarm Code.

Fire Protection

Wet pipe automatic sprinklers shall be provided in accordance with NFPA 13 (pre-action dry systems may be used where

freezing is a concern and when economical feasible), Standard for the Installation of Sprinkler Systems with a density of

0.30 gpm/ft2for the most remote 2,500 ft2, or the entire room, whichever is larger, + combined 500 gpm hose allowance.


Issue 2, 01/05/11




17


22/36

Heads for the sprinkler system are to be ', or 17/32' orifice, 286 F, with spacing not to exceed 100 ft2/head. Piping will


Fuel Control

To limit fire spread and flash back, fuel supplies shall be controlled by appropriate containment, automatic fuel cutoffs in

lines supplying the standby generator and any tanks in the compartment, and by appropriate control of effluent. Thecontainment should accommodate 150% of the stored fuel capacity. Automatic fuel shutoff valves shall be installed on

the fuel supply lines from the outside storage tank to the day tank, and from the day tank to the engine. If there is no

outside storage, then valve(s) shall be installed between the fuel storage source and the engine. The valve(s) are to be

activated by cross-zoned flame and smoke detectors for that area.

Fuel Monitor ing

A Veeder-Root fuel monitoring and leak detection system control panel shall be provided and shall be located in the MSC

Control Room in order to readily alert personnel of any alarms and or status.

Fuel Storage

Indoor fuel storage shall be limited to an aggregate capacity of 1,320 gallons.

Spill Control

An approved method and appropriate materials for the control and neutralization of a spill of fuel shall be provided. Curbing

shall be provided at all entrances to the room. Curbing shall not be less than 4 inches in height, but have a capacity to

contain 150% of the stored fuel and meet local codes as required. Spill Prevention Countermeasures and Control (SPCC)

plans shall be prepared by a registered Professional Engineer for all above ground fuel storage tanks exceeding 1,320

gallons. All fuel tank filler caps are to be equipped so as to be locked via a padlock. A Veedor Root Leak Detection System

shall be provided.

Emergency Eye Wash

An emergency eye wash shall be provided in the DC battery room proper.

Outside Standby Generator Enclosures

Refer to Cingular MSC and Core Network Permanent Generator Policy Letter

5.12. Administrative Office

Construction

Administrative Office Areas shall be separated from adjacent spaces by 1-hour fire rated walls and doors. Penetrationsshall be closed with a listed material or assembly with a fire resistance rating equivalent to the wall.

Fire Detection


Issue 2, 01/05/11




18
http://apex.web.att.com/bookview/bookview.jsp?bookname=ATT-002-290-411&section=


23/36



ionization and photoelectric design.

Fire Protection

Wet sprinkler system shall be provided and installed in accordance with the requirements of NFPA 13, standard for theInstallation of Sprinkler Systems with a density of 0.14 gpm/ft2for the remote 2000 ft2+ combined 500 gpm hose allow-

ance. Heads for the sprinkler system are to be ' orifice, 165 F with spacing not to exceed 130 ft2/head. All piping shall

be installed with a pitch in accordance with the section entitled 'Drainage' in NFPA 13. Piping will have a UL corrosion

factor of 1.0.

5.13. Storage Rooms

Construction

Storage Areas shall be separated from adjacent spaces by 1-hour fire rated walls and doors. Penetrations shall be closedwith a listed material or assembly having a fire resistance rating equivalent to the wall.

Fire Detection



ionization and photoelectric design.

Fire Protection

Wet sprinkler system shall be provided and installed in accordance with the requirements of NFPA 13, standard for the

Installation of Sprinkler Systems with a density of 0.14 gpm/ft2for the remote 2000 ft2+ combined 500 gpm hose allow-

ance. Heads for the sprinkler system are to be ' orifice, 165 F with spacing not to exceed 130 ft2/head. All piping shall

be installed with a pitch in accordance with the section entitled 'Drainage' in NFPA 13. Piping will have a UL corrosion

factor of 1.0.

Spill Control

An approved method and appropriate materials for the control and neutralization of a spill of any hazardous or flammable

liquid shall be provided. Curbing shall not be less than 4 inches in height. Curbed or dropped slab area to have a capacity

to contain 150% of the stored liquids and meet local codes as required.

5.14. Smoke Management SystemRefer to Mechanical System Guidelines for details. Smoke Managements system shall comply with the applicable sections

of NFPA 92A, Recommended Practice for Smoke Control Systems and NFPA 204, Guide for Smoke and Heat Venting.

Although smoke management is applicable to all areas of a building, it is most important in the telecommunications


Issue 2, 01/05/11




19


24/36


25/36

In the event of a total AC power failure from the Commercial AC power utility and both stand-by emergency generators,

a portable generator connection cabinet shall be installed in order to provide AC power to the building as a last resort

until either the normal commercial AC utility power has been restored of any of the N+1 stand-by generators are back on

line.

The main building switchboard system's capacity shall be sized for future growth. The actual growth in loads shall be

monitored and capacity added in order to maintain the minimum recommended redundancies. The main switchboard shallbe set on a 4' minimum high concrete housekeeping pad.

6.4. Minimum Requirements

Minimum 480/277 V 3phase with 1200 amp main service.

NOTE:Size main service based upon total bldg. load + expansion load. Dual electrical service feeds are not required.

The following i s the typical example of the AC power requirements for a 48Volt DC power plant.

2500A DC plant requires a 360A AC service @ 208VAC and 155A AC service @ 480V typical (103KW)

3500A DC plant requires a 450A AC service @ 208VAV and 195A AC service @ 480V typical(129KW)

6000A DC plant requires a 635A AC service @ 208VAC and 255A AC service @ 480V typical(182KW)


10,000A DC plant requires 1455A AC service @ 208VAC and 625A AC service @ 480V typical (447KW)

Receptacles shall be located throughout the entire building facility for 120 volt convenience power. These requirements

should be determined by the design set forth in the local, state and federal codes. These current requirements could

change by vendor and should be verified for each approved vendor that is used in the Cingular wireless network.

6.5. Emergency Power

Refer to Cingular MSC and Core Network Permanent Generator Policy Letter Policy Letter 05-0122

MSC and Core Network Permanent Generator Policy Letter

Provide an Automatic Throw Over (ATO) type Main AC Service Switchboard to transfer the entire building load where

practical for weekly generator exercise.

Provide a portable generator connection cabinet on the exterior side of the building located within a protected locationand that is readily accessible to connecting an emergency portable generator. This cabinet shall be sized equal or greater

to the main electrical service switchboard. The cabinet shall also include a terminal block for all remote alarm outputs to

the building alarm cabinet.


Issue 2, 01/05/11




21
http://networkops.sbms.sbc.com/nis/NIS%20Web%20Project%20Folders/Operations%20Support/Network%20Operations%20Practices/Policy%20Letters/2005/05-0122%20MSC%20and%20Core%20Network%20Permanent%20Generator%20Policy.doc


26/36

A generator emergency power off station (EPO) shall be provided with a protective cover in order to prevent accidental

activation. This EPO station shall completely shut down any given generator upon activation. This EPO station shall be

located directly adjacent to the building exterior door on the interior side of the building and where authorized personnel

can be within clear sight of the generators.

6.6. Surge Protection

Main AC Service Switchboard shall have a premium grade TVSS (Transient Voltage Surge Suppression) device incor-

porated on the downstream side before the first electrical distribution panel. The TVSS device shall be of a 3-phase 4-

pole modular and scalable design. The TVSS shall respond to a voltage transient of 5 nanoseconds or less as a system

and not on an individual component level. The TVSS device shall have external visual status indicators. The TVSS shall

comply with ANSI standard C62.45-1987. The TVSS device shall have form 'C' alarm contacts for all 3 phases for external

monitoring purposes.

Low voltage disconnects are not to be used in DC power plants

Adhere to Cingular Grounding Standard Policy Letter 0028

Cingular Grounding Standard Policy Letter

6.7. Interior Lightning

Interior lighting fixtures installed on the ceiling at strategic locations and wired for 277V AC for the switch, transport, Teleco,

power and battery areas to facility lighting system as provided by switch and transport equipment suppliers. Each run of

pull boxes shall be separately fused (circuit breaker) and shall be control by master light switches located at entry points

to the room on opposite ends. Pull boxes shall not intruded in the 12-foot clear floor to ceiling zone. These junction boxes

shall be connected and terminated to each switch and transport aisle lighting circuit.

All overhead lighting in technical areas (switch, power, battery, staging, storage mechanical and electrical rooms) shallbe 277 volts with 4-foot pendant mounted lighting fixtures with two 32 watt, T8 fluorescent lamps. These lighting fixtures

shall be fed from the normal lighting circuit panel board.

The pendant mounted lighting fixtures shall be installed a minimum of 12'-6' above finished floor and shall be strategically

located throughout the room or area in order to achieve optimum lighting illumination. Such lighting shall be coordinated

with all equipment and battery string line-ups, ductwork, cabletrays, major piping and conduit arteries. The use of wall

mounted fluorescent lighting fixtures shall be provided where there are major conflicts in pendant mounted applications

and overhead obstructions.

All areas of the building shall have normal lighting consisting of typically 4' fluorescent (32 watt, T-8 lamps with electronic

ballast). Electronic ballasts shall have a THD (total harmonic distortion) of no greater that 10%). Lighting shall provide

and maintain 30 foot candle level even after lamp aging. Where practical in Switch and Power rooms provide unoccupied

lighting levels with local light switches or motion detector type lighting controls to turn on when occupied and automaticallyturn off when the room is not occupied

Excessive luminance (photometric brightness) differences within the field of view cause discomfort, fatigue, and reduced

efficiency. The luminance of surfaces immediately adjacent to the visual task shall be at least one-third that of the task,


Issue 2, 01/05/11




22
http://networkops.sbms.sbc.com/nis/NIS%20Web%20Project%20Folders/Operations%20Support/Network%20Operations%20Practices/Policy%20Letters/2001/01-0028%20Grounding%20Standard%20PL%20v2.dochttp://networkops.sbms.sbc.com/nis/NIS%20Web%20Project%20Folders/Operations%20Support/Network%20Operations%20Practices/Policy%20Letters/2001/01-0028%20Grounding%20Standard%20PL%20v2.doc


27/36

and they shall not exceed the luminance of the task. For more remote surfaces (i.e., an adjacent frame, bay or cabinet),

the luminance of any significant surface normally viewed directly shall be between one-third and five times the luminance

of the task.

Control room lighting

All lighting fixtures in the control room shall be of fluorescent type with dimming ballasts and shall be controlled via adimmer switch. The dimming ballasts shall be capable of dimming the lighting fixtures up to 5% of the full rated light

output.

6.8. Exterior Lightning

Exterior lighting shall produce sufficient foot-candles as to provide il lumination for effective operation of video equipment

at night. Metal halide lighting source is preferred over high-pressure sodium. Local 'illumination pollution' regulations shall

be respected.

All building mounted exterior lighting and pole mounted lighting shall be a minimum of 277 volts with metal halide lamps.

These lighting fixtures shall be fed from the normal lighting circuit panelboard and shall be controlled via an exteriormounted photocell. This photocell is to facing the northerly direction for optimum exterior lighting control.

6.9. Emergency Interior Illumination

All emergency lighting shall be powered from the 120 volt 'House' inverter panel board. The circuit breakers in the inverter

protected panelboard for all emergency and exit sign lighting fixtures shall have lock-on devices.

Emergency lighting fixtures in cable vaults and engine rooms shall be sealed type and have protective lenses.

Emergency lighting in power rooms shall be located to illuminate the DC power plant control board(s), the AC switch gear

and the generator controls.

The emergency lighting at the control board shall be adequate for personnel to read any meters or switches required to

perform necessary restore functions. One or two additional Emergency lights are to be used in battery areas and located

so as to provide best l ight distribution throughout the room.

Emergency lighting shall be provided in the standby engine room and located to enable starting the engine during a power

failure. Additional emergency lighting shall be required near the automatic, manual transfer circuits and/or ATO (Automatic

Throw Over) switchboard control equipment to allow personnel to restore the building AC power.

All exit sign lighting fixtures shall be equipped with a 90 minute minimum nickel-cadmium battery.

Exit sign lighting fixtures shall also be located at floor level within the switch room in order to facilitate exit egress where

traditional mounted exit signs are obstructed by overhead cable trays and equipment.


Issue 2, 01/05/11




23


28/36

6.10. Transport Room

A. Telco Room Minimum Requirements

The Teleco equipment area shall be within the same area as the main switch room.

B. Rack Grounding



C. Halo Grounding Ring



6.11. Emergency Generators

Refer to Cingular MSC and Core Network Permanent Generator Policy Letter Policy Letter 05-0122

MSC and Core Network Permanent Generator Policy Letter

Cingular National Generator Contracts

Caterpillar - Contract number - YANC-GEN-041103

Kohler- Contract number - KOHL-GEN-030203

7. Lightning Protection System Guidelines

7.1. Introduction


Issue 2, 01/05/11




24
http://networkops.sbms.sbc.com/nis/NIS%20Web%20Project%20Folders/Operations%20Support/Network%20Operations%20Practices/Policy%20Letters/2001/01-0028%20Grounding%20Standard%20PL%20v2.dochttp://apex.web.att.com/bookview/bookview.jsp?bookname=ATT-002-290-411&section=http://networkops.sbms.sbc.com/nis/NIS%20Web%20Project%20Folders/Operations%20Support/Network%20Operations%20Practices/Policy%20Letters/2001/01-0028%20Grounding%20Standard%20PL%20v2.dochttp://networkops.sbms.sbc.com/nis/NIS%20Web%20Project%20Folders/Operations%20Support/Network%20Operations%20Practices/Policy%20Letters/2001/01-0028%20Grounding%20Standard%20PL%20v2.doc


29/36

This document contains general guidelines for the design and selection of lightning protection equipment and systems

for MSC buildings. The purpose of these guidelines is to provide lightning protection in order to ensure a reasonable level

of protection to the MSC from lightning strikes and surges.

7.2. Capacity Design

A proper Building Lightning Protection design must address all associated attached adjacent building structures and

proper lighting protection down conductors at strategic roof air lighting terminal points.

All exterior mounted metal masses exposed to the outside/exterior such as louvers, door frames, fences, cameras, exterior

lighting, downspouts, mechanical equipment, piping, electrical equipment, metal canopy supports, receptacles, etc., shall

be bonded to the building's exterior buried ground ring.

8. DC Power Room

8.1. Power and Battery Room Minimum Requirements

A minimum of 36' front and back access is required between rows of equipment. AC electrical power must be available

at every other bay for each row of equipment for ancillary equipment (e.g. test equipment). AC convenience power outlets

to be surfaced mounted on the walls at a minimum height of 24" from floor level. One level of overhead ladder racking for

power feeder distribution.

8.2. Plant Floor Loading

Please see the attached document for details on minimum floor loading requirements.

8.3. AC Junction Boxes for Rectif ier

Electrical pull boxes shall be strategically located on the ceiling to provide drop down conduit to feed power plant rectifiers.

These should be determined by the design set forth in the local, state and federal codes. Dual AC service disconnects

shall be provided to feed power plant PDSCs (Power Distribution Service Cabinets).

The following is the typical example of the AC power requirements for a 48Volt DC rectifier. These current requirements

could change by vendor and should be verified for each approved vendor that is used in the Cingular wireless network.


Issue 2, 01/05/11




25


30/36


3500A DC plant requires a 450A AC service @ 208VAV and 195A AC service @ 480V typical(129KW)

6000A DC plant requires a 635A AC service @ 208VAC and 255A AC service @ 480V typical(182KW)


10,000A DC plant requires 1455A AC service @ 208VAC and 625A AC service @ 480V typical (447KW)

Low voltage disconnects are not to be used in DC power plants

Please refer to all Cingular Wireless DC power and grounding policies/standards as for further guidance.

8.4. AC Inverter Specifications

The inverters should be sized as required to meet load requirements for equipment that is planned for that Inverter plus

20 percent. Refer to the attached documents for details on Inverter sizing requirements.

8.5. Rack Grounding



9. Secur ity System GuidelinesNetwork Building Security Standard

10. Alarm Management

10.1. Bui lding and Equipment Alarms

Provide Alarm Cabinet and alarm terminal strips for remote reporting of all building related alarms i.e. fire alarm system,

HVAC, fuel system, fuel leak, , commercial power and emergency engines, security, DC Power system, etc. All alarm


Issue 2, 01/05/11




26
http://networkops.sbms.sbc.com/nis/NIS%20Web%20Project%20Folders/Operations%20Support/Network%20Operations%20Practices/Policy%20Letters/2005/05-0126%20Network%20Building%20Security%20Standard%20PL%20v2.dochttp://networkops.sbms.sbc.com/nis/NIS%20Web%20Project%20Folders/Operations%20Support/Network%20Operations%20Practices/Policy%20Letters/2001/01-0028%20Grounding%20Standard%20PL%20v2.doc


31/36

circuits to be closed loop and shall have identification labels on all alarm circuit wiring at both ends. A separate alarm

shall be generated for each system and piece of equipment installed using the following guideline list:

CINGULAR PROPOSED BSI ALARMS

(All alarms shall be DRY CONTACTS and shall be wired 'NORMALLY CLOSED', open on alarm)

Alarm Alarm Alarm Alarm Alarm

Point System Name Description Source

1 Fire Alarm SystemFIRE ALARM -

ALARM

On-Site Fire

DetectedFACP

2 Fire Alarm System AGENT RELEASESuppression

Agent ReleasedFACP

3 Fire Alarm SystemSPRINKLER

ACTIVATION

Sprinkler Water

FlowingFACP

4 Fire Alarm SystemFIRE SYSTEM -

TROUBLE

Fire Alarm Panel

Trouble or Super-

visory Alert

FACP

5 Security SystemSECURITY

SYSTEM - FAIL

Security System

has FailedSecurity System

Security System

SECURITY

SYSTEM - INTRU-

SION

Security System

in alarm or detec-

ted intrusion

Security System

6 AC PowerCOMMERCIAL

POWER FAIL

Commercial

Power has been

Lost

AC Power Relay

AC PowerAC POWER

TRANSFER FAIL

Transfer Switch

Failed to Provide

Power to Load

AC Relay

AC PowerAC POWER

SUMMARY

Summary Alarm

for AC Power

Fault Condition

Switchboard

AC PowerLIGHTNING

ARRESTER

Lightning Arrest-

er / TVSS FailLightning Arrester

7 Fixed Generator

GENERATOR -

RUN

Generator is

Running Generator


Issue 2, 01/05/11




27


32/36





8 Fixed Generator 1GENERATOR -

FAIL/DISABLED

Generator Major /

Shutdown Alarm /

Disabled

Generator

Fixed Generator 1GENERATOR -

MINOR

Generator Minor /

Pre-Shutdown

Alarm

Generator

Fixed Generator 1

GENERATOR -

START SYSTEM

FAIL

Generator Start

Battery System

Failure

Battery Charger

9 Fixed Generator 2 Generator - RUN

10 Fixed Generator 2GENERATOR -

FAIL/DISABLED

Generator Major /

Shutdown Alarm /

Disabled

Generator

Fixed Generator 2GENERATOR -

MINOR

Generator Minor /

Pre-Shutdown

Alarm

Generator

Fixed Generator 2

GENERATOR -

START SYSTEM

FAIL

Generator Start

Battery System

Failure

Battery Charger

11 Fuel MAIN FUEL TANK- LOW FUEL Main Fuel Tank isLow on Fuel Fuel Panel (VeederRoot)

12 FuelMAIN FUEL TANK

- FUEL TANK FAIL

Main Fuel Tank

has Fuel Failure or

Leak

Fuel Panel (Veeder

Root)

13 Portable EnginePORTABLE

ENGINE - RUN

Portable Engine

Running

Portable Engine (PGC

TB)

14 Portable Engine

PORTABLE

ENGINE - FAIL/

ALARM

Portable Engine

Major / Shutdown

Alarm / Alarm


TB)

Portable EnginePORTABLEENGINE - START

SYS FAIL

Portable EngineStart Battery

System Fail

Portable Engine (PGCTB)


Issue 2, 01/05/11




28


33/36





Portable Engine

PORTABLE

ENGINE - LOW

FUEL

Portable Engine is

Low on Fuel

(Daytank)


TB)

15 HVAC Fail

HVACTEMP HIGH (EQ

ROOM)

High Room

Temperature(see

attached table) + 5

degrees

HVAC Control Panel /

DDC

HVAC TEMP LOW (EQROOM)

Low Room

Temperature(seeattached table)-5

degrees

HVAC Control Panel /DDC

HVACHUMIDITY HIGH

(EQ ROOM)

High Room

Humidity(see

attached)55%


DDC

HVACHUMIDITY LOW

(EQ ROOM)

Low Room

Humidity(see

attached)15%


DDC

HVACTEMP HIGH (PWR

ROOM)

High Room

Temperature(see

attached table) + 5degrees


DDC

HVACTEMP LOW (PWR

ROOM)

Low Room

Temperature(see

attached table)-5

degrees


DDC

HVACHUMIDITY HIGH

(PWR ROOM)

High Room

Humidity(see

attached)55%


DDC

HVACHUMIDITY LOW

(PWR ROOM)

Low Room

Humidity(see

attached)15%


DDC


Issue 2, 01/05/11




29


34/36





Water

WATER DETEC-

TED (IF AVAILA-

BLE)

Water has been

Detected / Water

Leak

Water Detector

16 HVAC UnitHVAC SYSTEM

FAILURE

Air Conditioning

Failure / Chilled

Water System

Fail


DDC

HVAC UnitHVAC SUMMARY

ALARM

HVAC System

Summary Alarm


DDC

17 Hydrogen BATT RM EXHFAN FAIL / HYD

SENSOR

Battery RoomExhaust Fan Fail /

Hydrogen Sensor

Exh Fan / Hyd Sensor

18 DC PowerNEG 48 BATTERY

MAJOR

Battery / Rectifier

System Major

Condition

DC Plant Controller

19 DC PowerNEG 48 BATTERY

MINOR

Battery / Rectifier

System Minor

Condition

DC Plant Controller

20 Inverter Inverter Fail AlarmInverter System

FailInverter Alarm Panel

Notes:

A.All field alarm points shall be from a normally closed dry contact, open on alarm or

signal condition.

B.All field wiring shall be #18 AWG minimum and in conduit between field alarm point

and BSI.

C. All alarm wiring shall be terminated on a barriered terminal strip in the BSI cabinet.

D. All alarm wiring and terminal strips shall be identified.

E. Provide a two-inch conduit between BSI cabinet and alarm frame with one 50 pair#22 gauge solid cable.

F. BSI alarms may be generated by several bundled alarm points.


Issue 2, 01/05/11




30


35/36

11. OSS/NOC Requirements

11.1. IT LAN/WAN Racking

1. OSS equipment shall only be -48 volts DC powered. No AC to DC inverters shall be employed for powering OSS

equipment.

2. Refer to Cingular Grounding Standard Policy Letter 01-0028


11.2. NOC (Network Observations Center)

1. NOC equipment shall only be -48 volts DC powered. No AC to DC inverters shall be employed for powering NOC

equipment.

2. Refer to Cingular Grounding Standard Policy Letter 01-0028


12. Miscellaneous

12.1. Telephony and Power Cable Trays

This section to be completed at a later date.


Issue 2, 01/05/11




31
http://networkops.sbms.sbc.com/nis/NIS%20Web%20Project%20Folders/Operations%20Support/Network%20Operations%20Practices/Policy%20Letters/2001/01-0028%20Grounding%20Standard%20PL%20v2.dochttp://networkops.sbms.sbc.com/nis/NIS%20Web%20Project%20Folders/Operations%20Support/Network%20Operations%20Practices/Policy%20Letters/2001/01-0028%20Grounding%20Standard%20PL%20v2.doc


36/36

12.2. Raised Flooring

Raised flooring shall be considered on a case by case basis. Financial justification for raised floors shall be submitted in

overall building plan as required.

13. Blank Chapter

This chapter is intentionally left blank.

Revision Log

Issue Number Date Description Published By

2 01/05/11 Please note that sd0987 is

not the owner/author of this

document. Sd0987 is only

correcting a technical error

as part of the APEx Strategy

Team. See name listed in

Author tag for content related

questions.

sd0987

Acronyms

A.1. Document Specific Acronyms

A.2. Acronyms Dictionary

Refer to ATT-000-000-020, Acronyms Dictionary.


Issue 2, 01/05/11



2011 AT&T I t ll t l P t All i ht d
http://apex.web.att.com/bookview/bookview.jsp?bookname=ATT-000-000-020&section=atdoctitle