calculated to be in compliance with code requirements
and manufacturer's recommendations, and the exhaust
be cooled in accordance with the requirements of
system must be connected to the emergency power
EIA/TIA Standard 569. Closets which house critical
distribution system. Fans shall be spark-resistant,
communications components shall be provided with
explosion proof, with motor outdoor the air stream,
dedicated air-conditioning systems that shall be connected
ductwork to be negative pressure system of corrosion-
to the emergency power distribution system.
resistant material, with exhaust directly to outdoors in a
dedicated system. Acoustical enclosures shall be provided
cooling system must be provided to maintain room
to maintain a maximum NC level of 35. Coordinate with
mechanical conditions required by equipment
electrical design specifications to include HVAC support
specifications, and in accordance with Table 5-1 of this
equipment in UPS extended servicing agreements.
chapter.
Loading Docks. The entrances and exits at loading docks
In the event the building is equipped throughout with
and service entrances shall be maintained at negative
automatic sprinklers, hoist way venting is not required.
pressure relative to the rest of the building with a means
to reduce infiltration and outdoor debris.
systems shall meet the requirements of NFPA Standard
110: Emergency and Standby Power Systems and meet the
combustion air requirements of the equipment. Rooms
must be ventilated sufficiently to remove heat gain from
equipment operation. The supply and exhaust louvers
shall be located to prevent short circuiting. Generator
exhaust shall be carried up to roof level (GSA preference)
in a flue or exhausted by way of compliance with the
generator manufacturer's installation guidelines.
Horizontal exhaust through the building wall shall be
avoided.
UPS Battery Rooms. Battery rooms must be equipped
with emergency eyewash and shower equipment (ANSI
Standard Z358.1). Floor drains required at the emergency
shower, within the battery room acid containment
curb, shall extend with acid waste piping to an acid
neutralization tank prior to discharge to the sanitary
sewer or building drain. The battery room must be
ventilated/exhausted directly to the outdoors at a rate
The Federal Triangle Building, Washington, D.C.
133
MECHANICAL
ENGINEERING
5.7
Mechanical and Service Space Requirements
Revised March 2005 PBS-P100
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