Technical Requirements -
Computer Room
access from IRM offices if they are directly adjacent to the computer room. Doors
and frames shall be in accordance with NFPA requirements with a wire mesh
reinforced viewing window on the latch side of the door. Tamper resistant hinge
pins shall be used. Hollow metal doors are preferred for security, durability and fire
ratings. Panic exit hardware and automatic closures shall be provided on all door
interiors.
Minimum security for computer rooms requires at least a cipher lock on the
entrances of all doors. High security computer rooms require a numeric key pad
and associated card access device with electric strike. Refer to Standard No. 6
cited above for details. These security systems along with alarm systems, smoke
detection and the like should all be powered from the computer room UPS system.
Emergency power off (EPO) push buttons shall be installed and located in
accordance with NFPA 75.
Raised Access Floor
A raised access floor of bolted stringer design shall be installed in all new VBA
computer rooms to accommodate power, data and communications cabling, and
other utilities and shall be used as a cooling air plenum from downflow computer
room air conditioning units installed within the room. The supporting structure and
stringers shall be connected to building ground in accordance with the National
Electrical Code and the IEEE Emerald Book. Water detection and smoke
detection devices are required in the underfloor area. The raised floor shall have an
18" clearance between bottom of the raised floor and the primary or subfloor slab
(12" may be considered if building constraints warrant). The raised floor should
have minimum performance specifications of:
Uniform load:
250 lbs. / sq. ft.
Concentrated load:
1,000 lbs./sq. ft.
Ultimate load:
2,000 lbs./sq. ft.
Top surface deflection at center:
0.080"
Overturning moment:
1,000 inch-pounds
Axial load:
5,000 lbs.
Local and overall surface deformation shall not exceed 0.040" when subjected to
rolling loads of 3" diameter x 1-13/16"(10 passes of 1,000 lbs.) or 6" diameter x 1-
1/2" (10,000 passes of 800lbs.)
VBA Design Guide
Page 4-3
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