MIL-HDBK-1027/4A
3.2.5.3
Floors.
Design floor slabs along the travel path of any equipment
to withstand the heaviest wheel loads anticipated during the installation, in
compliance with criteria in MIL-HDBK-1002/2, Loads. Training equipment
incorporating motion systems will impose static and dynamic forces upon the
facility structure.
Isolate the mechanical equipment room floor slabs from the
remainder of the facility.
Current computer equipment trends are toward more compact, yet
denser and heavier components. Future floor loads will probably localize
into more extreme concentrated loads.
3.2.5.4
Roof Loads. Mechanical equipment is preferred at ground level;
however, where roof mounting is necessary, design screening in accordance
with local wind loads and directional patterns. Anticipate other roof
structure mounted accessories, such as catwalks, ladders, hoists and cranes.
3.2.6
Heating, Ventilating, and Air Conditioning. Comply with
MIL-HDBK-1003/3 and refer to MIL-HDBK-1008C for coordination with fire
protection systems. Consider 100 percent capacity back-up HVAC equipment to
maintain critical operations.
Coordinate exterior mechanical equipment
location with civil design. Locate noisy chillers and other equipment remote
from occupied spaces and as near as possible to the mechanical spaces. Shade
is desirable; however, equipment should not be located beneath trees, where
it can become clogged with leaves and debris. Distribution piping for
utilities, including refrigerant and condenser water, should enter the
building only through the mechanical room.
Avoid routing chilled water
piping over computer areas and trainer devices, to prevent damage to high
cost equipment from leakage and condensation. Provide isolation valves to
facilitate maintenance without system shutdown. Comply with NAVFAC DM-3.10,
Noise and Vibration Control of Mechanical Equipment, where adjacent spaces
and/or sensitive equipment cannot tolerate noise and vibration.
Ceilings may be higher than normal for classroom settings due to
lab trainer requirements. Accommodate appropriate air flow requirements at
the trainee table working level.
Lab/Classroom. High ceiling areas may require use of ceiling fans
to distribute conditioned air to seated occupants.
3.2.6.1
Design Conditions. Design conditions for comfort conditioning
should be determined in compliance with MIL-HDBK-1190. Electronic and
computer procurement documents require that equipment function properly in an
air conditioning environment between 60 degrees and 80 degrees Fahrenheit for
electronics and between 45 degrees and 120 degrees for mechanical equipment
including hydraulics.
3.2.6.2
Ventilation. Provide ventilation rates for occupied spaces as
required in ASHRAE STD 62. Provide thermostatically controlled forced
ventilation in mechanical, electrical and hydraulic spaces. Cool hydraulic
pump rooms and compressor rooms by mechanical ventilation only.
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