MIL-HDBK-1191
partitions. Consider the locations of plumbing and medical gas equipment.
Assure it will be possible for maintenance workers to access all controls,
electrical panels, valves, and instrumentation. Be aware of NEC clearance
and vertical dedicated space requirements for electrical equipment.
Coordinate ductwork, outside air plenums, etc. with the locations of
lighting.
8.14.4.2
Above-ceiling Plenums, and Chases. Designers must anticipate
the worst case insulation, duct reenforcement, equipment support, slope,
and fitting characteristics associated with ductwork and piping
distribution systems, and be careful to coordinate the location of these
systems with other equipment, including in particular cable trays and
lighting fixtures with their vertical access/clearance space requirements.
Assure that access space is considered for damper operators, low point
steam drip assemblies, VAV terminal units, reheat coil controls and
instrumentation, service valves, and access doors for ductwork for cleaning
or damper inspection.
8.15
Fuel Storage Requirements. Refer to Section 6 of this
document, Seismic Design, for fuel storage requirements for facilities in
seismic threat regions. Additional fuel storage guidance for boiler plants
shall be obtained from the individual service criteria
8.16
Ventilation Design.
8.16.1
Ventilation Air Changes. Minimum air change rates for each
space, for both outside air and total air, are provided at Appendix A.
Ventilation rates contained in ASHRAE Standard 62-89 (reference 8q) shall
be applied for spaces or applications not addressed by Appendix A. Based
on the number of occupants identified for each space, calculate the outside
air requirements of ASHRAE 62-89 and compare to the rates given in Appendix
A, utilizing the more stringent figure in the design. The minimum outside
air change rates in Critical Care Spaces shall be maintained at all times,
except as addressed elsewhere in this Section for Operating and Delivery
Rooms during periods of non-use. Reduced outside air ventilation in
noncritical areas may be considered during non occupied times. In
addition, a Corrected Outside Air Ratio, calculated in accordance with
ASHRAE 62-89 section 6.1.3.1, may be applied for non-critical spaces. The
outside air ratio for non-critical high-occupancy spaces, including
classrooms, waiting rooms, auditoriums, and conference rooms, may be
adjusted in accordance with the provisions of ASHRAE 62-89 Section 6.1.3.4.
when the maximum occupancy peaks for a duration of less than three hours.
8.16.2
General Exhaust Provisions. Exhaust systems shall be provided
for Central Sterile Decontamination(Ethylene Oxide), animal holding areas,
autopsy/morgue spaces, laboratory fume hoods, radioisotope hoods,
bacteriological cabinet, kitchens, laundry, toilets, isolation rooms,
equipment rooms, and other areas as noted in Appendix A or as designated on
an individual project basis. No duct system conveying potentially
hazardous exhaust (ETO, lab hoods, etc.) shall be connected with a general
or toilet exhaust system. All exhaust discharge outlets shall be located
above the building roof line and located to prevent short-circuiting to air
intakes or other building openings. Exhaust fans shall be located at the
end of the exhaust duct run (exhaust ducts to be under negative pressure).
8-18
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