MIL-HDBK-1191
elements of wall and roof construction, as for example the effect of steel
studs in walls which may as much as halve insulating effectiveness of batt
insulation.
8.8.8.
Piping Systems.
8.5.8.1
Pipe Routing. Piping distribution systems should be routed
above corridors whenever practicable, to minimize leaks, maintenance
intrusion, and noise in occupied areas of the medical facility.
8.8.8.2
Thermal Expansion. Designers are responsible for designing all
aspects of piping systems necessary for the control of thermal expansion,
and for showing the necessary control features on design drawings. This
includes showing and dimensioning as applicable, the approximate locations
well as any other piping features which may affect expansions forces in the
piping. The intent of this requirement is to assure that this critical
aspect of piping design is accomplished by the qualified mechanical
engineer selected for the project design, and not by a construction
contractor of unknown engineering ability or qualification. In the case of
direct-burial (ie., pipe within a pipe) underground heat distribution
systems, engineering of the expansion compensation features by the system
manufacturer may be preferred or necessary. Designers shall design piping
systems such that piping expansion forces are isolated from equipment.
Design Agents shall provide that contractor's shopdrawing layout drawings
of hot piping systems are reviewed by the designer or by an equally
competent engineer representative of the government.
8.8.8.3
Steam and Condensate Piping. Steam in excess of 20 psig shall
not be distributed in above-ceiling areas of a medical facility, or in
utility corridors or chases adjacent to normally occupied spaces unless
substantial concrete, masonry, or metal protective barriers are provided.
Designers shall show the required direction and degree of line slope on
drawings, and shall provide and show the locations and details of drip
traps and other drainage features.
8.9
HVAC System Controls
8.9.1
Energy Conservation. To the extent compatible with medical
functional requirements and life-cycle cost effectiveness, energy-
conserving controls and features shall be utilized in the HVAC design.
Such strategies include but are not limited to economizer cycle, alternate
energy sources, night setback or set-up (for non-24 hour operations),
exhaust air energy recovery, compressor heat recovery, and ventilation
delay. Refer to Section 7, Energy and Water Conscious Design, of this
military handbook for more detailed treatment of energy conscious design
requirements.
8.9.2
Temperature Control. Individual room temperature controls
shall be provided for all Critical spaces, Sensitive spaces, Patient
Bedrooms, and Laboratories, to closely maintain the room conditions
provided at Appendix A. Zoned temperature control shall generally be
utilized for other spaces within the facility.
8-10
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