MIL-HDBK-1191
6.9.4.4
Fuel Storage Tanks.
Underground Fuel Storage Tanks are required.
Install expansion flex loops in
fuel lines which are on the soil side of a
foundation. Anchor all fuel day
tanks, using malleable fittings and valves,
with flexible connections to the
6.9.4.5
Battery Racks.
Anchor and brace battery racks.
6.9.4.6
Miscellaneous Electrical Equipment. Anchor or restrain switchgear,
substations, automatic transfer switches, distribution panels, and motor
control centers. Give special attention to providing adequate support for bus
ducts.
6.9.4.7
Building Expansion (Seismic) Joints. Carefully design all
crossings of seismic or expansion joints by power lines. Flexibility of cable
and conduit at potential points of differential movement will be provided, as
will separate grounds for conduit runs crossing seismic joints.
6.9.5
Conveyance Systems. Design elevators and shafts to meet the
prescribed lateral force requirements. Evaluate elevator manufacturers'
recommendations for meeting these criteria. In general, it will be necessary
to install additional rail support brackets, counterweight retaining brackets,
rail safety shoes and emergency stop gear; and to brace spreader beams and
elevator control cabinets.
6.9.6
Mechanical Systems. Mechanical equipment, including distribution
piping and ductwork, shall be braced, anchored, or otherwise protected in
accord with the criteria for the designated seismic performance level of the
facility. Designers are required to coordinate the bracing of piping systems
subject to thermal expansion with the seismic restraint system, to assure both
systems function as intended.
6.9.6.1
On-Site Sanitary and Water Storage Facilities. For any facility
with a designated seismic protection level in excess of "Life Safety", the
following criteria shall apply.
a. Provide the water service with two independent connections to
the water system. In addition, provide a water storage facility as a source
of supply, sized to adequately meet fire and water demands during the post-
earthquake emergency period. Design water mains to minimize service
disruption from earthquakes and to facilitate post-earthquake repair.
Domestic water storage considerations may factor in a reasonably reduced level
of water consumption for the emergency period of operation.
b. Provide an Emergency Sanitary Sewage Holding Facility for
temporary retention of all sanitary sewage discharge from the hospital during
the post-earthquake emergency period.
6.9.6.2
Fuel Gas Shutoff Valve.
Equip the site gas supply line with a
safety shutoff valve.
6.9.7
Medical Systems and Equipment.
6.9.7.1
Autoclaves. Anchor steam sterilizers.
6.9.7.2
X-Ray Equipment. Include bracing as required for the design of X-
ray unit ceiling tracks. Anchor X-ray control consoles and automatic film
developers.
6-7
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