UFC 4-010-01
8 October 2003
that they resist forces of 0.5 times the component weight in any direction and 1.5 times
the component weight in the downward direction. This standard does not preclude the
need to design architectural feature mountings for forces required by other criteria such
as seismic standards.
B-4
ELECTRICAL AND MECHANICAL DESIGN. Electrical and mechanical
design standards address limiting damage to critical infrastructure, protecting building
occupants of threats or hazards.
B-4.1
Standard 16. Air Intakes. Air intakes to
heating, ventilation, and air
conditioning (HVAC) systems that are designed to move air throughout a building that
are at ground level provide an opportunity for aggressors to easily place contaminants
that could be drawn into the building.
B-4.1.1
New Buildings. For all new inhabited buildings covered by this document
locate all air intakes at least 3 meters (10 feet) above the ground.
B-4.1.2
Existing Buildings. The above requirement is recommended, but not
mandatory, for existing inhabited buildings covered by these standards.
B-4.2
Standard 17. Mailroom Ventilation. To ensure airborne chemical,
areas of buildings in which the mailrooms are located, provide separate, dedicated air
ventilation systems for mailrooms. Refer to the DoD Security Engineering Design
Manual for additional guidance.
B-4.2.1
Other Heating and Cooling Systems. Building heating and cooling
systems such as steam, hot water, chilled water, and refrigerant may serve mailrooms
as long as the airflow systems for the mailrooms and other areas of the buildings in
which they are located remain separate.
B-4.2.2
Dedicated Exhaust Systems. Provide dedicated exhaust systems within
mailrooms to maintain slight negative air pressures with respect to the remainder of the
buildings in which the mailrooms are located so that the flow of air is into and contained
in the mailrooms. Though the airflow into the mailrooms will not eliminate the potential
spread of contamination by personnel leaving the mailroom, it will limit the migration of
B-4.2.3
Outside Intakes and Exhausts. Provide mailroom ventilation system
outside air intakes and exhausts with low leakage isolation dampers that can be closed
to isolate the mailrooms.
B-4.2.4
Isolation Controls. Provide separate switches or methods of control to
isolate mailrooms in the event of a suspected or actual chemical, biological, or
radiological release.
B-12