UFC 4-010-01
8 October 2003
B-4.3
Standard 18. Emergency Air Distribution Shutoff. For all new and
existing inhabited buildings, provide an emergency shutoff switch in the HVAC control
system that can immediately shut down air distribution throughout the building except
where interior pressure and airflow control would more efficiently prevent the spread of
airborne contaminants and/or ensure the safety of egress pathways. Locate the switch
(or switches) to be easily accessible by building occupants. Providing such a capability
will allow the facility manager or building security manager to limit the distribution of
airborne contaminants that may be introduced into the building.
B-4.4
Standard 19. Utility Distribution and Installation. Utility systems can
suffer significant damage when subjected to the shock of an explosion. Some of these
utilities may be critical for safely evacuating personnel from the building or their
destruction could cause damage that is disproportionate to other building damage
resulting from an explosion. To minimize the possibility of the above hazards, apply the
following measures:
B-4.4.1
Utility Routing. For all new inhabited buildings, route critical or fragile
utilities so that they are not on exterior walls or on walls shared with mailrooms. This
requirement is recommended, but not mandatory, for existing buildings.
B-4.4.2
Redundant Utilities. Where redundant utilities are required in
accordance with other requirements or criteria, ensure that the redundant utilities are
not collocated or do not run in the same chases. This minimizes the possibility that both
sets of utilities will be adversely affected by a single event.
B-4.4.3
Emergency Backup Systems. Where emergency backup systems are
required in accordance with requirements or criteria, ensure that they are located away
from the system components for which they provide backup.
B-4.5
Standard 20. Equipment Bracing. Mount all overhead utilities and other
fixtures weighing 14 kilograms (31 pounds) or more to minimize the likelihood that they
will fall and injure building occupants. Design all equipment mountings to resist forces
of 0.5 times the equipment weight in any direction and 1.5 times the equipment weight
in the downward direction. This standard does not preclude the need to design
equipment mountings for forces required by other criteria such as seismic standards.
B-4.6
Standard 21. Under Building Access. To limit opportunities for
aggressors placing explosives underneath buildings, ensure that access to crawl
spaces, utility tunnels, and other means of under building access is controlled.
B-4.7
Standard 22. Mass Notification. All inhabited buildings must have a
timely means to notify occupants of threats and instruct them what to do in response to
those threats.
B-4.7.1
New Buildings. All new inhabited buildings must have a capability to
provide real-time information to building occupants or personnel in the immediate
vicinity of the building during emergency situations. The information relayed must be
specific enough to determine the appropriate response actions. Any system, procedure,
B-13
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