UFC 4-021-02NF
27 September 2006
change 1, 23 October 2006
9-4.2
Other architectural issues that need to be considered include balancing
security with convenience, entries and exits, life safety code considerations, space
planning, doors, and door locks. These are discussed in the following sections.
9-4.3
Balance of Security With Convenience. There is a natural conflict between
making a facility as convenient as possible for operation and maintaining a secure
facility. Convenience should be considered during the different phases of the design
review; however, the requirement for security should never be sacrificed for
convenience. Proper security controls will reduce the flow rate and ease of ingress and
egress in and out of a facility. These issues must be addressed in initial planning to
facilitate additional entry points or administrative requirements.
9-4.4
Entries and Exits. In general, provide separate entries and exits. Establish
the number of entry/exit points consistent with security and safety guidelines. For an
SCIF only one entrance is allowed unless approved by the Cognizant Security Authority.
9-4.4.1 Use of external door hardware is prohibited on SCIFs (with the exception of
the SCIF entrance).
9-4.4.2 Obtain a copy of the facility's code diagram and access control and develop
an emergency action plan for coordination of security at door openings.
9-4.5
Space Planning. Early in the project, architectural issues for Dispatch Center
space, wall space for security panels and floor space for ESS equipment racks needs to
be discussed. Normally, security panels will go in telecommunication rooms. The ESS
designer should coordinate with the telecommunications system designer for space
requirements in the telecommunications room.
9-4.5.1 DoD criteria requires that telecommunication rooms are separate from
electrical equipment rooms. These spaces will be climate controlled separately from
adjacent spaces.
9-4.6
Doors. Entry control is achieved through locking an opening such as a door
or gate. Using the example of card reader controlled doors, the door is controlled
through a door locking mechanism. When deciding which locking mechanism to use a
decision must be made as to whether the door is "fail-safe" or "fail-secure." While most
facilities will make all egress doors able to be opened from the "secure-side" in the
egress path during a fire emergency, there are options as to whether the controlled door
is able to be open from the "public-side."
9-4.6.1 Fail-Safe. Fail-safe doors fail open on loss of electrical power. This means
that if power is lost the door hardware is configured such that the door can be opened
by anyone from the "public-side." While affording great convenience, this configuration
is vulnerable to intrusion during a power-loss event.
9-4.6.2 Fail-Secure. Fail-secure refers to entry from the public-side. Fail-secure
doors fail shut on loss of electrical power. This means that if power is lost the door
hardware is configured such that the door cannot be opened from the public-side.
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