Quantcast Selection of Gate Type

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Design.  All chain-link gates must conform to Federal
Specifications  RR-F-191/2.  Gate accessories must conform to RR-F-191/4. The
designer may use ASTM F 900, Specifications for Industrial and Commercial
Swing Gates, to augment Federal specifications where appropriate.  The width
of the gate opening should be kept to a minimum consistent with the actual
requirements for controlled passage of pedestrians or vehicles.  A primary
concern for gate design associated with security fences is to assure the
bottom of the gate fabric extends within 2 inches (50.8 mm) of the roadbed or
firm soil when closed.  Where possible, pedestrian and vehicular gates should
be clearly separated and defined.
Selection of Gate Type.  Conduct a thorough study of the terrain
in the general vicinity of a proposed gate to determine the most suitable gate
type and design for that specific location.  Review the site survey and access
control plan during the gate selection process.  Basically, there is little
security difference between gate types.  While there are a number of factors
to consider in selecting the proper gate for a security fence, the designer
will find that terrain and operational aspects are the driving forces in gate
For overhead supported and vertical-lift gates, the designer needs
to provide additional protection for the upright posts, protruding above the
nominal fence height, that can be used as an advantage by an intruder.  Gates
for security fences are provided for two basic purposes - personnel and
vehicle access.
Personnel Gates.  Where access control is required into a
restricted area, turnstile gates are recommended for controlling pedestrian
traffic as shown in Figure 19.  Turnstile gates are also very helpful in
relieving guard requirements for controlling personnel exiting a secured area
since they can be set to revolve only in the exiting direction thereby
reducing guard supervision required.  Automated access control systems using
coded credentials such as badges with magnetic stripe, magnetic spot,
proximity, Wiegand effect wires, etc., may also be used to access turnstile
gates.  When automated access is desired, NAVFAC DM-13.02 should be consulted
for specific information concerning these access control systems.
While turnstile gates provide security personnel with more
positive access control and greater penetration resistance, swing gates are a
second alternative when turnstile personnel gates are not practical.  Swing
type personnel gates may be more economical to procure and fabricate from a
hardware aspect. However, both operational and guard personnel requirements
should be considered to determine the most economical long-term cost for the
Pedestrian gates and turnstiles will be designed so that only one
person may approach the guard at a time.


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