Consider the following when designing
Fence components may require additional protective coatings
in salt-laden and highly corrosive areas, e.g., plastic coating over
galvanized steel fabric.
Rapid growth of vegetation in fertile areas and rainy
climates may justify paving the area under the fence and a portion or all of
the clear zones.
Consideration should be given for equipment, i.e., mowers,
tractors, etc., required to maintain vegetation below 8 inches (203.2 mm) and
to broadcast defoliants or sterilants.
Erosion Control. For erosion control, refer to MIL-HDBK-1005/3,
erosion control measures advised in either MIL-HDBK-1005/3 or DM-5.14 violate
the security requirements contained herein, the security requirements take
Grounding. Generally, grounding is not required for chain-link
fences mounted on metal posts. However, fences shall be grounded on each side
of every gate, at points 150 feet (45.7 m) on each side of high-tension line
crossings, and at 150-foot (45.7-m) intervals along the fence where high-
tension lines (as defined by ANSI C2) are directly overhead and run parallel
to the fence. Fences shall be grounded every 1,000 feet to 1,500 feet
(304.8 m to 457.2 m) of length when fences are in isolated places and at
lesser distances depending upon proximity of fence to public roads, highways,
and buildings. Grounding will also be provided for fenced conventional AA&E
and nuclear weapons storage areas. The ground shall be made with a bolted
connection at a fence post by the use of No. 2/0 AWG (67.4 sq mm) copper
cable. Where plastic coated fabric is used, the post shall be bolted, and
each strand of the fence shall be brazed to the metallic bare conductor. The
conductor shall then be grounded. For additional information, see MIL-HDBK-
1004/6, Lightning Protection.
Special Requirements for Fences Equipped with Intrusion Detection
Systems (IDS) Sensors. IDS sensors are often placed on security fences and
clear zones to detect aggressors attempting to gain access to an asset.
Exterior sensors consist of four major types of field sensors: beam sensors,
fence disturbance sensors, seismic sensors, and video motion detectors. If
exterior IDS sensors are to be included in the fabrication and installation of
security fences, the criteria presented in DM-13.02, Commercial Intrusion
Detection System (IDS) should be used.
Taut-Wire Fences. Taut-wire sensored fences may be installed
around designated restricted areas, except for AA&E and nuclear restricted