Ufc 4 022 03 Fence Gates
Ufc 4 022 03 Fence Gates
Ufc 4 022 03 Fence Gates
December 2007
DRAFT
SECURITY ENGINEERING:
FENCES GATES, AND GUARD
FACILITIES
Any copyrighted material included in this UFC is identified at its point of use.
Use of the copyrighted material apart from this UFC must have the permission of the copyright
holder.
This UFC supersedes, in part, Military Handbook 1013/10, Design Guidelines for Security
Fencing, Gates, Barriers and Guard Facilities.
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December 2007
FOREWORD
The Unified Facilities Criteria (UFC) system is prescribed by MIL-STD 3007 and provides
planning, design, construction, sustainment, restoration, and modernization criteria, and applies
to the Military Departments, the Defense Agencies, and the DoD Field Activities in accordance
with USD(AT&L) Memorandum dated 29 May 2002. UFC will be used for all DoD projects and
work for other customers where appropriate. All construction outside of the United States is also
governed by Status of Forces Agreements (SOFA), Host Nation Funded Construction
Agreements (HNFA), and in some instances, Bilateral Infrastructure Agreements (BIA.)
Therefore, the acquisition team must ensure compliance with the more stringent of the UFC, the
SOFA, the HNFA, and the BIA, as applicable.
UFC are living documents and will be periodically reviewed, updated, and made available to
users as part of the Services’ responsibility for providing technical criteria for military construction.
Headquarters, U.S. Army Corps of Engineers (HQUSACE), Naval Facilities Engineering
Command (NAVFAC), and Air Force Civil Engineer Support Agency (AFCESA) are responsible
for administration of the UFC system. Defense agencies should contact the preparing service for
document interpretation and improvements. Technical content of UFC is the responsibility of the
cognizant DoD working group. Recommended changes with supporting rationale should be sent
to the respective service proponent office by the following electronic form: Criteria Change
Request (CCR). The form is also accessible from the Internet sites listed below.
UFC are effective upon issuance and are distributed only in electronic media from the following
source:
Hard copies of UFC printed from electronic media should be checked against the current
electronic version prior to use to ensure that they are current.
AUTHORIZED BY:
______________________________________ ______________________________________
JAMES C. DALTON, P.E. STEVEN R. ISELIN, P.E.
Chief, Engineering and Construction Chief Engineer
U.S. Army Corps of Engineers Naval Facilities Engineering Command
______________________________________ ______________________________________
KATHLEEN I. FERGUSON, P.E. Dr. GET W. MOY, P.E.
The Deputy Civil Engineer Director, Installations Requirements and
DCS/Installations & Logistics Management
Department of the Air Force Office of the Deputy Under Secretary of Defense
(Installations and Environment)
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Subject: UFC 4-022-03, Security Engineering: Fences, Gates, and Guard Facilities.
Cancels: Military Handbook 1013/10, Design Guidelines for Security Fencing, Gates,
Barriers, and Guard Facilities.
Purpose: This document is to provide a unified approach for the design, selection, and
installation of security fences, gates, and guard facilities associated with Department of Defense (DoD)
facilities. The examples provided in the UFC are for illustration only and shall be modified and adapted to
satisfy installation specific constraints. This document is not intended to address procedural issues such
as threat levels or to provide specific design criteria such as impact forces.
This UFC was developed by consolidating and refining criteria from USCE Protective Design
Center, Security Engineering Work Group (SEWG); Naval Facilities Engineering Command
(NAVFACENGCOM), Engineering Innovation and Criteria Office, and available military, government, and
commercial sources that are listed in Appendix A of this document.
Application and Use: Commanders, security and antiterrorism personnel, planners, designers,
architects, and engineers should use this UFC when evaluating existing and providing new security
fencing, gates, and guard facilities. Technical information considered generally known to professional
designers, architects, engineers, or readily available in technical references (Unified Facility Criteria,
Military Handbooks, Technical Manuals, etc.) has not been included.
Need: Fencing is primarily used to define perimeters; however, Department of Defense (DoD)
and Service regulations require fencing to be provided for certain restricted areas. DoD and Service
policies will be addressed to establish fencing requirements. This UFC will focus on the requirements for
security fences, however, the information and notional design details presented within may also be used
for general or perimeter fencing. Modifications to existing security fencing are not required to meet the
new criteria if the existing fencing provides an equivalent or greater penetration resistance.
Creates a standardized approach for identifying and justifying security and antiterrorism design
criteria for DoD facilities
Creates standardized nomenclature and criteria for asset, threat, and level of protection definition.
Creates a standardized procedure for identifying costs for DoD facilities with security and
antiterrorism requirements to a planning level of detail.
Creates a standardized process for evaluating design criteria and protection options based on cost
and risk management.
Provides guidance for incorporating security and antiterrorism principles into installation master
planning.
Does not have any adverse impacts on environmental, sustainability, or constructability policies or
practices.
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CONTENTS
CHAPTER 1 INTRODUCTION........................................................................................ 1
1-1 BACKGROUND................................................................................................ 1
1-2 PURPOSE. ....................................................................................................... 1
1-3 SCOPE AND GUIDANCE................................................................................. 1
1-4 CRITERIA DOCUMENTATION. ....................................................................... 2
1-5 NATO CRITERIA.............................................................................................. 2
1-6 MANDATE. ....................................................................................................... 2
1-7 APPLICABILITY............................................................................................... 2
1-8 IMPLEMENTATION.......................................................................................... 2
1-9 SECURITY ENGINEERING UFC SERIES. ...................................................... 2
CHAPTER2 FENCING ................................................................................................... 4
2-1 FENCING OVERVIEW. .................................................................................... 4
2-1.1 Entry Control Facilities/Access Control Points............................................ 4
2-1.2 Natural Barriers............................................................................................... 5
2-1.3 Material Selection and Coatings.................................................................... 5
2-2 LEVELS OF PROTECTION.............................................................................. 5
2-3 CHAIN LINK FENCING. ................................................................................. 11
2-3.1 Chain Link Fencing Fabric. .......................................................................... 12
2-3.2 Fencing Components, Fittings and Accessories. ...................................... 13
2-3.3 Conventional Arms and Ammunition Storage Areas................................. 14
2-3.4 Nuclear Requirements. ................................................................................. 14
2-3.5 Airport Requirements. .................................................................................. 14
2-4 ORNAMENTAL FENCE. ................................................................................ 15
2-5 WELDED WIRE MESH FABRIC FENCING. .................................................. 15
2-5.1 Fence Components, Fittings and Accessories. ......................................... 15
2-6 EXPANDED METAL FENCING...................................................................... 15
2-6.1 Retrofitting Existing Fencing. ...................................................................... 16
2-6.2 Fence Components, Fittings and Accessories. ......................................... 16
2-7 FARM-STYLE FENCE.................................................................................... 16
2-8 EXPEDITIONARY PERIMETER FENCING.................................................... 16
2-9 FENCE FABRIC HEIGHT............................................................................... 17
2-10 TOP GUARDS. ............................................................................................... 17
2-10.1 Outriggers...................................................................................................... 17
2-5.1 Barbed Wire and Barbed Tape Concertina. ................................................ 18
2-11 GROUNDING.................................................................................................. 19
2-12 REINFORCEMENT FOR FENCING. .............................................................. 19
2-12.1 Deadman Anchor. ......................................................................................... 20
2-13 CLEAR ZONES. ............................................................................................. 21
2-14 ELECTRONIC SECURITY SYSTEMS. .......................................................... 22
2-14.1 General Conduit Locations. ......................................................................... 23
2-14.2 Taut-Wire. ...................................................................................................... 23
2-15 SPECIAL SECURITY FEATURES. ................................................................ 24
2-15.1 Double Fence Lines. ..................................................................................... 24
2-15.2 Patrol Roads.................................................................................................. 24
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FIGURES
TABLES
Table 2-1: Chain Link Fencing Types, Materials and Uses ............................................. 6
Table 2-2: Protection Levels and Criteria ........................................................................ 6
Table 2-3: Restricted Area Levels, Descriptions and Examples...................................... 7
Table 3-1: Gate Post Foundations ................................................................................ 34
Table 4-1: Thickness of Common Materials for Resistance Against UL 752 Level III .. 44
Table 4-2: Thickness of Common Materials for Resistance Against UL 752 Level V ... 44
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CHAPTER 1 INTRODUCTION
1-1 BACKGROUND.
Security fences, gates, and guard facilities are installed and used primarily to define the
perimeter of a restricted area, and to provide a physical and psychological deterrent to
entry while serving notice that entry is not freely permitted. These facilities, in
conjunction with personnel and procedures, are instrumental in preventing accidental
entry, optimizing security force operations, and enhancing detection and apprehension,
while directing and controlling the flow of personnel and vehicles through designated
portals.
1-2 PURPOSE.
This document is to provide a unified approach for the design, selection, and installation
of security fences, gates, and guard facilities associated with Department of Defense
(DoD) facilities. The examples provided in the UFC are for illustration only and shall be
modified and adapted to satisfy installation specific constraints. This document is not
intended to address procedural issues such as threat levels or to provide specific design
criteria such as impact forces.
This UFC was developed by consolidating and refining criteria from United States Army
Corps of Engineers (USACE) Protective Design Center, Naval Facilities Engineering
Command (NAVFACENGCOM), Engineering Criteria and Programs and Antiterrorism
and Force Protection offices, and available military, government, and commercial
sources that are listed in Appendix A of this document.
These criteria are strongly suggested and should not be overlooked without prior
approval from the component office of responsibility:
y • U.S. Air Force: Air Force Civil Engineer Support Agency, Technical
Support Directorate (HQAFCESA/CES)
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Where criteria documentation such as Unified Facility Criteria and military instructions,
handbooks, technical manuals, etc., is cited, the latest version shall be used.
The criteria authorized or directed by the North Atlantic Treaty Organization (NATO)
may be different from the criteria provided in this document. NATO criteria must be
obtained to assure that specified NATO security requirements are met when designing
security components for facilities in Europe.
1-6 MANDATE.
Criteria in this Unified Facilities Criteria (UFC) are mandated for use by the Office of the
Secretary of Defense (OSD); the Military Departments (including National Guard and
Reserve Components); the Chairman, Joint Chiefs of Staff and Joint Staff; the
Combatant Commands; the Office of the Inspector General of the Department of
Defense; the Defense Agencies; DoD Field Activities; and all other organizational
entities within DoD, hereafter referred to collectively as “DoD Components.”
1-7 APPLICABILITY.
Criteria in this UFC apply to facilities that require perimeter boundaries and/or restricted
area enclosures based on current Service policies, location of facility, and threat level.
Security specialists shall provide all risk and threat assessments.
1-8 IMPLEMENTATION.
Implementation of an effective security measure in the form of fencing, gates, and guard
facilities requires coordinated efforts of engineering, security personnel, and the
commanding officer of the facility. Coordination is necessary to produce a design that is
practical, cost effective, and meets the requirements for security based on the threat
level, local conditions, and applicable directives.
This UFC is one of a series of security engineering Unified Facilities Criteria that covers
minimum standards, planning, preliminary design, and detailed design for security and
antiterrorism. The manuals in this series are designed to be used sequentially by a
diverse audience to facilitate development of projects throughout the design cycle. The
manuals in this series include the following:
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CHAPTER2 FENCING
The following documents provide Service policies and additional criteria for security
fencing:
Standard fencing drawings applicable to the following criteria are provided in Appendix
B.
Fencing incorporated with entry control facilities (ECF)/access control points (ACP)
should meet the minimum requirements established for the perimeter fencing.
Natural barriers may be used in place of perimeter or security fencing if they provide
equal or greater protection. Barriers, which may be able to provide this protection,
include, but are not limited to beaches, waterways, densely wooded areas, cliffs, and
mountains. Only the Commanding Officer should make this determination as all sites
differ.
Local environments should be considered during the selection of material for the fencing
components as well as coatings to provide additional protection against corrosion.
Color polymer and other coatings on fencing fabric, fittings, framework, and gates may
be applied to enhance visibility and provide greater corrosion resistance, especially in
salt-water environments.
Air Force: Minimum requirements for fencing types and protection levels are listed in
Table 2-1 and Table 2-2.
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Type of
Fence Materials and Installation Details Typical Uses
Fencing
Type A Chain link, 2 inch (50 mm) square mesh, • Nuclear weapon storage areas
woven 9 gage (without plastic/PVC coating)
• Aircraft parking areas
(3.76 mm or 0.148 inch) steel wire fabric, 7
feet (2.1m) high, surmounted by 3 strands of • Areas with high mission or monetary
barbed wire, angled outward at 45 degrees value
for a total height of 8 feet (2.4 m) • Barrier between flight line activities and
cantonment and base or immediately
contiguous housing areas
Type A1 Chain link, 7 feet (2.1m) high, surmounted by • Nuclear weapons storage areas
6 strands of barbed wire, 3 on each side of a
• Alert aircraft areas
"Y"-shaped outrigger, for a total height of 8
feet (2.4 m)
Type A2 Chain link, 6 feet (1.8 m) high, surmounted • Areas with high mission or monetary
by 3 strands of barbed wire, angled outward value
for a total height of 7 feet (2.1 m)
• Barriers between flight line activities
and the base cantonment or housing
areas
Type B Barbed wire, 3 or 4 strand, 4 feet (1.2 m) • Extension of flight line area barriers
high.
• Perimeter boundary for isolated
portions of installations
• Livestock barrier (4 strands of barbed
wire)
• Area boundary for on-base bulk
material storage areas
Air Force: All restricted areas should use Type A fencing as a minimum. Installations
with Protection Level 1 and 2 (PL1 and PL2) resources require Type A2 fencing as a
minimum. Boundary barriers for all restricted areas should be located at least 250 feet
from the base perimeter or property line. Areas under PL1 and PL2 should be
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compelled to install fences around the smallest area needed to contain the resources
and meet operational requirements. Entry control should be placed through a single
entry point. Areas under PL3 should be urged to place fencing where it best facilitates
movement of personnel and equipment while enhancing force protection. Circulation
control should be enforced through on-duty user personnel and security forces making
periodic checks during normal operations. If a PL3 area is located on a flight line that is
located away from the base perimeter and is using Type A fencing at the base
perimeter, then it is not necessary to install Type A fencing around the restricted area.
If a PL3 area is located on a flight line that is located away from the base perimeter and
is not using Type A fencing at the base perimeter, then Type A fencing should be
installed between the base perimeter and the restricted area at the most advantageous
location around the perimeter of the flight line so it is between the base perimeter and
the PL3 area. The boundaries of these restricted areas should also be delineated with
elevated barriers or painted lines. PL3 areas located at remote or off-installation sites
should consider installing Type A fence around areas to delineate the boundary where
circulation controls are applied. Air Force units are directed to refer to AFH 32-1084
and AFI 31-101 for additional guidance concerning Table 2-1 Table 2-2: Protection
Levels and Criteria.
Navy and Marine Corps: For security applications, fencing requirements, in addition to
current policies, should be evaluated on the security levels and corresponding restricted
areas provided in Table 2-3.
Restricted
Area Level Description Specific Restricted Areas
Level
The least secure type of restricted area, it • Motor pools
contains a security interest that if lost, stolen,
• Fuel issue points
compromised, or sabotaged would cause
damage to the command mission or national • Funds and negotiable instrument
security. It may also serve as a buffer zone storage areas
Level One for Level Three and Level Two restricted • Provost Marshal Office Desk
areas, thus providing administrative control, Sergeant/Dispatcher Area
safety, and protection against sabotage, • ESS Monitoring Spaces
disruption, or potentially threatening acts. • Military Working Dog Facilities
Uncontrolled movement may or may not
permit access to a security interest or asset.
The second most secure type of restricted • Aircraft hangars, ramps, parking
area, it may be inside a Level One area, but is aprons, flight lines, and runways
never inside a Level Three area. It contains a
• Aircraft rework areas
security interest that if lost, stolen,
compromised, or sabotaged would cause • RDT&E Centers
Level Two serious damage to the command mission or • AA&E storage facilities and
national security. Uncontrolled or unescorted processing areas
movement could permit access to the security • Fuel depots and bulk storage tanks
interest. • Communication, computer, and
antenna sites
• Power stations, transformers, master
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The most secure type of restricted area, it may • Research, testing, storage and
be within less secure types of restricted areas. maintenance facilities for the following
It contains a security interest that if lost, areas:
stolen, compromised or sabotaged would
• Nuclear
Level cause grave damage to the command mission
Three or national security. Access to the Level • Biological
Three restricted area constitutes, or is • Chemical
considered to constitute, actual access to the • Special weapons
security interest or asset.
USMC Marine Corps units are directed to refer to MCO P5530.14 for additional
requirements and guidance concerning Table 2-3: Restricted Area Levels,
Descriptions, and Examples.
Navy The Level One areas should have the following minimum required security
measures:
y Level Two and Three areas should have the following minimum required
security measures:
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USMC The Level One areas should have the following minimum required security
measures:
The Level Two areas should have the following minimum required safety measures:
• Admission only to personnel whose duties require access and who have
been authorized in writing by the Commanding Officer. Controlled
admission of individuals who require access for reasons of official
business, who render a service, and other visitors as authorized by the
Commanding Officer. Such persons and all other visitors will be escorted
by an authorized/cleared activity escort at all times, and the security
interest will be protected from compromise.
The Level Three areas should have the following minimum required safety measures:
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• A clearly defined and protected perimeter. The perimeter will be a fence or the
exterior walls of a building or structure. If the defined and protected perimeter is
the outside walls of a space within a building or structure, it must be inside a
Level One or Two restricted area.
• Admission only to personnel whose duties require access and who have been
authorized in writing by the Commanding Officer. Controlled admission of
individuals who require access for reasons of official business, who render a
service, and other visitors as authorized by the Commanding Officer. Such
persons and all other visitors will be escorted by an authorized/cleared activity
escort at all times, and the security interest will be protected from compromise.
• When secured, checked twice per 12-hour shift if adequately equipped with an
operational ESS, or twice per 8-hour shift for those facilities without an
operational IDS. Security force personnel will check for signs of attempted or
successful unauthorized entry, and for other activities that could degrade the
security of the restricted area.
Navy and USMC: The perimeter may be a fence, exterior walls of a building or
structure, or outside walls of a space within a building or structure. Inner and outer
security clear zones are to be provided according to service requirements. The
personal identification and control system may be electronic with the capability of
recording the ingress and egress. If a computer access control or logging system is
used, it must be safeguarded against tampering. Ingress and egress entrance areas
must be controlled by an electronic security system or security personnel at all secured
times. All visitors should be logged in and out in an entry/departure log. The frequency
at which visitors are logged in and out rests with the installation commander. Visitors
for all three levels must be escorted and the security interest must be protected from
compromise. For Levels Two and Three, the escort must be authorized and cleared for
the visitor’s activity.
Fencing should be kept at a minimum distance of 14 feet (4.3 m) from all tree limbs and
adjacent site elements to prevent an aid to climbing. Any fencing using an Intrusion
Detection System (IDS) should be designed to have minimal possibilities of vibrations
by maintaining fabric tension. Additional fortification measures of perimeter security are
requested to be implemented when soil conditions permit ease of tunneling under the
fence line. Soft or shifting soil, such as sand, when located along a fence line is
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compelled to have a soils engineering analysis conducted on it, and be able to provide
at least 15 seconds of tunneling resistance.
Area with water boundaries should be protected by barriers with proper signs, as
indicated in the Signage section. High threat areas, activities, or installations may
consider using patrol craft for additional protection. When weather does not permit
patrol craft, an increase in all other security measures (waterfront patrols, watch towers,
military working dog teams, and other security systems) may be considered as an
alternative.
Dual fencing may be used for added protection and to increase security breach time.
They may be considered at the more critical portions of the fence if resources allow.
This may also be considered as an effective means for use with an electronic detection
system. By detecting the intruder on the first fence, enforcement could be aware before
the second fence is breached. Dual fencing can be created by two parallel fences
separated by a space large enough to detect an intruder. The separation can also
provide access for vehicles and/or military working dogs for security patrols. The space
between fences should remain free of obstructions to prevent concealment by an
intruder. This space should be maintained and monitored in the same manner as clear
zones.
See Figure 2-1 for a standard chain link fence section identifying all of the components.
The components include (1) fabric, (2) selvage, (3) corner post, (4) barbed wire, (5)
outrigger (barb wire arm), (6) tension wire, (7) hog ring, (9) truss rod, (10) line post, (11)
tie wire, (12) tension bar, (13) tension clip, and (14) concrete footing.
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Fencing fabric wire gage and mesh openings are dependent on the type of fence,
protection needed, and location of the fence. Fence fabric material should be
galvanized steel, PVC coated steel fabric (use PVC coated if located in corrosive
environment or where aesthetics are of prime importance), or aluminum coated steel
fabric (use aluminum coated if located in corrosive environment). Painting of fence
fabric or any fencing components is prohibited; however, in the case of fabric and
components that are PVC coated, they should be manufacturers’ standard color.
Fencing fabric should be mounted on steel posts that are set in concrete with additional
bracing at corners and gate openings, as necessary. If steel posts are not available,
reinforced concrete posts may be used. Posts, bracing, and all other structural
members are directed to be placed on the secure-side of the fencing fabric. Provide
twisted and barbed selvages at the top and bottom of the fence fabric. Fencing fabric
can be securely fastened to tension wires on the top and bottom with 9 gage (3.76 mm)
galvanized tie wires incorporating at least three full twists, 9 gage round wire galvanized
hog rings, or in a manner that provides a tensile strength equal to or greater than the
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strength of the fencing fabric. Coating on any fasteners or ties must be electrolytically
compatible with fencing fabric to inhibit corrosion. The fencing fabric should be
extended to within 1 inches (51 mm) of firm ground and anchored, if required by service
requirements, using horizontal bottom rails, tension wires, concrete curbs, sills, sheet
piling, piping or other inexpensive materials. Burying the fabric 12 inches (305 mm)
may also be considered; however, corrosion of the buried fabric should be monitored.
This anchoring should prevent the fencing fabric from being able to be lifted more than 5
inches (125 mm) in height. Chain-link fabric tautness requirements can be found in
UFGS (32 31 00.00 10 / 32 31 13.00 20 / 32 31 13.00 40). Mesh openings in chain link
fencing are intended to not be covered, blocked, or laced with material which would
prevent a clear view of personnel, vehicles, or material in outer clear zones unless an
approved waiver or exception is obtained. For facilities located in Europe, the fencing
may be a NATO standard design of 2.5 – 3 mm diameter wire with a 3 inch (76 mm)
grid opening. ASTM standards A 116, A 392, A 491, A 817, F 668, A 90, A 428, and F
567 should be followed for all materials, installations, and repairs of standard fencing
fabric. Fences to be sensor equipped should be constructed to service and sensor
manufacturer standards for the system used. Fence requirements for application of
fence sensors are covered in UFGS (32 31 00.00 10 / 32 31 13.00 20 / 32 31 13.00 40).
Army Fence fabric should be twisted and barbed on the top selvage and
knuckled on the bottom selvage.
Air Force Use non-reflective coating for fences to reduce glare that could affect
remote camera and visual assessment.
Navy and USMC Security fences will be fabricated with 9-gage (3.76 mm) steel wire
mesh material with mesh openings not larger than 2 inches per side.
Provide chain link fencing components and accessories in accordance with ASTM
standards F1043, F626, A817, A824, F1083 and F1664. Locate all posts, rails, bracing
and tension wires on the secure-side, i.e. inner side, of the fencing fabric. Posts should
be vertical within plus or minus 2 degrees in each direction. Determine the embedment
depth of the fence posts and associated footings considering wind load, local soil
conditions, and the potential for wind and water erosion. Posts for security fencing must
be embedded and encased in concrete according to the notional design details in
Appendix B while general fencing shall be in accordance with ASTM F 567.
Steel truss rods used for bracing must have a minimum nominal diameter of 5/16 inch
(8 mm) and provided with turnbuckles for tensioning. Provide bracing for each gate,
terminal and end post. Install truss rods diagonally from near ground level of the gate,
terminal or end post to within 6 inches (152 mm) from the top of the fabric at the
adjacent line post.
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All fence fittings must be electrolytically compatible with all fence components.
Consider securing all fastening and hinge hardware by peening or welding to prevent
disassembly of fencing and gate components where warranted by the required level of
protection.
See Appendix B for notional design details of chain link fencing posts, rails, braces, and
tension wires.
Fencing fabric should be constructed of a minimum of 9-gage (3.76 mm) wire with mesh
openings not larger than 2 inches (51 mm) per side. Provide twisted and barbed
selvages at the top and bottom of the fence fabric. Material should be galvanized steel,
PVC coated steel fabric (use PVC coated if located in corrosive environment or where
aesthetics are of prime importance), or aluminum coated steel fabric (use aluminum
coated if located in corrosive environment). Paving beneath fencing will aid in weed
control.
Army Fence fabric should be twisted and barbed on the top selvage and
knuckled on the bottom selvage. Refer to AR190-11 for physical security criteria for
conventional arms, ammunition, and explosives (AA&E).
Air Force Use non-reflective coating for fences to reduce glare that could affect
remote camera and visual assessment. Refer to DoD 5100.76-M for physical security
criteria for conventional arms, ammunition, and explosives (AA&E).
Navy The use of reinforced concrete posts will not be allowed. Refer to OPNAVINST
5530.13 for physical security criteria for conventional arms, ammunition, and explosives
(AA&E).
USMC Refer to OPNAVINST 5530.13 for physical security criteria for conventional arms,
ammunition, and explosives (AA&E).
For nuclear storage facilities, fencing fabric should be encased in a 6 inch (152 mm)
wide concrete curb extending approximately 12 inches (305 mm) into the soil around
the entire perimeter. In areas where freezing is experienced, the curb should extend
below the local frost level depth.
For Air National Guard (ANG) and Air Force Reserve Command (AFRC) units that are
co-located with civilian airports, the airfield side of the restricted areas does not require
fencing installation as it is prohibited by the Federal Aviation Agency (FAA) safety
requirements. Fencing requirements for airports and heliports are provided in UFC 4-
141-10N and UFC 3-260-01.
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Welded wire mesh fabric fencing in comparison to chain link fencing has a greater
deterrence to intrusion by climbing and cutting. Welded wire mesh fabric fence
openings are relatively small to prevent toe or finger hold. Although the mesh sizes are
small, visibility through the fence may be higher than chain link fencing even at sight
angles near parallel to the fence line.
Fence fabric is fabricated from low carbon steel wire, ASTM A 853, Grade AISI 1008
and 1010, with a minimum tensile strength of 73,000 psi (485 MPa), minimum gage size
of 10 (2.59 mm), and maximum mesh size of 2” x 2” (51 mm x 51 mm).
Welded wire mesh fabric fencing construction costs in non-urban environments may be
approximately one half of ornamental security grade fencing.
See Appendix B for notional design details of welded wire mesh fabric fencing.
Provide welded wire mesh posts in accordance with ASTM F 1083, F1043, or A 500.
Posts and rails should be designed to resist specified loading and be spaced per
manufacturer’s guidance. Connect fencing fabric with a minimum of 9 gage (3.76 mm)
tie wires or other connection per manufacturer providing equal or greater capacity and
resistance to tampering. If using welded wire mesh fence panels, attach to line and
terminal posts and gate frames with post brackets.
Similar to welded wire mesh fabric fencing, expanded metal fencing is ideal for medium
and high security applications. The diamond shaped mesh’s small openings and wide
strands deter climbing, cutting, and tunneling. Panels are constructed of steel sheets,
simultaneously slit and stretched into a rigid, open mesh design making continuous
sheets that prohibit unraveling at the strands.
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Expanded metal fencing fabric is constructed of carbon steel or stainless steel and
should be in accordance with ASTM A 1011 and ASTM F 1267. The minimum gage
size should be 13 (1.83 mm) and the maximum mesh size should be 1 ½ inches (38
mm). Fabric coatings available are hot dip galvanized, vinyl, and powder coated. At the
time of this publication, an ASTM standard entitled “Specification for Fences Using
Expanded Metal for Security Applications” is under development. It is recommended
that this specification be used for this type of fencing when it becomes available.
Available fence patterns can provide the architectural aesthetics of ornamental fencing.
In lieu of installing a fence topping, an expended metal fabric cap sheet can be installed
at a 45-degree angle extending outside of the secured perimeter and terminating with a
turned up vertical section. If additional protection measures are required, barbed tape
can be applied to the back of the vertical portion of the cap sheet.
Expanded metal fencing can be applied as a retrofit to existing chain link fencing and
gates to provide additional protection, strength, and durability. Expanded metal fencing
should be installed directly to the existing fence utilizing the installed chain link fence
fabric and framework.
Line and terminal posts should be hot-dip galvanized SS40 and in accordance with
ASTM F 1043 and ASTM F 1083. The manufacturer’s recommendation should be
considered when spacing line posts. Top, middle, and bottom rails should be hot-dip
galvanized. Rails can be fastened to posts using clamps. Standard weight piping
should be used for the posts and rails of expanded metal fencing. Fittings such as line
rail clamps, post caps, tension bands, and panel clamps should be galvanized, heavy
pressed steel or malleable iron.
Army and Air Force Farm style fences, barb wire, and woven wire should
comply with specification requirements in UFGS (32 31 00.00 10 / 32 31 13.00 20 / 32
31 13.00 40) and the standard construction drawings indicated in Appendix B- Gate and
Fence Notional Drawings. They may be used at facilities with low or negligible threat
with approval from the installation’s Commanding Officer. Farm style fences are
constructed of wood and/or metal posts and wire. All wood posts should be pressure
treated and metal post shall be zinc coated and conform to ASTM A 702. Steel post
conforming to ASTM F 1043 may be used in conjunction with T-section or U-section line
post. The gates are constructed of 1 5/8” (41.3 mm) minimum diameter tubular steel,
and secured with a chain and padlock.
All security and perimeter fencing should have a minimum fence fabric height of 6 feet
(1.8m), excluding the top guard.
Air Force All security fencing should have a minimum fence fabric height of 7 feet
(2.14 m), excluding the top guard.
Navy All security fencing should have a minimum fence fabric height of 7 feet (2.14 m),
excluding the top guard.
USMC All security fencing should have a total height of 8 feet (2.44 m). This includes a
fabric height of seven feet, plus a top guard. An additional four to five feet of fencing
height will be added at building connections to a point at least 10 feet (3.05 m) away
from the building. Fences or walls at free-standing facilities with high threat levels
should be a minimum of 9 feet (2.74 m) tall and extend at least 3 feet (915 mm) below
grade.
The bottom of perimeter fence fabric should not be capable of being lifted more than 5
inches (125 mm). One method of providing additional resistance is to bury the fabric 12
inches (305 mm) to anchor it. Fencing design may consider increasing the fence height
above the minimum required at all building connection points for additional security.
Perimeter fencing surrounding nuclear weapon storage facilities should be a minimum
of 7 feet (2.14 m) high fabric plus outriggers. Modifications to existing fences are not
required to meet the new criteria if the existing fencing provides an equivalent or greater
penetration resistance.
Top guards should be constructed of the same material as the other fencing
components.
2-10.1 Outriggers.
Fencing requiring barbed wire should use a minimum of 3 strands of barbed wire
equally spaced 16 inches (406 mm). Additional strands may be added as required.
Barbed wire shall consist of two 12-1/2-gage 0.099-inch (+0. 005- inch) twisted line
wires with 1~-gage 0.080- inch (+0, 005-inch) round barbs. Barbed wire shall be zinc-
coated steel, aluminum coated steel, aluminum alloy, or PVC over zinc-coated steel as
specified. All barbs shall consist of four points and spacing of barbs shall be at 5- inch
(+1- inch) centers.
Conventional arms and ammunition security fencing should use twisted, double strand,
12.5 gage (2.51 mm) wire with four-point barbs spaced an equal distance apart. Any
barbs used with farm fencing ought to be a minimum of 15.5 gage wire. Barbed clusters
should have a minimum width of 1.21 inches (30.7 mm). The distance between these
strands is intended not to exceed 6 inches (152 mm) and at least one wire should be
interlaced vertically and midway between posts. The ends of the barbed wire strands
may be staggered or fastened together, and the base wire may be picketed to the
ground.
3 or 4-strand barbed wire fencing, 4 feet (1.2 m) high, should be used for extensions of
flight-line area barriers, perimeter boundary for isolated portions of installations,
livestock barrier, and area boundary for on-base bulk material storage areas. Barbed
wire fastened on wooden posts may use a minimum of 1.5 inch (38 mm) staples made
from the same metal as the wire for fastening.
When used for temporary purposes, concertina wire should be used in multiple stacked
coils. Stacked concertina wire on perimeter barriers may be laid between poles with
one roll on top of another or in a pyramid arrangement (minimum of 3 rolls). Concertina
blades should have a minimum length of 1.2 inches (30.5 mm). Barbed tape concertina
may be added to the top and, in some cases, to the bottom to increase the level of
protection. Barbed tape concertina should be secured at a minimum interval of 18
inches (457 mm) along the fence fabric to the top barbed wire strand and a maximum
gap of 2 inches (51 mm) should be maintained between the bottom barbed wire and the
top of the chain-link fabric. After use, barbed tape concertina may be recoiled and
reused without distortion. For additional protection, barbed tape concertina may be
installed between the “Y” of the outriggers.
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Barbed tape concertina should be in accordance to ASTM F 1911 and F 1910. Except
where specifically required by service criteria, the use of barbed wire and barbed tape
concertina should be approved by the Commanding Officer.
2-11 GROUNDING.
Grounding and bonding of the perimeter systems should be in accordance with the
National Electric Safety Code (NESC).
Metal fences that are electrically continuous with metal posts extending at least 24
inches (610 mm) into the ground require no additional grounding. Metal posts in
concrete footings will require grounding regardless of depth of footing. Other metal
fences should be made electrically continuous and grounded on each side of every gate
at gateposts, at corner posts, and at end posts. The gate should be bonded to the
adjacent fence post utilizing flexible copper grounding braid with sufficient slack to
permit 180 degree (3.14 rad) opening of gate. Provide ground rods or ground plates
every 1000 feet to 1500 feet (305 m to 457 m) when fences are located in isolated
areas; and every 500 feet to 750 feet (152 m to 228 m) when located within 100 feet (30
m) of public roads, highways, and buildings. Ground all metal fences at or near points
crossed by overhead power lines in excess of 600 volts and also at distances of 150
feet (46 m) on each side of the line crossing. The ground should be made with a bolted
connection at a fence post by the use of No. 2/0 AWG copper cable. Where plastic
coated fabric is used, remove plastic coat and braze or bolt conductor to post. Fences
around electric supply stations and communication facilities may be required to have a
bonding cable run underground between gate posts, see National Electric Safety Code
(NESC) for these requirements.
Refer to UFC 4-022-02 for additional guidance and requirements (number and size of
cables) on fence reinforcement for identified moving vehicle threat. Reinforcement for
fencing is typically done by installing a minimum 6X19 class wire rope across the
fencing material on the secure-side. See Figure 2-2 for a notional layout of cable
reinforcing. The wire rope should be regular lay, extra improved plow steel (EIPS),
independent wire rope core (IWRC), class A galvanized and in accordance with ASTM
A 603. Cables may be installed either between the fence fabric and post or on the
outside of the fabric. Installing the cables between the fence fabric and post may be
more costly due to the labor of removing and replacing the fabric or “sewing” the cable
through the fabric. Cables should be overlapped, where possible, before terminating at
the deadman to ensure that there are no voids of reinforcement along the perimeter.
Where overlapping is not possible, other means (such as using bollards) can be used to
continue the protective barrier. Due to limitations in the penetration resistance provided
by single strand cable systems, a minimum of two cables should be provided. The
cables should be fastened with wire rope clamps, Type 1, Class 1, galvanized and in
accordance with Federal Specification, FS FF-C-450, at a height of approximately 30
inches (762 mm) from the ground. The second, or any other additional cables, should
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be placed 5 inches (125 mm) above or below the first cable and attached to the fencing
and anchored to the same deadman in the same manner as the first cable. Each cable
end may be terminated with four wire rope clamps or a wire rope hydraulically swaged
press fitting conforming to Military Specification, MS20668. The cable end should be
attached to one end of a 1 ¼ inch (6.35 mm) X 12 inch (305 mm), Type 1, Grade 1, zinc
coated round turnbuckle with one jaw end and in accordance with ASTM F1145. Eye
ends should be attached to the deadman eyebolt by a ¾ inch (19 mm) anchor shackle,
National Aerospace Standard, NASM 45908. If located in a corrosive environment,
coated or sheathed cable may be used; however, the sheathing shall be removed at the
connections.
Eyebolts embedded in the concrete deadman anchors may have either a welded “T” or
“L” end. The eyebolt can either be in-line with the attached cable or flush against the
deadman surface. When used, eyebolts should be welded and galvanized to the
anchor rods. The top side of the deadman can either be placed flush with or below the
ground surface with the eye of the eyebolt above ground. Threaded rods may also be
used as an alternative to the eye bolt when securing the cables to the deadman anchor.
When using threaded rods, the threaded rod and wire rope connection should be visible
above ground like the eyebolt previously described.
Figure 2-3 shows the deadman positioned using a cable clamp and turnbuckle to secure
the cable rather than a swaged on clamp. This turnbuckle adds the advantage of being
able to adjust the tension of the wire rope.
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The anchoring system: deadman dimensions or other anchoring systems and burial
depth, eyebolt embedment depth, etc. should be designed for local soil conditions and
the anticipated impact force established by the threat parameters defined in UFC 4-020-
02.
T OR L PLATE WELDED
THEN GALVANIZED
Vegetation within any clear zone should not exceed 6 inches (152 mm) in height. If
clear zone requirements are not feasible, consideration may be given to increasing
perimeter barrier height, increasing security-patrol coverage, additional security lighting,
or installing an intrusion detection system.
Army Conventional arms, ammunition, and explosive areas (AA&E) should have a 12
foot (3.6 m) minimum clear zone between the perimeter barrier and exterior structures,
parking areas, and any topographical features and a 30 foot (9.2m) minimum clear zone
between the perimeter barrier and structures within the protected area. Corrections
Systems Facilities should provide clear zones for guard towers to have a clear view of
at least 80 feet (24.4 m) in all directions along the perimeter fence.
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Air Force A clear zone should be created at least 30 feet (9.2 m) on both sides of a
single boundary barrier. For areas with 2 fences, a clear zone of at least 30 feet (9.2 m)
inside the inner fence and 30 feet (9.2 m) outside the outer fence should be maintained.
Areas with animal control fences are not considered to have a dual fence. Consider
moving all possible dips, ridges, ditches, and objects that could conceal an intruder or
obstruct vision. Poles (lighting, power, camera, etc.), overhead wires, and other
features should be positioned so they cannot be used to circumvent the sensor system
or fence.
Navy Perimeter fencing should maintain a combined 50 foot (15.2 m) minimum clear
zone on both sides between the perimeter barrier and exterior structures, parking areas,
and protected area. Areas with minimum security levels should maintain a 20 foot (6.1
m) minimum clear zone between the perimeter barrier and exterior structures, parking
areas, and any features, and a 30 foot (9.2 m) minimum clear zone between the
perimeter barrier and structures within the protected area.
USMC Interior/exterior clear zones will be a minimum of 33 feet (10.1 m), with the
interior clear zone being no less than 20 feet (6.1 m), and the exterior clear zone being
no less than 10 feet (3.05 m). Clear zones for arms, ammunition, and explosive (AA&E)
facilities will remain at a 30 feet (9.2 m) interior clear zone and a 20 feet (6.1 m) exterior
clear zone. Where possible, a larger clear zone should be provided to preclude or
minimize damage from thrown objects such as incendiaries or bombs.
Objects that present no aid to circumvent the perimeter barrier or do not provide
concealment to an intruder (such as patrol roads, perimeter light poles, fire hydrants,
steam pipes, etc.) may be permitted to stay within the clear zone, based on an
evaluation of the installation mission, congestion adjacent to the security fence line,
resources being protected, and flightline security requirements.
If an adequate clear zone is not provided, a combined fire break of 50 feet (15.2 m) in
width should be provided along both sides of the security fence line of barriers
surrounding restricted and non-restricted areas. However, if the clear zone
requirements stated in the service exceptions above are met, a fire break is not
required. Fences should be placed a minimum of 20 feet (6.1 m) inside the facility’s
property line. Fences not along the property lines are directed to establish a clear zone
of at least 20 feet (6.1 m) or greater outside of the fence line.
All nuclear weapons sites should maintain a clear zone of at least 30 feet (9.2 m) inside
the inner fence, the area between fences, and 30 feet (9.2 m) outside the outer fence.
Electronic Security Systems (ESS) may be used to increase the probability of detection
and the assessment of intruders attempting to enter restricted areas. ESS includes
Intrusion Detection Systems (IDS), Access Control Systems (ACS), and Closed Circuit
Television (CCTV) for assessment of alarm conditions. The design of fences, gates and
guard facilities should support the site specific design of the ESS. The following
sections outline general guidelines to be used in planning for these systems as a
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reference for the design engineer, but are not intended to replace the requirements for a
given site. Further information on Electronic Security Systems can be found in UFC 4-
021-02NF and UFC 4-020-04FA.
To support an ACS or IDS, a gate would require two to three, 1-inch (25.4 mm)
conduits. These conduits would typically serve a card reader, buried loop sensor, and
control wiring to the gate motor control. For a CCTV system, conduits will be required
to run the power and video cabling from the Site Security Center to the camera
locations. Power is typically required at exterior camera locations for heaters and
pan/tilt/zoom capabilities. Typically a 1-inch (25 mm) conduit for the video cabling and a
¾-inch (19 mm) conduit for the power wiring would be adequate to serve several
camera locations in a particular zone. The required number of conduits will depend on
the quantity and layout of cameras required to cover each zone.
Taut wire sensor systems employ signal processors mounted on the fence line. Each
fence mounted signal processor requires a conduit run back to the installation/base
security operations center (Regional Operations Center (ROC), Emergency Operations
Center (EOC). The actual conduit size may vary depending upon the quantity of signal
processing units served. At a minimum, one 1-inch (25 mm) conduit should be provided
for each signal processing unit. Microwave and infrared sensors employ a transmitter
and receiver for each zone. Each transmitter will require a conduit back to the
installation/base security operations center. The actual conduit size may vary
depending upon the quantity of transmitters served. At a minimum, one 1-inch (25 mm)
conduit should be provided for each transmitter. Ported coaxial sensors or buried line
type sensors employ a transmitter and receiver for each of two buried coaxial cables for
each zone. Each transmitter/receiver will require a conduit back to the installation/base
security operations center. The actual conduit size may vary depending upon the
quantity of transmitter/receivers served. At a minimum, one 1-inch (25 mm) conduit
should be provided for each transmitter/receiver.
2-14.2 Taut-Wire.
Taut-wire systems maintain low false alarm and nuisance rates, can be use in all
terrains and harsh environmental conditions, and provide a high probability of detection.
However, high cost and high maintenance requirements are to be considered before
installation. Maintenance requirements include maintaining appropriate individual wire
tension and separation between wires.
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The type of taut-wire sensor system used will vary based on the manufacturer; however,
before designing taut-wire sensored fences, the NAVFAC Antiterrorism and Force
Protection Ashore Program should be contacted for the latest installation requirements.
A double row of fencing can be used around the perimeter or internal restricted areas to
increase the level of security. If double rows of fencing are used, sensors and
detectors, or a perimeter patrol road between the fences should be considered. The
first line of fencing provides the boundary for initial detection, so that either sensors on
the first fence or sensors monitoring the area between the fences, performs the initial
detection. The second fence then acts as a delay element giving the response forces a
tactical advantage.
Patrolled perimeter fencing enclosing an area generally greater than 1 square mile (2.6
sq Km) should provide an interior, all-weather perimeter road in all areas not affected by
impassable terrain features for security-patrol vehicles. Drainage ditches parallel to
patrol roads are designed to utilize shallow or low angle side slopes to prevent
obscuring the observation from a 4-foot (1.2 m) high line of sight above the road
surface. Where patrol roads pass through clear zones, precautions should be taken in
roadway design to preclude concealment for intruders.
Army Corrections Systems Facilities should provide patrol roads around the perimeter
of the facility to accommodate vehicular and foot patrols.
Secure drainage openings (drainage ditches, culverts, vents, ducts, and other openings)
having a cross-sectional area greater than 96 square inches (620sq cm) that pass
through any security fence with welded bar grill or locked manhole covers.
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Drainage structures and water passages passing under fences should be barred to
provide penetration resistance equivalent to the fence above.
Grills should be placed on the attack side in all cases. Care should be taken during
design to assure that bars and grills across culverts are not susceptible to clogging. All
utility openings are intended to be designed with a debris catcher to permit either rapid
clearing or removal of grating for cleaning when required.
Steel pipes that pass under fences should have grills welded to the pipe as shown in
Figure 2-5. For concrete pipes that pass under fences, the grill ends should be welded
to a steel rim that fits snugly over the concrete pipe. The rim and grillwork may be
fastened over the concrete pipe and bolted or pinned to the rim of the concrete pipe as
shown in Figure 2-6. Grill ends may be embedded in a concrete headwall that
encapsulates the concrete pipe.
Culverts that are located under security fences should have a concrete headwall at the
upstream end with cross-hatched ⅜ inch (9.5 mm) diameter steel bars embedded 6 inch
(152 mm) deep in concrete. Bars should be spaced 9 inches (228.6 mm) on center and
welded at their intersections.
Inlets for utility openings that are outside of the fence line should have a debris catcher
with grating. As shown in Figure 2-7, outlets for utility openings that are outside of
fence line should have a debris catcher on the inlet side, inside the fence line, with the
grating on the outlet side. Caution should be taken when using debris catchers to
ensure that plugging and flooding of the area surrounding the headwall do not occur.
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In lieu of installing grid in utility pipe itself provide manhole covers, 10 inches (254 mm)
or more in diameter, covering a utility which passes through security perimeter fencing
of a restricted access area should be secured with locks and hasps by welding them
shut, by bolting them to their frame, or by using keyed bolts. Hasps, locks, and bolts
should all be made of materials that resist corrosion.
See Appendix B for notional design details of drainage culverts with utility openings.
Provide a screen arrangement below fencing using vertical and/or horizontal steel bars
or pipes for ditches and swales receiving frequent water flow. Provide a maximum
spacing of 9 inches (229 mm) between either vertical or horizontal bars. Possible
debris should be considered when designing the spacing between bars. Crossing bars
should be welded at each intersection, with bars embedded 6 inches (152 mm) into
concrete and fastened to the bottom rail of the crossing fence. See Figure 2-10.
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Analyze the hydraulic capacity of ditches, swales, and culverts to verify the bar grill will
not decrease the channel flow capacity below the maximum expected design flow.
Tunneling prevention should be used in areas containing “soft” soils. UFC 3-220-10N
describes “very soft” and “soft” soils as those that can be extruded between fingers
when squeezed and/or molded by light finger pressure. Classification of soils shall be in
accordance with ASTM D 2487, Standard Practice for Classification of Soils for
Engineering Purposes (Unified Soil Classification System), and ASTM D 2488,
Standard Practice for Description and Identification of Soils (Visual-Manual Procedure).
Areas with a soil analysis indicating that “soft” soils are present should embed fencing in
a continuous concrete curb. The recommended depth of the curb will be determined
from the soil analysis and the frost depth at the facility. The frost depth for the subject
areas should be considered to assure that heaving of posts and curb cannot occur
during the winter. If the soil analysis does not indicate tunneling may occur quickly,
continuous concrete curbing may still be considered as an added protective measure.
Nuclear sites with very sandy terrain are directed to have a soils engineering analysis to
determine the recommended depth of the concrete curb. Restricted access facilities
with a risk of tunneling may provide infrared IDS for tunneling protection. These
systems may be passive or active sensors and may be used in conjunction with seismic
sensors. Welded wire mesh fence systems may incorporate additional fence panels for
burial on the secure-side of the perimeter and tie-wired to the vertical panels to deter
tunneling.
Security measures to deter vehicular aided intruders include installing passive barriers
such as berms, ditches, bollards, reinforced fences or concrete planters to strengthen
perimeter boundaries. Active vehicle barriers such as cable beam barriers, retractable
bollards, steel wedges or plates, or crash gates, may be used against the moving
vehicle tactic. Refer to UFC 4-022-02, Selection and Application of Vehicle Barriers for
information and guidance on the selection and application of vehicle barriers.
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2-17 SIGNAGE.
Signs should be posted at intervals no greater than 200 feet (61m) along the entire
perimeter of the installation. Signs may also be placed where boundaries make abrupt
changes in direction. Perimeter signs are directed to read “U.S. GOVERNMENT
PROPERTY – NO TRESPASSING.” If the perimeter barrier is the exterior wall of a
building or structure, signs should be posted at all points of ingress. Posting of signs is
not required in camouflaged tactical areas. Restricted area warning signs are requested
to be placed at intervals of no more than 100 feet (30.5 m) and where boundaries make
abrupt changes in direction. Reflective surfaces for signs may be considered.
Warning signs located in areas with widespread illiteracy may use accepted danger or
warning symbols. Signs should use white for the sign’s background color and words
"WARNING" and "USE OF DEADLY FORCE AUTHORIZED" in red with the remaining
words in blue or black. Signs should be placed so as not to aid intruders in climbing
fences and breaching boundaries. In foreign countries, or in areas where languages
other than English are predominate, each sign should show messages in English and
the host-nation language.
All restricted area fencing containing IDS should mount warning signs on posts, in the
ground, outside the fence so they do not interfere with the IDS.
Air Force Restricted areas containing Protection Level 1 resources should construct
signs directing the removal of ignition keys from parked vehicles and place these signs
next to and inside restricted areas. Areas with security systems that are supported by
military work dogs may post Air Force Visual Aid (AFVA) 31-206, Military Working Dog
Notice, directly below AFVA 31-211 and AFVA 31-230 or AFVA 31-101 signs. These
signs should use a white background and blue or black for the lettering. Restricted
warning signs may use the AFVAs 31-101 Restricted Area Sign, 15 X 18 and 31-102
Restricted Area Sign-National Defense, 8 X 17 designs. Warning signs installed at
vehicle entry points are intended to follow the Air Force Visual Aid (AFVA) 31-230
Installation Warning Sign 36X30 design. Warning signs installed at each pedestrian
entry point and strategic locations such as runway approaches, closed gates, fence
corners, and roads that dead-end on a perimeter fence, etc. should follow the AFVA 31-
211 Installation Warning Sign 18X15 design.
Navy Consult OPNAVINST 5530.14D for guidance on how signs for restricted and
perimeter areas and Navy installations should read.
Refer to UFC 03-530-01, Interior and Exterior Lighting and Controls for appropriate
security lighting criteria.
Refer to UFC 03-260-01, Airfield and Heliport Planning and Design for flight line
requirements and Air Force Engineering Technical Letter (ETL) 01-20 for airfield
frangibility requirements.
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CHAPTER 3 GATES
Personnel gates are intended to be designed to permit only one person to approach the
guard at any time. Turnstile gates may be considered to control personnel entry.
Personnel entry gates at nuclear storage areas should include access and exit routes in
accordance with DoD 5210.41.
Single swing gates should be designed with a minimum 4 ft (1.2m) wide opening, by a
minimum of 6 ft (1.9 m) high, with an additional 1 ft (305 mm) of three strand barbed
wire added to the height if barb wire is part of the fence structure. The gate opening
should not exceed a width of 14 ft (4.3 m). Gate frames should be constructed from 2 in
(51 mm) (outer diameter) rails or 2 in (51 mm) square members welded in all corners.
Gate posts are intended to meet the requirements of ASTM F 900.
For pedestrian use, single swing gates may be considered as the second alternative to
turnstile gates. Operational and guard personnel requirements may be considered to
determine the most economical long-term cost for the facility. See Figure 3-1 for a fixed
and welded single swing gate example.
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Turnstile gates are manufactured as single or tandem and are available for ADA
access. Tandem turnstile gates should be considered where high volumes of
pedestrian traffic are exchanged from both sides of the perimeter such as shift work.
Only full height turnstile gates are permitted for access through security fencing.
Automated access control systems such as card readers, push button, and wireless
remote can be incorporated to access turnstile gates. Metal detectors and counters are
also available as accessories. Movement of travel can be set for clockwise,
counterclockwise, or bi-directional. Arms and barrier tubing are 1-3/4 in (44.5) diameter,
14 gage. Overall exterior height is 91 in (2.31 m) with a pedestrian walk through height
of 84 in (2.13 m). See Figure 3-2 for a turnstile gate example.
Navy NAVFAC DM-13.02 should be reviewed for specific information concerning these
access control systems. Setting gates to revolve in only a specific direction (exiting)
may be considered to reduce the need for an exit guard.
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Vehicular gates should limit opening sizes when possible to decrease open/close cycle
time. There is no maximum height for vehicular gates. Coordinate gate height with
surrounding/adjacent security fencing, and the width will be at least as wide as the road
entering the gate. The operational requirements for the gate should be evaluated to
determine which gate type is most suitable. Analysis for all vehicular gates should
consider daily peak of vehicular traffic and the operational access control requirements
for the secured area to determine opening size, gate type, and whether an automatic
operator is needed. Gates used for vehicular traffic that are to be automated shall
conform to ASTM F 2200. Cantilevered, sliding or wheel supported gates are
considered the best selection for vehicle security gates followed by overhead sliding
gates, swing gates, and overhead “guillotine” gates. Areas where snow and ice are
prevalent may consider using cantilever or swing gates instead of tracked sliding gates.
However, if sliding gates are used, consideration should be given to adding internal
heating for gate mechanisms.
Sliding gates should have all entry-exit points secured with a heavy duty sliding steel,
iron, or heavily braced chain link gate equipped with a heavy locking device. The cross-
slope of the road surface should be sloped at a constant grade for the full length of the
gate path to permit proper drainage while maintaining smooth operation of the gate
opening and closing. Where a sliding gate is installed at an existing paved entrance,
the pavement may be filled or leveled where the gate will be installed. Sliding gates
shall conform to ASTM F 1184.
A guide rail or trough across the roadbed is utilized by this type of gate. The trough
provides a smoother surface for vehicular traffic, but is not recommended due to debris
buildup. Single wheel supported sliding gates do not have an opening distance
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UFC 4-022-03
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restriction, but are limited by the power requirements of the gate operator. Wheel
supported gates require 1/3 less straight level storage space along adjacent fence than
cantilevered.
All single cantilevered gates should use full support and suspension of gate frame by
four rollers secured to two posts inside the restricted area. Single cantilevered gates
are not recommended for openings exceeding 24 ft (7.3 m). When an opened gate
rests parallel to existing fence, a straight and level fence line 1.5 times the size of the
opening should be made to accommodate when the gate is fully open. See Figure 3-3
for examples of single cantilevered gates.
Double cantilevered gates are not recommended for openings greater than 48 feet (14.6
m) and should be constructed in a similar manner as described for single cantilevered
gates as shown in Figure 3-4.
All double swing vehicular gates should be designed to swing inward, toward secured
area. A 2 inch (51 mm) maximum clearance should be maintained between the bottom
of fence and the road surface when gate is in closed position. The road surface may be
leveled or sloped downward in the direction the gate opens. Recommend gate
openings for double swing gates are not greater than 28 feet (8.5 m). Table 5 provides
recommended concrete foundation diameters for swing gate posts. A minimum of 3
feet (915 mm) deep concrete foundation should be used for swing gate posts.
Foundations for general fencing shall be in accordance with ASTM F 567. Gate swings
greater than 90 degrees should be designed with a large arc space for proper operation.
See Figure 3-5 for double swing gates.
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See Appendix B for notional design details of single overhead supported gates.
See Appendix B for notional design details of double overhead supported gates.
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Vertical lift gates should have a counterweight with a continuous drive chain on each
side. The vertical lift gate, or “guillotine” gate, should be used where the topography
does not provide enough room to store the gate adjacent to the fence line.
The gates discussed in Section 3.3 are non-reinforced gates and not considered to
resist impact by vehicles. Standard non-reinforced gates can be retrofitted with cables,
chains, and deadman anchors to increase their resistance to penetration by vehicles. In
addition, there are proprietary, rated active vehicle barrier gate systems that are
designed to resist penetration by vehicles. See UFC 4-022-02 for more information on
active vehicle barriers. Cables used should be a minimum 3/4 inch (19 mm) wire rope
and be in accordance with Federal Specification, FS FF-C-450. Welded alloy steel
chains should be 1/2 inch (13 mm) diameter. Padlocks used with this system should be
medium security padlocks. Application of deadman anchors should be in accordance
with previous sections 2.12 and 2.12.1.
For swing gates, the cable should be looped around the gatepost, the gate frame
upright, and through the fence cable loop. It should be strung across the inside of the
gate leaf and fastened around the vertical gate frame upright and fabric tension bar
midway above the road surface. The cable should be terminated with a swaged loop or
wire rope clamp around the gatepost to interconnect with the gate cable barrier system.
All cable ends may be looped and terminated with either four wire rope clamps or
hydraulically swaged wire rope fittings. Remove sheathing on covered cables at
connections so that the connections can be properly made and rated. These wire ropes
should then be chained together and fastened with padlocks to create a continuous
barrier. The wire ropes should be positioned as to not interfere with gate operations
when the chain is removed. Figures 3-6 and 3-7 provide illustrations for reinforced
gates.
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For sliding and vertical lift gates, the same materials should be used for reinforcement;
however, the cable placement may vary. These gates should have the cable running
along the length of the gate in the inside and looped around the frame in an appropriate
place. The cable should be terminated and fastened as described previously in this
section.
There are times when a gate reinforcement cable barrier system is desired but a cable
reinforcement system for the adjoining fence is not necessary since terrain, natural
barriers, structures, or other passive barrier features provide vehicle crash protection
adjacent to the gate. In such cases, the gate cable system can be terminated directly
on each side of the gate with the deadman anchors.
Hinge selection should consider size of the gate and frequency of use. Weld hinges to
the gate post and gate frame if increased resistance against tampering is desirable. In
addition, hinges may incorporate welded security top plates, reverse the direction of
hinge pins, or have the hinge pins spot welded to provide increased tamper resistance
and displacement during an incident.
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Gates at nuclear weapons storage sites should have sally-ports that consist of an
enclosed area between two gates so when the inner gate is open the outer gate is
closed and when outer gate opens inner gate closes. Nuclear facilities should also
have automatic latching devices for vehicular and personnel gates. When locking
hardware is not practicable, ½ inch (12.7 mm) chains, Type 1, Grade C, Class 1, in
accordance with U.S. Federal Specification RR-C-271, will be used with an approved
medium security padlock.
See Appendix B for a notional design detail of a chain and wire rope locking system.
Locate all gate operators to prevent tampering from outside the fence. Coordinate
design of gate operating systems with the Command Safety Officer to ensure
consideration of site particular operating accessories, warning devices, and safety
systems. Provide powered gate operators for vertical lift gates unless use is infrequent
and manual operation is reasonable. Powered gate operators with automatic latching
systems should be provided at nuclear storage facilities.
Automated sliding gates at restricted areas should use hydraulic compression rail gate
power-operators.
Swing gate power operators may be either hydraulic piston or electromechanical swing.
Areas with frequent snowfall should use hydraulic piston type operators for increased
reliability.
Access Control is a primary design consideration for gate systems. The design of gates
should consider and address the following items to ensure proper specification of
power-operator accessories and controls.
y Pedestrian traffic
y Traffic flow
y Type of vehicles
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Army For standard drawings of guard booths and gatehouses see Army Access
Control Points, Standards Definitive Design; December 2004, prepared by United
States Army Corps of Engineers (USACE), Protective Design Center, Omaha District.
(https://pdc.usace.army.mil/library/drawings/acp)
4-1.1 General.
When selecting an Entry Control Facility (ECF)/Access Control Point (ACP) site,
consider the existing terrain. Flat land without thick vegetation and a gentle slope up to
the gatehouse is advantageous for a clear view of the arriving vehicles. Where possible,
it is encouraged to utilize natural barriers such as bodies of water and densely wooded
areas to secure the perimeter. A traffic investigation should be completed to determine
the anticipated demand for access to the facility, the traffic origin and destination, and
the ability of the existing road network to incorporate the ECF and additional traffic.
Coordinate with the local Department of Transportation during the planning and the
design phases, as traffic changes at ECF/ACP typically impact civilian traffic patterns.
Vehicle inspections or searches are intended to be possible without causing undue
traffic backups.
The guard facilities at the ECF should provide a comfortable, safe working environment
for security personnel. Generally, a single gatehouse centered in the entry control
facility may be utilized, or alternatively the gatehouse or sentry booth may be located to
the side of the roadway. The gatehouse could also be located after the last rejection
point (turn-around) to give security personnel in the gatehouse an overall view of the
Access Control Zone operations and vehicles directed to the rejection point or vehicle
inspection area. If the gatehouse is located to the side of the roadway or after the last
rejection point, consider providing a sentry booth in the central island of the access
control zone or in between entry lanes to provide easily accessible shelter and
protection for the guards operating the ECF.
Army The Army recommends the gatehouse be located after the ID check point
between inbound/outbound lanes, or on the right shoulder, to observe all activities in
and around the ID check point.
Since guard facilities are located in the immediate vicinity of the explosive threats they
are trying to prevent from entering the installation, it is impractical and impossible to
provide protection from the possible effects of an explosive device. In addition, the
occupancy of the facilities is typically below the threshold for the requirements of UFC
4-010-01. Therefore, no protective design elements are required for guard facilities to
mitigate the effects of an explosive device. Paragraph 4.1.5.3, discusses protection
from other potential threats and tactics.
For areas with special weapons storage, arrange the entry gate to permit only one
person to enter at a time to ensure they remain fully under the control of the security
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When properly documented in accordance with Service requirements that only able-
bodied security personnel utilize guard facilities, the facilities are not required to meet
Americans with Disabilities Act Accessibility Guidelines (ADAAG) requirements.
Where guard facilities are located near the roadway, provide a minimum platform width
of 3 feet (914 mm) behind the curb. This width is the minimum necessary for security
personnel to stand post adjacent to the facility, therefore additional platform width is
recommended to provide additional safety through increased lateral clearance and
space for security personnel carrying weapons or equipment.
In addition to the guard facilities, a shelter should be provided near any inspection lane
for occupant of a vehicle that is to be searched. The shelter should be similar to a bus
stop shelter, with see-thru walls to allow security personnel to observe the vehicle
occupants at all times.
Navy and USMC Plan guard facilities in accordance with NAVFAC P-80.
4-2.1 Gatehouse.
The gatehouse serves as the central control center for the ECF and provides shelter for
security personnel. Every ECF should have a gatehouse, designed to support a
minimum of three security personnel. As the control center, the gatehouse controls the
vehicle barricades, traffic control devices, access controls, and lighting. Do not locate
controls for other aspects of an installation security system in the gatehouse or other
facilities associated with an ECF. Locate the installation security center or emergency
control center within the controlled perimeter of the installation. The gatehouse should
serve only as the control center for equipment associated with the ECF.
Base the design of the gatehouse on consideration of the following equipment and
functions:
y Communications equipment;
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y A unisex restroom.
The location of the overwatch position should also be designed to afford personnel the
ability to assess the threat, initiate alarms, activate the barrier system (if other personnel
are incapacitated), and respond to the attack with force if necessary and authorized.
Therefore the overwatch position should be located to provide a minimum of four (4)
seconds of reaction time from the time a threat is detected or alarm is initiated. The
threat scenarios and guidelines for assessing the required response time and the
distance required in order to provide sufficient response time are discussed in UFC 4-
022-01.
In most cases the overwatch position will be located at or near the end of the response
zone in order to provide sufficient distance for this response. Coordinate the facility
location with security personnel to ensure proper line of fire and safety considerations.
If required, elevate the facility to aid the observation of incoming traffic and reduce
incidental/collateral damage by creating a plunging fire scenario.
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4-1.5.2 Construction.
Design the facilities as required in UFC 1-200-01, General Building Requirements, and
UFC 3-310-01, Structural Loads. Consideration of the corrosion resistance and
maintenance requirements of the guard facilities, especially pre-manufactured facilities,
is important due to varying geographic areas, such as shore side exposure, and the
high visibility of these structures.
Determine the required physical security design features in accordance with installation
requirements and UFC 4-020-01. Threats that may commonly be considered include
forced entry and ballistic attack. Provide ballistic protection equivalent to UL 752 Level
III (formerly SPSA) for all guard facilities as a minimum. Provide this protection in the
design and construction of the exterior envelope including windows, doors, walls and
other equipment. It is not required for openings or penetrations for weapons in guard
facilities, such as the overwatch position. Another consideration in establishing the
minimum level of ballistic protection is ensuring protection from the weapons carried by
security personnel at the ECF. Table 5 provides examples of the wall thickness
required for commonly encountered materials to provide an adequate ballistic
resistance against UL 752 Level III. Additional information and guidance can be found
in UFC 4-023-07.
Air Force Construction of guard facilities should meet the minimum ballistic
requirements of UL 752 Level V. See Table 4-2.
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Table 4-1: Thickness of Common Materials for Resistance Against UL 752 Level
III
Air Force
Table 4-2: Thickness of Common Materials for Resistance Against UL 752 Level
V
Some mechanical equipment installed in the exterior envelope of a guard facility may
not be capable of providing sufficient ballistic resistance. Therefore, locate the
equipment to minimize potential exposure to projectile penetration or provide ballistic
hardened equipment and/or louvers. As an example, it may be prudent to install the
HVAC equipment on the roof of the gatehouse or sentry booth to reduce penetrations in
the walls. Provide roof ballistic protection only where there are sightlines to the roof.
4-1.5.4 Windows.
Provide limited view window glazing. Glazing should limit viewing into the facility to the
extent possible without restricting views out of the facility during day and night
operations. The intent is to reduce the visible signature of security personnel, as seen
from the outside of the gatehouse, without reducing the ability of security personnel to
see out. The IESNA HB-9 suggests specular-reflecting, low transmission glazing at a
tilted angle can be used in the windows to limit view into the guard facilities from the
exterior.
See paragraph 4.1.5.3 for ballistic resistance requirements. Any windows provided in
the overwatch positions should not interfere with the capability to respond to an attack.
Therefore, any windows should be capable of being fully opened/removed quickly or
have a substantial gun port to enable unobstructed line of fire from the position. Without
these capabilities the overwatch positions should have no windows in the exterior wall
openings. If ballistic resistant glazing is maintained for some portion or all of an
opening, consider the visibility through the glazing after it has been impacted during an
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attack. Some ballistic resistant glazing materials provide better visibility characteristics
after impact than others.
4-1.5.5 Floors.
Construct floors with reinforced concrete with a finish floor elevation of six inches (152
mm) above grade or the adjacent walkways unless located on a raised island, in which
case the elevation will be that of the raised island. Provide a 3 foot (915 mm) apron
around the outside wall. Design floors and walkways to have an anti-skid surface. Also
provide anti-fatigue mats to relieve fatigue and discomfort from standing for long
periods.
Provide heating and cooling appropriate for personnel, the electronic and electrical
systems or fixtures, and the security support equipment. The HVAC requirements
should be based on existing service design guidance and installation requirements.
Consider protection from chemical or biological agents used during an attack based on
the anticipated threats. However, due to the small size of the facility, comprehensive
protection is often not feasible. In order to limit airborne contamination and maximize
the time for security personnel to shelter in place in order to initiate a response, utilize
protective gear, and respond to an attack, the design of the HVAC system should
include minimum measures such as those outlined in UFC 4-010-01. Design features
include elevated air intakes, emergency air distribution shutoff switch (or easily
accessible controls), and the use of gasketed doors and windows to minimize air
leakage.
4-3 LIGHTING.
The interior lighting should be diffused lighting and should be provided with dimmer
controls to aid with night vision and reduce the ability of those outside the guard facility
to see inside. The interior lighting should be connected to the backup power source.
As discussed in the IESNA HB-9, the illuminance inside the guard facility should be
limited to the minimum required for comfortable completion of the expected tasks and
functions. As indicated in Figure 29-17 of the IESNA HB-9, the recommended average
illuminance for the gatehouse is 30 footcandles (300 lx) on the work plane in the
gatehouse. Additional recommendations from the HB-9, include providing well-shielded
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task luminaries to avoid reflections on monitors and windows. Also providing specular-
reflecting, low transmission glass at a tilted angle and painting the inside of the
gatehouse dark colors limit the view into the guard facility. Consider providing magenta
filters for interior lighting to lessen the impact of interior lighting on the night vision of
security personnel. Exterior lighting for sentry/guard booths and gatehouses should be
in accordance with UFC 4-022-01.
4-4 GROUNDING.
4-5 UTILITIES.
Provide water and waste system service for general use and for the unisex restroom in
the gatehouse. If it is technically impossible or economically infeasible to provide these
utilities to an ECF due to site constraints, the installation may wave the requirement to
provide the water and waste utilities.
Air Force Install a toilet, sink, and outside water faucet with a hose bib.
Provide capability for communication equipment, including local area network (LAN),
phone, and computer with Internet access. See UFC 4-022-01 for additional guidance.
Towers will be located inside the inner clear zone of the security fencing system. The
height to the cabin floor should be between 25 and 50 feet (7.6 and 15.2 m); it varies
based on visibility and land terrain. Towers located on the waterfront (shoreline or end
of piers) should be elevated to have the line of sight above nearby ships. The door of
the tower should face another tower to allow for visual monitoring. Towers should be
spaced at a maximum of 300 feet (91.4 m) apart and have an uninterrupted view of a
minimum of 240 feet (73.1 m) in any direction along the perimeter fence. Towers must
be able to observe the entire inner and outer clear zones and fence line.
Conduct a thorough site analysis and review of operational requirements for the
restricted area involved prior to initiating design of guard towers. While there is no
specific size or floor spacing criteria for tower cabins, the designer should use
analogous criteria contained in NAVFAC P-80. See UFC 4-020-01 for determining a
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ballistic threat level and UFC 4-023-07 for the material requirements to mitigate the
threat.
The first consideration is the number of personnel that will be assigned during normal or
alert operations. Make a careful review of electronic and electrical equipment (e.g.,
communications equipment and, plumbing and mechanical support equipment (HVAC),
and storage space (e.g., AA&E storage). Provide adequate space for the equipment, in
addition to security personnel space allocations. Ensure that the surface area of any
required counter or work space is added to the overall floor space requirements for the
tower cabin.
4-7.2.2 Construction.
Design the facilities as required in UFC 1-200-01 and UFC 3-310-01. Also, a new
concept in guard tower design was developed by Sandia National Laboratories in
Albuquerque, New Mexico. Their design consists of using pre-cast concrete double tee
beams, with a 28-day compressive strength of 5,000 psi (34.5 MPa), placed vertically to
form the walls, and a pre-cast concrete cab placed atop the structure to house guard
quarters and surveillance equipment. The tower should be supported on a spread
footing with a maximum allowable bearing of 2,300 psf (110 kPa); some areas may
require special foundations, i.e. piles or caissons. All walls should be a minimum of 4 in
(101 mm) thick.
4-7.2.3 Windows.
Windows must be no less than 3 feet (915 mm) high in size and placed a minimum of 3
feet above the floor surface. Having windows continuous around the cabin may be
considered as it increases visibility. Windows must meet the same ballistic threat level
as the cabin construction itself.
The stairs up to the tower should have periodic landings for climbing ease and to
facilitate maintenance of the inside of the tower. A rectangular configuration is
recommended to a circular one. Provide ballistic-resistant enclosure for the stairwell if
required based on the determined threat level and required level of protection. See
UFC 4-023-07 for additional guidance on ballistic protection.
Stairs should be installed with a max angle to the horizontal of 50 degrees per 29 CFR
part 1901.24 whenever possible.
Where conventional stairs cannot be installed, “ship stairs” shall be installed at a slope
of between 50 and 70 degrees from the horizontal. (OSHA standard interpretation dtd
2/10/2006)
Consider installing equipment such as HVAC at lower level to provide safer access for
maintenance personnel and their tools/equipment.
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Rational: To ensure access meets OSHA standards and NFPA 101 code requirements
and to highlight the need to consider providing easier access for maintenance
personnel.
Ensure the system consists of a cabin with a roof, floor and sidewalls, access hatches,
vision windows, and gun ports with an optimal hardened tower “tunnel.” Optional
hardened “tunnel” with circular or standard riser stairway, hardened personnel access
door, shrouded HVAC ports, and a security lighting package may be ordered from
manufacturers; all other parts are standard. Cover steel surfaces with rust inhibiting
primer and finish paint.
4-10 LIGHTING.
The tower cabin should be equipped with dimmer controlled lights to aid with night
vision and additional security to the occupants. Provide a night light with red lens and
remote emergency lighting. The roof of the cabin should have a movable searchlight
controllable from the interior of the cabin. All lighting should be connected to a standby
power source for restricted areas.
Air Force Provide alternate power source and battery sustained emergency egress
lighting. Install so it provides shadow free light and clearly illuminates physical
appearance of individuals, hand carried objects, and clothing.
Army Provide adequate outside security lighting and have wire mesh or safety glass
covering it for protection from breakage. Use perimeter and interior lighting to ensure
observation of all possibilities for escape. The emergency generator will be adequately
secured and controlled, inspected weekly, and tested monthly under load conditions.
4-11 GROUNDING.
4-12 FORTIFICATION.
Gun points located around the cabin should be designed to ensure that the security
fence and entire clear zone can be brought under fire. Consideration should also be
given to the compatibility of gun ports to the types of weapons and attachments to be
used, such as night vision scopes.
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GLOSSARY
Term Definition
Active Sensors A sensor that can receive signals from either itself or other devices.
Anchor Plates A square metal plate created to be placed on top of a deadman. The plate
has a hole through the center for the cables and turnbuckles to protrude.
Anti-ram Reinforcement Cable reinforcement on the secure-side of gates or fences to protect area
from active vehicles.
Attack Side The outer side of the perimeter fence for a restricted area. The side from
which to expect attacks or forced entry.
Auxiliary Power Supply An alternate power supply to be used in the event that the primary source is
unavailable.
Barbed Tape Concertina A steel strip, reinforced or non-reinforced, fabricated in a single or double coil
configuration. The fabricated tape has sharp barbs, or cluster of barbs,
intended for use as an anti-personnel barrier.
Barbed Wire Protective wire available with the 4-point barbs spaced either 3 inches or 5
inches (75 or 127 mm) apart.
Blast Wall A wall built to withstand an explosion to protect the occupants both from the
blast and the debris from the blast.
Bollards Reinforced concrete shapes or sleeves, or steel pipe filled with concrete, used
to slow down vehicles and/or deny vehicle access.
Brazed To solder (two pieces of metal) together using a hard solder with a high
melting point.
Clear Zone Area free of obstacles, topographical features and vegetation which reduce
the effectiveness of the physical barrier, impede observation or provide cover
and concealment of an intruder.
Color Polymer Coating A coating on chain link fences to further protect and add color.
Concrete Sill or Curb A concrete section to create a non-passable connection between a fence and
the existing ground.
Corrosive or Salt Laden Atmosphere Atmosphere which contains enough salt or corrosive elements to corrode a
fence enough to decrease the intended strength. These areas are typically
bordering oceans or other water bodies.
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Term Definition
Deadman Anchor An anchor for fence or gate reinforcement cables which transfer the force
from the fencing or gate fabric/surface to the ground. Deadman anchors are
typically concrete blocks buried in the ground.
Electromechanical Chain Driven An electric motor driving a series of reduction and worm gears, chains, and
sprockets which in turn drive a chain to the gate for operation.
Electromechanical Rack and Pinion An electric motor operating, through gear reduction, a rack and pinion gear
arrangement attached to the gate for operation.
Electromechanical Swing An electric motor, through gear reduction, operating a primary arm that travels
in an arc parallel to the ground. A second arm is attached between the gate
leaf and the primary arm for operation.
Electronic Security System (ESS) The integrated electronic system that encompasses interior and exterior
Intrusion Detection Systems (IDS), Closed Circuit Television (CCTV) systems
for assessment of alarm conditions, Automated Access Control Systems
(ACS), Data Transmission Media (DTM) and alarm reporting systems for
monitoring, control and display.
Entry Control Facility/Access Control Entry control facilities/access control points ensure the proper level of access
Point (ECF/ACP) for all DOD personnel, visitors, and commercial traffic to an installation.
ECF/ACP encompasses the overall layout, organization, infrastructure, and
facilities to secure the installation from unauthorized access.
Eye Ends Center space created when looping a wire for termination or reinforcement.
Fabric Diamonds The opening formed by the woven wires in chain link fence fabric.
Fabric Fasteners Small metal wires, clamps and bolts used to securely fasten the fencing fabric
to the tension wires or posts.
Fabric Tension Bar A bar that the fencing fabric is attached to and it serves to hold the fabric tight
to decrease ability to deform.
Fencing Accessories Any fasteners, ties, wires or other objects used to attaching the fencing fabric,
posts or top guards.
Fire Break A safety zone containing no flammable vegetation that surrounds an area or
facility.
Gate House A manned structure located at the entrance gate to control entrance.
Gate Leaf A panel of a gate (There is one gate leaf for single fences and two for double
fences).
Gates Openings in the barrier system to allow authorized entry and exit.
Hasps A metal fastener with a hinged slotted part that fits over a staple and is
secured by a pin, bolt, or padlock.
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Term Definition
Ingress An entrance to the restricted area.
Inner side/zone The inside of the fence that is being protected through various security
measures.
Intrusion Detection System (IDS) A system consisting of interior and exterior sensors, surveillance devices, and
associated communication subsystems that collectively detect an intrusion of
a specified site, facility or perimeter and annunciate an alarm.
K-Clamps A fastening clamp that holds the piece on both sides with plates that is bolted
together.
Line Posts Intermediate posts spaced a maximum of 10 feet (3 m) apart and considered
the backbone of the fence line.
Moving Vehicle Bomb Tactic A forced entry tactic to place an explosive or other damaging terrorist device
in a moving vehicle to create a mobile vehicular weapon.
Natural Boundaries Natural formations such as bodies of water, rough terrain, or densely wooded
areas that may act as a barrier to define and protect the restricted area's
perimeter.
Outriggers Metal top guards which are placed on the top of the barrier and may consist of
at least one vertical arm, angled arm facing inside, angles arm facing outside
or two angles arms facing both inside and outside. In addition, there may be
more than one arm on each side if desired. The number and direction of
arms depends on the nature of the barrier.
Passive Barriers A passive barrier has no moving parts. Passive barrier effectiveness relies on
its ability to absorb energy and transmit the energy to its foundation. Highway
medians (Jersey), bollards or posts, tires, guardrails, ditches and reinforced
fences are examples of passive barriers.
Passive Sensors A sensor that receives signals through light or radio waves.
Patrol Craft Water or aircraft that patrol to watch for possible intruders or intrusion
attempts for which ground patrol is inaccessible or inappropriate.
Peak Hour Traffic Peak times when the gate is being operated. This most often occurs during
shift changes or times of generally high traffic.
Protected Side The inside of the fence that is being protected through various security
measures.
Sally Ports Heavy chain link gates that roll upward to open. Personnel sally ports are
used to control entry into highly protected and restricted military areas,
whereas, vehicular sally ports are similar but have a large middle space to
control the incoming/outgoing vehicle and personnel within the vehicle.
Service Branches of the Military under the Department of Defense. Services include
The Army, Air Force, Navy and Marine Corps.
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Term Definition
Secure Side The inside of the fence that is being protected through various security
measures.
Special Nuclear Material (SNM) Nuclear material that requires extensive protection.
Standoff Zone A controlled area surrounding a facility into which only service and delivery
vehicles, and vehicles operated by handicapped people, are allowed. The
perimeter of this area is defined by perimeter barriers and is set at a distance
sufficient to reduce the blast effects of a vehicle bomb detonation on the
protected facility.
Swaged Loop A loop created by looping a wire and fastening the loop with a swaged on
clamp.
Swing Gates Gates for entrance or exit that swing open either manually or automatically
when controlled either electronically or manually.
Taut Wire Wire that is continuously under tension through a series of spring
connections.
Tension Bar The bar that is threaded through the last vertical link of fabric. It attaches the
fabric to the terminal post.
Top Guard Additional protection of fences or other barriers that are placed on top of the
barrier to prevent climbing or jumping. Possible top guards include, but are
not limited to, outriggers with barbed wire, concertina wire, or barbed tape.
Truss Rods A rod used in brace assemblies to draw and hold the line post firmly to the
brace rail. The truss rod uses an adjustable turnbuckle to maintain proper
tension. Truss rod details can be seen in the "Non Reinforced Chain-Link
Fence" drawings in Appendix B.
Turnstile Gates Pedestrian gates which rotate around a central pole to allow only one
entrance at a time.
Uninterruptible Power Supply (UPS) A power supply that will not be affected or interrupted during generator
starting and load transfers.
Welded Bar Grill A series of vertical and horizontal bars that are placed over an opening and
welded at all bar crossing points.
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APPENDIX A – REFERENCES
AFI 31-101 The Air Force Installation Security Program Air Force
AFI 31-101 supplement The Air Force Installation Security Program Air Force
UFC 1-300-02 Unified Facilities Guide Specifications (UFGS) Format Department of Defense
Standard
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UFC 3-260-01 Airfield and Heliport Planning and Design Department of Defense
UFC 3-530-01 Design: Interior and Exterior Lighting and Controls Department of Defense
UFC 4-010-01 DoD Minimum Antiterrorism Standards for Buildings Department of Defense
UFC 4-021-02NF Security Engineering: Electronic Security Systems with Department of Defense
Change 1
UFC 4-022-01 Security Engineering: Entry Control Facilities/Access Department of Defense
Control Points
UFC 4-022-02 Security Engineering: Design and Selection of Vehicle Department of Defense
Barriers
UFC 4-023-04 Security Engineering: Design of Windows to Resist Department of Defense
Explosive Effects
UFC 4-023-07 Security Engineering: Design to Resist Direct Fire Department of Defense
Weapons
UFC 4-141-10N Design: Aviation Operation and Support Facilities Department of Defense
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The notional design details in this appendix illustrate general layouts for each
type of fence or gate. These illustrations are not intended to depict the
importance or size of each element.
B-56
UNIFIED FACILITIES CRITERIA 4-022-03 SECURITY ENGINEERING: FENCES, GATES AND GUARD FACILITIES
DEFINITIVE DRAWINGS FOR SECURITY FENCING, GATES AND CABLING
UFC-700