### ITEM F-162 CHAIN-LINK FENCES

DESCRIPTION

**162-1.1** This item shall consist of furnishing and erecting a
chain‑link fence in accordance with these specifications and the details
shown on the plans and in conformity with the lines and grades shown on
the plans or established by the Engineer.

MATERIALS

**162-2.1 FABRIC**. **\[The fabric shall be woven with a 9‑gauge
\[galvanized steel wire\] \[polyvinyl chloride (PVC)‑coated steel\]
\[aluminum alloy\] \[zinc-5% aluminum mischmetal\] wire in a 2‑inch (50
mm) mesh and shall meet the requirements of \[ \].\]** **\[The fabric
shall be woven from a \[ \] gauge aluminum-coated steel wire in a 2-inch
(50 mm) mesh and shall conform to the requirements of ASTM A 491.\]**

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> **Galvanized steel fabric shall conform to the requirements of ASTM A
> 392, Class 2.**
>
> **Polyvinyl chloride‑coated steel shall conform to the requirements of
> ASTM F 668, Class 2b.**
>
> **Aluminum alloy fabric shall conform to the requirements of ASTM F
> 1183.**
>
> **Zinc-5% aluminum mischmetal alloy coated steel shall conform to the
> requirements of ASTM F 1345, Class 2.**
>
> **The Engineer shall specify 9 or 10 gauge aluminum-coated wire.**
>
> **Metallic-coated fabric shall have a clear acrylic coating applied to
> the selvage area after weaving.**

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**162‑2.2  BARBED WIRE.**  Barbed wire shall be 2‑strand 12‑1/2 gauge
**\[zinc‑coated\] \[aluminum‑coated\]** wire with 4‑point barbs and
shall conform to the requirements of **\[ \]**.

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> **Zinc‑coated barbed wire shall conform to the requirements of ASTM A
> 121, Class 3, Chain Link Fence Grade.**
>
> **Aluminum‑coated barbed wire shall conform to the requirements of
> ASTM A 121, Class II.**

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**162‑2.3  POSTS, RAILS AND BRACES.**  Line posts, rails, and braces
shall conform to the requirements of ASTM F-1043 or ASTM F 1083 as
follows:

\[Galvanized tubular steel pipe shall conform to the requirements of
Group IA, (Schedule 40) coatings conforming to Type A, or Group IC (
High Strength Pipe), External coating Type B, and internal coating Type
B or D.\]

\[Roll Formed Steel Shapes ( C-Sections) shall conform to the
requirements of Group IIA, and be galvanized in accordance with the
requirements of F 1043, Type A.\]

\[Hot-Rolled Shapes ( H Beams) shall meet the requirements of Group III,
and be galvanized in accordance with the requirements of F 1043, Type
A.\]

\[Aluminum Pipe shall conform to the requirements of Group IB.\]

\[Aluminum Shapes shall conform to the requirements of Group IIB.\]

\[Vinyl or polyester coated steel shall conform to the requirements of
ASTM F 1043, Paragraph 7.3 Optional Supplemental Color Coating.\]

\[Composite posts shall conform to the strength requirements of ASTM F
1043 or ASTM F 1083. The strength loss of composite posts shall not
exceed 10 percent when subjected to 3,600 hours of exposure to light and
water in accordance with ASTM G 23, ASTM G 26, and ASTM G-53.\]

Posts, rails, and braces furnished for use in conjunction with aluminum
alloy fabric shall be aluminum alloy or composite.

Posts, rails, and braces, with the exception of galvanized steel
conforming to F 1043 or ASTM F 1083, Group 1A, Type A, or aluminum
alloy, shall demonstrate the ability to withstand testing in salt spray
in accordance with ASTM B 117 as follows:

External: 1,000 hours with a maximum of 5% red rust.

Internal: 650 hours with a maximum of 5% red rust.

The dimensions of the posts, rails, and braces shall be in accordance
with Tables I through VI of Fed. Spec. RR‑F‑191/3.

**162-2.4 GATES.**  Gate frames shall consist of **\[galvanized steel
pipe\] \[polymer‑coated steel pipe\] \[aluminum alloy pipe\]**
**\[composite posts\]** and shall conform to the specifications for the
same material under paragraph 162‑2.3.  The fabric shall be of the same
type material as used in the fence.

**162-2.5 WIRE TIES AND TENSION WIRES.**  Wire ties for use in
conjunction with a given type of fabric shall be of the same material
and coating weight identified with the fabric type. Tension wire shall
be 7‑gauge marcelled steel wire with the same coating as the fabric type
and shall conform to ASTM A 824.

All material shall conform to Fed. Spec. RR‑F‑191/4.

**162-6 MISCELLANEOUS FITTINGS AND HARDWARE.**  Miscellaneous steel
fittings and hardware for use with **\[zinc‑coated\] \[aluminum‑coated\]
\[zinc-5% aluminum-mischmetal alloy-coated\]** steel fabric shall be of
commercial grade steel or better quality, wrought or cast as appropriate
to the article, and sufficient in strength to provide a balanced design
when used in conjunction with fabric posts, and wires of the quality
specified herein. **\[All steel fittings and hardware shall be protected
with a zinc coating applied in conformance with ASTM A 153.\]
\[Miscellaneous aluminum fittings for use with aluminum alloy fabric
shall be wrought or cast aluminum alloy.\]**  Barbed wire support arms
shall withstand a load of 250 pounds (113 kg) applied vertically to the
outermost end of the arm.

**162-2.7 CONCRETE.**  Concrete shall be of a commercial grade with a
minimum 28‑day compressive strength of 2500 psi (17 240 kPa).

**162-2.8 MARKING.**  Each roll of fabric shall carry a tag showing the
kind of base metal (steel, aluminum, or aluminum alloy number), kind of
coating, the gauge of the wire, the length of fencing in the roll, and
the name of the manufacturer.  Posts, wire, and other fittings shall be
identified as to manufacturer, kind of base metal (steel, aluminum, or
aluminum alloy number), and kind of coating.

CONSTRUCTION METHODS

**162-3.1 CLEARING FENCE LINE.**  All trees, brush, stumps, logs, and
other debris which would interfere with the proper construction of the
fence in the required location shall be removed a minimum width of 2
feet (61 cm) on each side of the fence centerline before starting
fencing operations.  The cost of removing and disposing of the material
shall not constitute a pay item and shall be considered incidental to
fence construction.

**162-3.2 INSTALLING POSTS.**  All posts shall be set in concrete at the
required dimension and depth and at the spacing shown on the plans.

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> **Posts should be spaced not more than 10 feet (3 m) apart and should
> be set a minimum of 36 inches (90 cm) in concrete footings.  If the
> frost depth is greater than 36 inches (90 cm), the posts should be set
> accordingly.  The posts holes shall be in proper alignment so that
> there is a minimum of 3 inches (75 mm) of concrete on all sides of the
> posts.**

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The concrete shall be thoroughly compacted around the posts by tamping
or vibrating and shall have a smooth finish slightly higher than the
ground and sloped to drain away from the posts.  All posts shall be set
plumb and to the required grade and alignment.  No materials shall be
installed on the posts, nor shall the posts be disturbed in any manner
within 7 days after the individual post footing is completed.

Should rock be encountered at a depth less than the planned footing
depth, a hole 2 inches (50 mm) larger than the greatest dimension of the
posts shall be drilled to a depth of 12 inches (300 mm).  After the
posts are set, the remainder of the drilled hole shall be filled with
grout, composed of one part Portland cement and two parts mortar sand. 
Any remaining space above the rock shall be filled with concrete in the
manner described above.

In lieu of drilling, the rock may be excavated to the required footing
depth.  No extra compensation shall be made for rock excavation.

**162-3.3 INSTALLING TOP RAILS.**  The top rail shall be continuous and
shall pass through the post tops.  The coupling used to join the top
rail lengths shall allow for expansion.

**162-3.4 INSTALLING BRACES.**  Horizontal brace rails, with diagonal
truss rods and turnbuckles, shall be installed at all terminal posts.

**162-3.5 INSTALLING FABRIC.**  The wire fabric shall be firmly attached
to the posts and braced in the manner shown on the plans.  All wire
shall be stretched taut and shall be installed to the required
elevations.  The fence shall generally follow the contour of the ground,
with the bottom of the fence fabric no less than 1 inch (25 mm) or more
than 4 inches (100 mm) from the ground surface.  Grading shall be
performed where necessary to provide a neat appearance.

At locations of small natural swales or drainage ditches and where it is
not practical to have the fence conform to the general contour of the
ground surface, longer posts may be used and multiple strands of barbed
wire stretched thereon to span the opening below the fence.  The
vertical clearance between strands of barbed wire shall be 6 inches (150
mm) or less.

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> **Openings below the fence may also be spanned with barbed wire
> fastened to stakes.**
>
> **The Engineer shall specify if tension wire is to be installed.**

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**162‑3.6  ELECTRICAL GROUNDS.**  Electrical grounds shall be
constructed **\[where a power line passes over the fence\] \[at 500‑foot
(150 m) intervals\]**.  **\[The ground shall be installed directly below
the point of crossing.\] ** The ground shall be accomplished with a
copper clad rod 8 feet (240 cm) long and a minimum of 5/8 inch (15 mm)
in diameter driven vertically until the top is 6 inches (150 mm) below
the ground surface.  A No. 6 solid copper conductor shall be clamped to
the rod and to the fence in such a manner that each element of the fence
is grounded.  Installation of ground rods shall not constitute a pay
item and shall be considered incidental to fence construction.

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> **The Engineer shall indicate the location of all electrical grounds
> on the plans. Grounding may not be necessary with the use of composite
> posts.**

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METHOD OF MEASUREMENT

**162‑4.1**   Chain‑link fence will be measured for payment by the
linear foot (meter).  Measurement will be along the top of the fence
from center to center of end posts, excluding the length occupied by
gate openings.

Gates will be measured as complete units.

BASIS OF PAYMENT

**162-5.1**  Payment for chain‑link fence will be made at the contract
unit price per linear foot (meter).

Payment for driveway or walkway gates will be made at the contract unit
price for each gate.

The price shall be full compensation for furnishing all materials, and
for all preparation, erection, and installation of these materials, and
for all labor equipment, tools, and incidentals necessary to complete
the item.

Payment will be made under:

> Item F‑162‑5.1 Chain‑Link Fence---per linear foot (meter)
>
> Item F‑162‑5.2 Driveway Gates---per each
>
> Item F‑162‑5.3 Walkway Gates---per each

MATERIAL REQUIREMENTS

> ASTM A 121 Zinc‑Coated (Galvanized) Steel Barbed Wire
>
> ASTM A 123 Zinc (Hot-Dip Galvanized) Coatings on Iron and Steel
> Products
>
> ASTM A 153 Zinc Coating (Hot‑Dip) on Iron and Steel Hardware
>
> ASTM A 392 Zinc‑Coated Steel Chain‑Link Fence Fabric
>
> ASTM A 491 Aluminum‑Coated Steel Chain‑Link Fence Fabric
>
> ASTM A 572 High‑Strength Low‑Alloy Columbium‑Vanadium Steels of
> Structural Steel Quality
>
> ASTM A 653 Specification for Steel Sheet, Zinc-Coated (Galvanized) or
> Zinc-Iron Alloy-Coated (Galvannealed) by the Hot-Dip Process
>
> ASTM A 824 Metallic-Coated Steel Marcelled Tension Wire for Use With
> Chain Link Fence
>
> ASTM A 1011 Steel Sheet and Strip, Hot-Rolled, Carbon, Structural,
> High-Strength Low-Alloy and High-Strength Low-Alloy with Improved
> Formability
>
> ASTM B 117 Standard Practice for Operating Salt Spray (Fog) Apparatus
>
> ASTM B 221 Aluminum and Aluminum‑Alloy Extruded Bars, Rods, Wire
> Shapes and Tubes
>
> ASTM B 429 Aluminum-Alloy Extruded Structural Pipe and Tube
>
> ASTM F 668 Poly(vinyl Chloride)(PVC) and other Organic Polymer-Coated
> Steel Chain-Link Fence Fabric
>
> ASTM F 1043 Strength and Protective Coatings on Metal Industrial Chain
> Link Fence Framework
>
> ASTM F 1083 Pipe, Steel, Hot-Dipped Zinc-coated (galvanized) Welded,
> for Fence Structures
>
> ASTM F 1183 Aluminum Alloy Chain Link Fence Fabric
>
> ASTM F 1345 Zinc-5% Aluminum-Mischmetal Alloy-Coated Steel Chain Link
> Fence Fabric
>
> ASTM G 152 Operating Open Flame (Carbon-Arc) Light Apparatus for
> Exposure of Nonmetallic Materials
>
> ASTM G 153 Operating Enclosed Carbon-Arc Light Apparatus for Exposure
> of Nonmetallic Materials
>
> ASTM G 154 Operating Fluorescent Light Apparatus for UV Exposure of
> Nonmetallic Materials
>
> ASTM G 155 Operating (Xenon- Arc) Light Apparatus for Exposure of
> Nonmetallic Materials
>
> FED SPEC Fencing, Wire and Post, Metal (Chain-Link Fence Posts, Top
> Rails and Braces)
>
> RR‑F‑191/3
>
> FED SPEC Fencing, Wire and Post, Metal (Chain-Link Fence Accessories)
>
> RR‑F‑191/4

END OF ITEM F-162

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