Item F-162 Chain-Link Fences/DescriptionITEM F-162 CHAIN -LINK FENCES!
DESCRIPTION
162- .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.
1 -2.1 FABRIC. The fabric shall be woven with a 9-gauge galvanized steel wire in a 2--inch (50 mm)
mesh and shall meet the requirement of ASTMA 392, Class 2.
162-2,2BARBED WIRE. Barbed wire shall be 3-strand 12- I/2 gauge zinc -coated wire with 4-point
barbs and shall conform to the requirement OSF ASTMA 122q, Class 3, chain link fence grade.
162-2.3 POST, RAI.LS AND BRACES. Posts, rails, and braces furnished for use in conjunction with
zinc -coated steel or zinc/polymer steel.
1....ine posts, rails, and braces shall be galvanized steel pipe or zinc/polymer-coated steel pipe. Galvanized
steel pipe shall conform to the requirements of ASTMF 1083.
162-2.GATES: Gate frames shall consist of galvanized steel pipe or polymer -coated steel pipe and
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 I E . wire fabric 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 and shall
conform to ASTM A 824.
All material shall conform to Fed. Spec. RR-F--19114.
162-6 MISCELLANEOUSFITTINGS AND A . E. Miscellaneous steel fittings and
hardware for use with zinc -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. Barbed wire
support arms shall withstand a load of 250 pounds (113 leg) applied vertically to the outermost end of the
arm.
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1 2-2.7 CONCRETE. Concrete shall be in accordance with 3,000 psi sidewalks.
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 gage 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, aluminuml or aluminum alloy number), and kind of coating.
12-3.1 CLEARING FENCE LINES All trees, brush, stumps, logs, and other debris which would
interfere with the propr construction of the fence in the required location shall be removed a minimum
width of 2 feet (61 cps) 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. owner will coordinate with contractor and stake corners.
162--3.2 INSTALLING POST . All posts shall be set in concrete at the required dimension and depth
and at the spacing shown on the plans.
Post should be spaced not more than 10 feet (3m) apart and should be set a minimum of 36 inches (90cm)
in concrete footings. If the frost depth is greater than 36 inches (75mm) of concrete on all sides of the
posts.
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 (50mm) larger
than the greatest dimension of the posts shall be drilled to a depth of 12 inches (300mm). 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
planner 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.
1 2-3.4 INSTALLING BRA ES. Horizontal brace rails, with diagonal truss rods and turnbuckles,
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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 925mmj or more than 4 inches (I 00mm) 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 (150mm) or less.
Openings below the fence may also be spanned with barbed wire fastened to stapes.
If tension wire is required, it will be indicated on the plans.
Page 3 of 5
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