Specification 02831.doc

SECTION 02831

CHAIN-LINK FENCES AND GATES

1. Part 1 – GENERAL 1.01

SCOPE OF WORK

This work consists of furnishing all labor, equipment, and materials necessary to complete chain link fence and gate installation.

1.02

SUBMITTALS

Provide manufacturer’s catalog cuts with printed specifications. Manufacturer shall provide certification of compliance with material specifications. Actual samples of the material may be requested.

1.03 method of measurement

A. Measurement for Chain Link Fence will be the number of linear feet of fence completed, excluding gates, measured on slope length.

B. Measurement for Gates will be the number of gates installed.

1.04 Basis of Payment

A.

The quantities as measured above will be paid for at the contract unit price for each item as designated in the Schedule of Items. Such payments will be considered full compensation for completing this work in accordance with these specifications.

C. Payment will be made under:

PAY ITEM

DESCRIPTION

PAY UNIT

02831-1 Chain Link Fence Linear Foot

02831-2 4’ Wide Gate Each

02831-3 6’ Wide Gate Each

02831-4 10’ Wide Gate Each

2. Part 2 – PRODUCTS

2.01 Materials

A. Framework

1. Steel pipe conforming to Standard Specification ASTM F1043.

2. All coatings to be applied after welding.

3. Pipe shall be straight and true to section.

B. Fabric: Aluminized fabric shall be manufactured in accordance with ASTM A491 and coated before weaving with a minimum of 0.4 ounces of aluminum per square foot of surface area. The steel wire and coating shall conform to ASTM A817. Fabric to be 9 gauge woven in a 2” diamond mesh. Top selvage to be twisted and barbed. Bottom selvage to be knuckled.

Zinc-coated fabric shall be galvanized after weaving with a minimum 1.2 ounces of zinc per square foot of surface area and conform to ASTM A392, Class 1. Fabric to be 9 gauge woven in a 2” diamond mesh. Top selvage to be twisted and barbed. Bottom selvage to be knuckled.

2.02

CONCRETE MIX

Concrete conforming to ASTM C 94, having a minimum compressive strength of 3,000 PSI at 28 days.

2.03

COMPONENTS

C. Fence Posts

1. Line Posts: 2-3/8” O.D. 40 Wt.

2. Corner/End Posts: 2-7/8” O.D. 40 Wt.

D. Swing Gate Posts: 2-7/8” O.D. 40 Wt.

E. Rails and Braces: 1-5/8” O.D. 40 Wt.

F. Gates: Frame assembly of 1-5/8” O.D. 40 Wt. Pipe with welded joints. Weld areas repaired with zinc-rich coating applied per manufacturer’s directions. Fabric to match fence. Gate accessories, hinges, latches, center stops, keepers, and necessary hardware of quality required for industrial and commercial application. Latches shall permit padlocking.

G. Fittings:

1. Post Caps – Pressed steel, cast iron or cast aluminum alloy designed to fit snugly over posts to exclude moisture. Supply dome style caps for corner/end posts and loop type for line posts. All fittings to conform to ASTM F626.

2. Rail and Brace Ends – Pressed steel, cast iron, or cast aluminum alloy, cup-shaped to receive rail and brace ends.

3. Top Rail Sleeves – Tubular steel, 0.051 thickness x 7” long, expansion type.

4. Tension Bars – Steel strip, ¾” wide.

5. Truss Rods – Steel rod, 3/8” diameter merchant quality.

6. Barbed Wire Arms – Pressed steel, cast iron, or cast aluminum alloy fitted with clips or slots for attaching three strands of barbed wire. Arms shall be set outward on a 45 degree angle and be capable of supporting a 250 pound load at outer barbed wire connecting point without causing permanent deflection.

H. Tension Wire: Marcelled 7 gauge steel wire with minimum coating of 0.80 ounces of zinc or 0.40 ounces of aluminum per square foot of wire surface and conforming to ASTM A824.

I. Tie Wires: Aluminum, 9 gauge, alloy 1100-H4 or equal.

J. Hog Rings: Steel wire, 11 gauge, with a minimum zinc coating of 0.80 ounces per square foot of wire surface.

K. Barbed Wire: Commercial quality steel, 12-1/2 gauge, two strand twisted line wire with 4 point barbs at 5 inch spacing. Coating shall consist of a minimum of 0.80 ounces of zinc per square foot of wire surface conforming to ASTM A121 or a minimum of 0.30 ounces of aluminum per square foot of wire surface conforming to ASTM A585.

3. Part 3 – EXECUTION

3.01 Installation

A. Delivery, Storage, and Handling: Deliver material to the site in an undamaged condition. Carefully store material off the ground to provide proper protection against oxidation caused by ground moisture.

B. General: Installation to conform to ASTM F567.

C. Height: Provide height AS SHOWN ON THE DRAWINGS.

D. Post Spacing: Space line posts at intervals not exceeding ten feet measured parallel to the ground surface.

E. Post Setting: Set corner/end, gate, and line posts in holes, plumb and aligned as staked on the ground. Rod concrete into place in 12-inch maximum layers. Top of concrete footing to be 2” above grade and sloped to direct water away from posts. Do not apply any load to posts for at least 4 days after concrete has set. When drilling into solid rock is required to set a post, the post may be shortened, provided a minimum of 12 inches of post is grouted into the rock.

1. Corner Post Assemblies: Install at all points where the horizontal fence alignment changes 5 degrees or more.

2. Pull Post Assemblies: Install at maximum intervals of 200 feet and at all points where the vertical deflection angle of connecting reaches of wire is upward and exceeds 10 degrees.

F. Bracing: Brace gate and corner/end posts back to adjacent line posts with horizontal brace rails and diagonal truss rods.

G. Top Rail: Install through line loop caps connecting sections with sleeves to form a continuous rail.

H. Top Tension Wire: When top rail is omitted, stretch tension wire through loop caps and fasten to corner/end posts.

I. Bottom Tension Wire: Stretch between corner/end posts 6” above grade and fasten to outside of line posts with tie wires.

J. Fabric: Pull fabric taut with bottom selvage 2” above grade. Fasten to corner/end posts with tension bars threaded through mesh and secured with tension bands at maximum 15” intervals. Tie to line posts and top rails with tie wires spaced a maximum of 12” on posts and 24” on rails. Attach to bottom tension wire with top rings at maximum 24” intervals.

K. Barbed Wire: Anchor to corner/end extension arms, pull taut and firmly install in slots of line post extension arms.

L. Gates: Install gates plumb, level, and secure for full opening without interference. Anchor center stops and keepers in concrete.

M. Fasteners: Install nuts for fittings, bands, and hardware bolts on inside of fence.

3.02

COMPLETION

The area of installation shall be left free of debris caused by the installation of the fence.

END OF SECTION

WATER TANK SECURITY FENCING

DIVISION 2

Section 02831 - 1

ANGELES NATIONAL FOREST