Specifications_for_Chain_Link_Fence.rtf

Chain Link Fence

A. General

1. The contractor shall install approximately 120 feet of 6 foot high chain link fence with 3 strands of barbed wire on top, as shown on the fence installation plan (from point A to B). The installation shall result in complete fencing of the remaining compound. The new installation materials shall match that of the existing fencing. The contractor shall also repair existing slide gate to make it easier to open.

B. Materials

1. Fabric

Fabric shall be chain line fabric of 9 ga. (finished wire size), 2-inch aluminized or galvanized steel mesh meeting AASHTO M-181-90.

b. Wire shall have a minimum breaking strength of 1,290 lbs per foot. Fenced enclosure shall be 6 feet in height and have twisted and barbed finish at both top and bottom selvages.

c. Tension wire shall be 7 gage, galvanized wire.

2. Galvanizing

All fence/gate materials shall be hot-dip galvanized after fabrication, weaving, or welding is complete in accordance with ASTM A392, Class II.

Castings and hardware shall be galvanized in accordance with ASTM A153.

c. All fabric, posts, and bracing shall have 2.0 oz. per square foot zinc coating.

3. End, corner, and gate posts shall be welded or seamless steel galvanized pipe conforming to the requirements of ASTM F1083, Schedule 40 (or equal), 3 inches O.D., weight 5.79 pounds per linear foot.

4. Line posts shall be round galvanized steel pipe conforming to the requirements of ASTM A53, Schedule 40 (or equal), 2 ½ inches O.D., weight 3.65 pounds per linear foot.

5. Top rail and braces shall be welded or seamless steel galvanized pipe conforming to the requirements of ASTM A53, Schedule 40., 1 5/8 inches O.D., weight 2.27 pounds per linear foot.

Tension wire shall be spiralled or crimped #7 gage (0.177) inches in diameter, conforming to ASTM A-824.

8. Fabric ties shall be No. 9 gauge aluminum wire.

9. Clamps and bands, top or brace rail clips, and stretcher bar bands are to be made of heavy stampings of the latest approved type, hot zinc coated, inclinable beveled edge type 3/8" diameter square shouldered aluminum carriage bolts, non-removable type.

10. Fabric bands are to be No. 6 gauge aluminum alloy of new improved self-taping design, eliminating unsightly buckles.

11. Supporting arms for barbed wire shall be set at an angle of 45 degrees facing toward the center and shall be fitted with clips or other means for attaching 3 strands of barbed wire. The top wire shall be 12 inches horizontally from the fence line and the other wires space uniformly between the top of the fence fabric and the outside strand. Barbed wire arm shall be on each line post, and gate post and shall be of sufficient strength to withstand a weight of 250 lbs. applied at the outer strange of barbed wire.

12. Barbed wire shall be in accordance with ASTM A121 Class 3 coating weight, 0.099 inch strand and 0.086 inch barbs (round), 4 points on 5 inch spacing.

13. Swing gates shall conform to ASTM F 900. The base materials of the gate frame shall be round members, schedule 40, 1 5/8 inches O.D., weight 2.27 pounds per linear foot, and welded at all corners or assembled with corner fittings. Gates assembled with corner fittings shall have adjustable truss rods 5/16 in. min. diameter on panels 5 ft. wide or wider. Truss rods shall be the same base metal and finish as the gate frames. Gate leaves shall have vertical interior bracing at maximum intervals of 8 ft. and shall have a horizontal interior member if the fabric height is 8 feet or more. Gate fabric shall be the same type as used in fence construction. Gate frame shall be designed and built at a width so that the outer members shall not sag in excess of the lesser of 1% of the gate leaf width or 2 in. Size of gate shall be measured from inside face to inside face of gate posts.

14. Shop Fabrication

C. Execution

3. Posts to be spaced in line of fence not farther apart than ten (10) foot centers.

All holes shall be approved by the C.O.R. prior to placing posts and concrete.

Install 3 parallel runs of barbed wire on each extension arm. Wire shall be tight.

Shop Drawings, Products Data & Samples

General

The contractor shall submit 3 copies descriptive literature of the proposed fence material for review and approval.