Section 710 — Fencing and Mesh Fabrics

710.01Barbed Wire. Provide galvanized wire or aluminum coated wire conforming to AASHTO M 280.

710.02Smooth Wire. Provide smooth wire conforming to ASTM A854.

710.03Woven Wire. Provide galvanized fabric or aluminum coated fabric conforming to AASHTO M 279. 710.04 Chain Link Fence. Provide fabric, posts, rails, ties, bands, bars, rods and other fittings, and hardware conforming to AASHTO M 181. Provide 0.177-inch coiled spring steel tension wire conforming to ASTM A641 hard temper with a Class 3 galvanized coating. Use the same coating on the tension wire as used o n the rest of the chain link fence.

710.05Fence Posts and Bollards.

(a)Wood. Conform to AASHTO M 168. Peel bark, except for red cedar posts and bracing, which do not require peeling. Trim knots flush with the surface and season the wood. For dimension lumber for fences, bollards, or gate posts, use timber that is sound, straight, and reasonably without knots, splits, and shakes. Provide S4S finish.

(b)Steel. Conform to AASHTO M 281, except that chain link fence conforms to AASHTO M 181.

710.06Sp lit Rail. Conform to ASTM F537.

710.07Fence Gates. For frame gates using chain link fabric, conform to AASHTO M 181. Use the same chain link fabric in the gate as in the fence.

710.08Temporary Plastic Fence. Provide plastic noncorrosive fence fabricat ed from polyethylene and UV stabilized for outdoor weathering. Conform to the following:

(a)Height 48 in minimum

(b)Mesh openings 3.15 to 3.35 in

(c)Color International orange

(d)Mass 0.16 lb/ft minimum

710.09Draped Rockfall Protection Fabric.

(a)Double -twist wire mesh. Provide 8x10 double- twist, hexagonal wire mesh conforming to ASTM A975, Style 1. (b) High tensile strength steel wire mesh. Provide a homogenous high tensile strength steel wire mesh consisting of one wire type with a minimum tensile strength exceeding 250,000 pounds per square inch with a zinc and aluminum galvanizing applied at a minimum weight of 0.025 ounces per square feet. Provide a mesh with a minimum tensile strength of 10.0 kips per foot.

(c)Wire mesh fastener. Provide wire mesh fa steners specified by the wire mesh manufacturer.

(d)Cable net with wire mesh backing.

(1)Cable net panels. Provide net panels that are constructed from either a 1x3 high tensile steel wire spiral rope or a 7x19 galvanized aircraft cable (GAC), EIP steel with a minimum nominal diameter of 5/16 inch and breaking strength of at least 9800 pounds. Use net panels with a grid size opening no larger than 12 inches by 12 inches or with a diamond in-circle diameter less than 10 inches. For the net panels made with GAC wire rope, provide wire rope conforming to Federal Specification RR-W-410 and ASTM A1023.

(2)Wire mesh backing. Provide one of the following mesh fabrics for use as the wire mesh backing attached to the cable net wire panels:

(a)8x10 double- twist, hexagonal wire mesh conforming to ASTM A975, Style 1;

(b)Galvanized wire mesh consisting of No. 9 gauge (0.148- inch diameter) commercial quality steel wire, 3½ inches by 5½ inches diamond mesh chain link conforming to AASHTO M 181. Galvanize the wire accordin g to ASTM A392, Class 1. Galvanize wire before weaving. Provide a wire mesh fabric with knuckled selvages; or

(c)Homogenous high tensile strength steel wire mesh consisting of one type of wire. Provide a mesh with wires with a minimum diameter of 0.079 inch, minimum tensile strength of 250,000 pounds per square inch, and a zinc and aluminum coating applied at a minimum weight of 0.40 ounce per square feet. Provide a mesh with a longitudinal minimum tensile strength of 3.6 kips per foot, and a mesh diamond in-circle diameter no larger than 4 inches.

(e)Lacing and seaming wire rope . Conform to Subsection 709.03.

710.10Midslope Rockfall Attenuator Materials.

(a)Fence post columns. Provide columns fabricated from wide flange structural members conforming to ASTM A992 or AASHTO M 270, Grade 50 or 50S and galvanized following fabrication according to AASHTO M 111 or ASTM A123. Provide bars or plates welded to steel posts conforming to ASTM A572 Grade 50 or AASHTO M 270, Grade 50 and galvani zed after fabrication according to AASHTO M 111 or ASTM A123.

(b)Attenuator net panels. Conform to Subsection 710.09(d)(1) .

(c)Steel post foundation. Provide #3 diameter and #4 deformed, Grade 60 bars conforming to AASHTO M 31 or AAS HTO M 322 as reinforcing steel bars for the concrete foundations.

(d)Wire mesh backing. Provide one of the following mesh fabrics for use as the wire mesh attached to the attenuator net panels:

(1)Double -twist wire mesh. Provide 8x10 double -twist, hexagonal wire mesh conforming to ASTM A975, Style 1; or 814 (2) High tensile strength steel wire mesh. Provide a homogenous high tensile strength steel wire mesh consisting of one type of wire. Provide a mesh with wires with a minimum diameter of 0.079 inch, mini mum tensile strength of 250,000 pounds per square inch, and a zinc and aluminum coating applied at a minimum weight of 0.40 ounce per square feet. Provide a mesh with a longitudinal minimum tensile strength of 3.6 kips per foot, and a mesh diamond in-circle diameter no larger than 4 inches .

(e)Wire mesh fastener. Conform to Subsection 710.09(c) .

(f)Lacing and seaming wire rope . Conform to Subsection 709.03.