Specifications include, but are not limited to: Concrete: ASTM C 94, 2500 psi compressive strength at 28 days, using 3/4-inch maximum size aggregate. Site mixed concrete will be acceptable. Grout shall consist of one part cement to three parts clean, well-graded sand, and the minimum amount of water required to produce a workable mix. Fabric: Comply with Fed. Spec. RR-F-191/1, helically woven into a diamond mesh. Steel Wire: Unless otherwise specified, provide steel wire for the fabric of such quality and purity that, when drawn to the wire gage size specified, the wire shall have a minimum tensile strength of 75,000 pounds per square inch when tested in accordance with ASTM A 370. Type I, Zinc-Coated Steel Wire: Unless otherwise specified, provide a minimum weight of coating on the wire of 2 ounces of zinc per square foot of coated surface area when determined in accordance with ASTM A 90. Mesh Size: 2 inch 9 gage Selvage: Twisted and barbed at both selvages, except on fabric with 1-inch mesh. Fabric Height: As indicated. Fabric Length: Unless otherwise specified, the standard length of fabric roll shall be 50 linear feet +1 percent as determined by Fed. Spec. RR-F-191/1. Each roll of fabric shall be a one-piece length.