Fence and Guardrail
710.01Barbed Wire. Steel barbed wire shall conform to the requirements of ASTM A121, Class
wire and alloy 5052-H38 for the barbs.
710.02Woven Wire. Woven wire shall conform to the details and requirements shown on the
plans and to the following: Zinc coated steel woven wire shall conform to the requirements of ASTM A116, coating Class I. Aluminum coated steel woven wire shall conform to the requirements of ASTM A116, Type A. Fittings and attachments shall be zinc coated to conform to the requirements of AASHTO M 232.
710.03Chain Link Fabric. Chain link fabric and required fittings and hardware shall conform
to the requirements of AASHTO M 181 for the kind of metal, sizes of wire and mesh specified. Zinc coating for steel fabric shall conform to ASTM A392, Class I; and aluminum coating for steel fabric to ASTM A491, Class I.
710.04Snow Fence. Wire-bound picket fence shall conform to the requirements of ASTM F537
Posts shall conform to the requirements of AASHTO M281.
710.05“W” Beam Rail. The rail elements shall be corrugated sheet steel beams conforming to
the requirements of AASHTO M 180 of the designated class and type. The beams shall be galvanized, shop painted or corrosion resistant as may be specified. The same requirements shall apply to metal offset devices. Corrosion resistant steel for rail elements and terminals shall not be painted or galvanized. Corrosion resistant beam rails shall consist of corrugated sheet steel conforming to the requirements of AASHTO M 180, Type IV and shall have a corrosion resistance of at least 4 times that of carbon steel without copper (0.02 Max), or twice that of carbon steel with copper. The sheet steel may either be in coils or cut lengths when processed for corrugation. All corrosion resistant material shall be sandblasted to provide a uniform weathered appearance. All corrosion resistant steel parts shall be handled with care to avoid gouges, scratches, or dents. Care shall be exercised to keep foreign material such as paint, grease, oil, or crayon, from contact with the surface. Steel parts either damaged physically or by contact with foreign substances, will not be accepted. During shipment or site storage, corrosion resistant steel parts must be positioned to allow free drainage and air circulation on the surfaces. Natural oxide formation on the steel may occur and will not be considered objectionable.
The Contractor shall furnish three copies of a certified mill test report to the Engineer. This report shall show the results of physical and chemical tests of the metal and its coating.
710.06
710.06Timber for Wood Noise Barrier. Timber shall be any of the timber species given in
subsection 508.02 including all species defined as “Native.” Throughout the project, posts shall be of one species; boards may be of another species; and rails may be a mix of any permissible species, except where single sided fence is built, the rails shall be of one species. The exposed board surfaces shall be of one finish throughout the entire fence and may be rough sawn, SIS, S1S2E, or S48; posts and rails may have any of the finishes. Species selected for posts, rails, and boards shall conform to the grading rules of the Western Wood Products Association (WWPA), the Southern Pine Inspection Bureau (SPIB), or the West Coast Lumber Inspection Bureau (WCLIB) for grading and strength.
better.
planks, No. 2 or better.
respects to the AWPA Standard U1, Commodity Specification A: Sawn Products and AWPA Commodity Standard B: Posts (Ground contact for posts, above ground for balance of fence). A treatment report is required from the treatment plant.
All lumber shall be manufactured per Product Standard 20-70 as published by the Department of Commerce and shall be grade marked by a grading agency or have an accompanying certificate from the grading agency. The grading agency shall be certified by the Board of Review of the American Lumber Standards Committee. All posts, rails, and fence board materials shall be dried after treatment to a maximum of 19 percent moisture content.
710.07Fence Posts. Wood posts shall conform to the details and dimensions indicated on
the plans. Wood posts shall be straight, sound, and seasoned with ends sawed off square or as indicated. All knots shall be trimmed flush with the surface. Wood posts shall be peeled and shall be treated with preservative per AASHTO M 133 or AWPA Standards. When native cedar posts are called for on the plans, the requirements for peeling and for treating may be omitted.
All dimension timber and lumber required for fences or gates shall be sound, straight, and free from knots, splits, and shakes. It shall be of the species and grades indicated on the plans. Concrete posts shall be made of concrete of the class specified and shall contain steel reinforcement as shown on the plans. Steel posts shall be galvanized per AASHTO M 111. Fittings, hardware and other appurtenances not specifically covered by the Contract shall be standard commercial grade, and in accord with current standard practice. Pipe or roll-formed steel material for fence posts shall conform to the requirements shown on the plans and to the requirements of Class 1 Pipe, Grade A and Grade B or Class 3 Formed Steel Sections, of Federal Specification RR-F- 191/3E. Pipe material for fence posts shall conform to the requirements shown on the plans and to the requirements of Class 1 Pipe, Grade A or Grade B, of Federal Specification RR-F- 191/3C.
710.08
710.08Guardrail Posts. Posts shall be of either wood or steel. When the choice of post is at
the option of the Contractor, there shall be only one kind furnished on the project unless otherwise specified in the Contract.
the quality, diameter or section, and length as specified or as shown in the Contract. Treated posts shall be fabricated or framed before treatment and shall conform to the requirements of AASHTO M 133 or AWPA Standards.
shall conform to the requirements of AASHTO M 183 for the grade specified. The posts shall be galvanized or corrosion resistant as may be specified. All corrosion resistant material shall conform to the requirements of AASHTO M 222.
710.09Guardrail Hardware. Splices, end connections, end anchor rods, and accessories shall
be as specified or as shown in the Contract. Bolts, nuts, and washers shall be galvanized per AASHTO M 232, Class C, or AASHTO M 298, Class 50, Type 1. All other fittings shall be galvanized per AASHTO M 111. Bolts, nuts, and washers for corrosion resistant guardrail shall be of corrosion resistant material and conform to or exceed the requirements of ASTM A307. Where high strength bolts are required, they shall conform to the requirements of ASTM F3125 Grade A325.
710.09
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