710.01 710-1 SECTION 710 FENCE AND GUARDRAIL
710.01 Barbed Wire. Steel barbed wire shall confor m to the requirements of ASTM A121, Class
I.Aluminum barbed wire shall be manufactured per ASTM B 211 with alloy 5052- O for the line wire and alloy 5052 -H38 for the barbs.
710.02 Woven Wire. Woven wire shall conform to the details and requirements shown on the
plans and to the following: Zinc coated steel woven wire shall confor m to the requirements of ASTM A 116, coating Class I. Aluminum coated steel woven wire shall confor m to the requirements of ASTM A 116, Type A. Fittings and attachments shall be zinc coated to conform to the requirements of AASHTO M 232.
710.03 Chain 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 A 392, Class I; and aluminum coating for steel fabric to ASTM A 491, Class I.
710.04 Snow Fence . Wire -bound picket fence shall confor m to the requirements of ASTM F 537.
Posts shall conform to the requirements of AASHTO M 281.
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- 2 710.06 Timber 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 select ed 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.
1.Posts. WWPA or WCLIB posts and timbers, No. 1 or better; or SPIB timbers No. 2SR or better.
2.Rails. WWPA, WCLIB, or SPIB: Light framing, standard or better; or structural joists and planks, No. 2 or better.
3.Boards. WWPA No. 2 common or better; or SPIB No. 1 or better.
4.Treatment. The selected species shall be pressure treated lumber conforming in all 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.
5.Preservative. AASHTO M -133. 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.
710.07 Fence 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. 710.08 710-3 710.08 Guardrail 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.
a.Wood posts shall be fabricated from an approved or specified timber species and shall be of 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 .
b.Steel posts shall be of the section and length as specified or as shown in the Contract. Steel 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.
c.Concrete deadmen for end anchorages shall be as specified or as shown in the Contract.
710.09 Guardrail 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 ex ceed the requirements of ASTM A 307. Where high strength bolts are required, they shall conform to the requirements of AS TM F3125 Grade A325. 710.09 710- 4 THIS PAGE INTENTIONALLY LEFT BLANK 711.01 711-1 SECTION 711 CONCRETE CURING MATERIALS AND ADMIXTURES
711.01 Curing Materials . Curing materials shall conform to the following requirements:
Burlap Cloth made from Jute or Kenaf AASHTO M 182 Liquid Membrane -Forming Compounds for Curing Concrete ASTM C309 Sheet Materials for Curing Concrete AASHTO M 171* *Only the performance requirements of AASHTO M171 shall apply. Straw used for curing shall consist of threshed straw of oats, barley, wheat, or rye. Clean field or marsh hay may be substituted for straw when approved by the Engineer . Old dry straw or hay that breaks readily in the spreading process will not be accepted.
711.02 Air-Entraining Admixtures . Air-entraining admixtures shall conform to the
requirements of AASHTO M 154. Admixtures that have been frozen will be rejected per subsections 106.08 and 106.09.
711.03 Chemical Admixtures. Chemical admixtures for concrete shall conform to the
requirements of AASHTO M 194. Admixtures that have been frozen will be rejected. Corrosion inhibiting admixtures shall conform to the requirements of ASTM C1582. Pigments for integrally coloring concrete shall conform to the requirements of ASTM C979.
Source: Colorado Standard Specifications for Road and Bridge Construction, 2023 Edition. Pages 869–872 of 943.