485 ALASKA 2020 SECTION 709 REINFORCING STEEL AND WIRE ROPE
709-2.01 Reinforcing Steel.
1.Reinforcing Steel Bars . Furnish deformed reinforcing steel bars of the type, grade, and size as specified. For steel reinforcing bars used in bridge structures, use bars meeting ASTM A706, Grade 60. For all other structures, use bars meeting AASHTO M 31, Grade 60.
2.Headed Reinforcing Steel Bars . Furnish headed reinforcing steel bars meeting the requirements of ASTM A970, Class HA. Use reinforcing steel meeting Section 709- 2.01.1 unless otherwise noted.
3.Epoxy -Coated Reinforcing Steel Bars . Furnish epoxy -coated steel bars meeting the requirements of ASTM A775. Coat epoxy -coated reinforcing steel in an epoxy coating applicator plant certified in accordance with the Concrete Reinforcing Steel Institute (CRSI) Voluntary Certification Program. Use reinforcing steel meeting Section 709- 2.01.1 unless otherwise noted.
4.Steel Wire . Furnish plain steel wire of the size specified that meets the requirements of AASHTO M 32.
5.Steel Bar Mats . Furnish deformed steel bar mats of the type, grade, size, and spacing as specified. Unless otherwise noted, furnish steel bar mats meeting the requirements of AASHTO M 54, Grade 60.
6.Steel Welded Wire Fabric . Furnish plain steel welded wire fabric of the size and spacing specified that meets the requirements of AASHTO M 55.
7.Epoxy -Coating Patch Material . Furnish epoxy -coating patch material meeting the requirements of ASTM D3963.
8.Certification. Furnish a Certified Test Report from the manufacturer or an independent testing laborator y containing a list of dimensional, chemical, metallurgical, electrical, physical, and other required test results of the specified material certifying that the product or assembly has passed all specified tests. Include the following:
a.the project name and number;
b.the manufacturer's name;
c.the name of the product or assembly;
d.a complete description of the material;
e.country of origin;
f.the lot, heat, or batch number that identifies the material;
g.all required test results for the specified material from the sam e lot, heat, or batch defined in Subsection 709- 2.01.8.f; and,
h.a statement, signed by a person having legal authority to act for the manufacturer or the independent testing laboratory, that the test results show that the product or assembly to be incorpora ted into the project has been sampled and tested and the samples have passed all specified tests. 486 ALASKA 2020 Tag, stencil, stamp, or otherwise mark all materials or assemblies furnished under certification to the project with the lot number, heat number, batch number , or other appropriate identification, which can be readily recognized and legible, and is identical to the accompanying Certified Test Report.
709-2.02 WIRE ROPE O R WIRE CABLE. Meeting AASHTO M 30, 3/4 inch Type 1, Class A.
709-2.03 Bar Support S.
1.Precas t Mortar Blocks . Provide mortar blocks meeting the following:
a.Ensure the mortar blocks have compressive strength at least equal to the strength of the concrete in which the mortar blocks are embedded. Sample and test the mortar for compressive strength acc ording to AASHTO T 106. Each test will be considered to represent no more than 2,500 mortar blocks made of the same mortar and cured under the same conditions.
b.Ensure the bearing area of the mortar block is less than 2 inches in each dimension.
c.Secure to the reinforcing steel with either a grooved top that will hold the bar in place or a protruding embedded wire that is tied to the reinforcing steel.
2.Metal Supports . Provide metal supports meeting at least one of the following:
a.Galvanized after fabrication according to AASHTO M 232 Class D,
b.Stainless steel meeting the requirements of ASTM A493, Type 302, or
c.Plastic coated using coatings that do not react chemically with the concrete, have a minimum thickness of 3/32 inch where the support touches the form, do not crack at or above -5°F, and do not deform enough to expose the metal at or below 200°F.
3.Plastic Supports . Provide plastic supports meeting the following:
a.Non- porous.
b.Chemically inert in concrete.
c.Have rounded seats.
d.Do not deform under load during normal temperatures.
e.Do not shatter or crack under impact loading in cold weather.
f.Have at least 25 percent of their gross area perforated. Do not use plastic supports that prevent complete concrete consolidation in and around the support or require supports less than 1 foot apart along the length of the bar. 487 ALASKA 2020 SECTION 710 FENCE AND GUARDRAIL
710-2.01 BARBED WIRE . Meet AASHTO M 280, 12.5 gage wire, with 4- point round 14- gage
barbs, spaced at 5 inches, Class 1 coating.
710-2.02 WOVEN WIRE. Meet AASHTO M 279, Grade 60, Class 1 coating.
710-2.03 CHAIN LINK FABRIC. Meet AASHTO M 181, Type I (Class C or D coating), Type II, or
Type III, including fittings and hardware. Use 9- gage fabric wire, 2- inch mesh.
710-2.04 Metal Beam Rail.
1.W-Beam and Thrie Beam Guardrail. Meet AASHTO M 180, Class A, Type II.
2.Box-Beam Guardrail. Meet:
a.ASTM A500 Grade B , or
b.ASTM A501. Galvanize the rail per AASHTO M 111 after fabrication.
710-2.05 FENCE POSTS. Meet AASHTO M 181, Grade 1 or Grade 2, including rails and braces.
710-2.06 GUARDRAIL POSTS AN D BLOCKOUTS . Furnish posts and blockouts, as specified,
meeting the following requirements.
1.Wood Posts and Blockouts . Use timber with a stress grade of 1200 psi or more. Testing must meet the standards of the West Coast Lumber Inspecti on Bureau. Use timber for posts and blockouts that is either rough sawn (unplaned) or S4S with nominal dimensions indicated. Allowable size tolerance of rough sawn blockouts in the direction of the bolt holes is ±1/4 inch. Only one combination of post and blockout finish may be used for any one continuous length of guardrail. Treat all timber to meet Section 714.
2.Steel Posts and Blockouts . Meet the section and length specified or shown on the Plans. Use copper bearing steel when so specified. Use steel meet ing the requirements of ASTM A36 and galvanized per ASTM A123/A.
3.Synthetic Blockouts . Products made from alternate materials may be used if accepted by the FHWA for use on the National Highway System.
710-2.07 GUARDRAIL H ARDWARE. Meet AASHTO M 180. Galvan ize after fabrication fittings,
bolts, washers, and accessories meeting AASHTO M 111 or AASHTO M 232, whichever applies. Guardrail cable anchor assembly must conform to TF13 Guide to Standardized Roadside Hardware, designator FCA01, with the cable meeting AASHTO M 30, Type II, Class A.
710-2.08 WIRE MESH. Galvanized 2- inch mesh (poultry netting), 20 gage wire.
710-2.09 ANCHOR WIRE . Galvanized 9 gage steel wire.
710-2.10 PIPE COUPLI NGS. Galvanized nonrecessed, taper tapped, extra heavy couplings.
710-2.11 GUARDRAIL TERMINALS. W-beam shall meet requirements of AASHTO M 180,
Class A, Type II. Galvanize after fabrication. Components made from rolled pressed and forged shapes, castings, plates, bars, and strips shall meet the coating requirements of AASHTO M 111. Galvanize after fabrication.
Source: Alaska Standard Specifications for Highway Construction, 2020 Edition. Pages 513–514 of 584.