Section 715.-PILING 715.01 Untreated Timber Piles. Untreated timber piles shall conform to AASHTO M 168. 715.02 Treated Timber Piles. Unless otherwise specified, treated timber piling shall be either Douglas fir, larch, southern yellow pine, Norway pine, or red oak conforming to AASHTO M 168 and AASHTO M 133 and shall be treated with the preservative called for in the bid schedule by the pressure method prescribed in AWPA Standard C1 in accordance with requirements shown on the plans or in the special provisions. Marine piles for use in salt water shall be Douglas fir or southern pine treated with creosote in accordance with AWPA Standard C1 and C3. 715.03 Concrete Piles. Concrete shall conform to section 552. Unless otherwise shown on the plans, the concrete shall be class A. Billet steel and rail steel reinforcement bars shall conform to section 709.01. Prestressing reinforcement steel shall conform to subsection 709.03. 715.04 Steel Shells. (a) Shells driven without a mandrel-Unless otherwise called for on the plans or in the special provisions, shells for cast-in-place concrete piles shall have a minimum 12" (304.8 mm) diameter at cutoff and a minimum 8" (203.2 mm) diameter tip; made from not less than 7 gage (0.1792 inches (4.5517 mm) in thickness) plate stock conforming to AASHTO M 183 (ASTM A 36). Shells may be either spirally welded or longitudinally welded and may be either tapered or constant in section. Tips shall be sealed as noted on the plans. (b) Shells driven with a mandrel-The shell shall be of sufficient strength and thickness to withstand driving without injury and to resist harmful distortion and/or buckling due to soil pressure after being driven and the mandrel removed. Butt and tip dimensions shall be as called for on the plans or as set forth in the special provisions. 715.05 Steel Pipes. (a) Filled steel pipe to be filled with concrete shall conform to the requirements of ASTM A 252, grade 2. Closure plates for closed end piles shall conform to the requirements of AASHTO M 183 (ASTM A 36). (b) Unfilled Tubular Steel Piles. Unfilled Tubular Steel Piles shall conform to the requirements of Welded and Seamless Steel Pipe Piles ASTM A252, Grade 2, with Chemical Requirements meeting ASTM Designation A53, Grade B. The wall thickness shall not be less than 1 inch (4.762 mm). 715.06 Steel H-Piles. Steel H-Piles shall be rolled steel sections of the weight and shape called for on the plans. They shall be structural steel meeting the requirements of AASHTO M 183 (ASTM A36), provided that where the special provisions call for copper-bearing structural steel, the steel shall contain not less than 0.20 percent nor more than 0.35 percent of copper, except that steel manufactured by the acid-bessemer process shall not be used. 715.07 Sheet Piles. Steel sheet piles shall meet the requirements of AASHTO M 202 (ASTM A 328), or AASHTO M 223 (ASTM A 572). All other sheet piles shall meet the requirements prescribed above for the particular material specified. The joints shall be practically watertight when the piles are in place. 715.08 Pile Shoes. Pile shoes shall be as called for on the plans. Section 716.-MATERIAL FOR TIMBER 716.01 Structural Timber and Lumber. Structural timber, lumber, and piling shall conform to the requirements of AASHTO M 168. No boxed heart pieces of Douglas fir or redwood shall be used in outside stringers, floor beams, caps, posts, sills, or rail posts. Boxed heart pieces are defined as timber so sawed that at any point in the length of a sawed piece the pith lies entirely inside the four faces. Yard lumber shall be of the kinds and grade called for on the plans. Round poles and posts shall be of the kinds indicated on the plans. 716.02 Hardware. Machine bolts, driftbolts, and dowels may be medium steel. Washers shall be cast ogee gray iron castings or malleable castings, unless washers cut from medium steel indicated on the plans. Bolts shall have square heads and nuts, unless otherwise stipulated. Nails shall be cut or round nails, of standard form. Spikes shall be cut or round spikes or boat spikes, as specified. All hardware shall be galvanized in conformity with AASHTO M 232 (ASTM A 153) or cadmium plated in conformity with ASTM A 165, type OS. Ring or shear plate timber connectors shall be of approved design conforming to the requirements of article 2.20.1. (F), AASHTO "Standard Specifications for Highway Bridges." 716.03 Treated Timber. Structural timber, lumber, and piling to be treated shall conform to the requirements of AASHTO M 168 and M 133. The type of treatment to be used will be shown on the plans or in the special provisions and shall conform to the applicable requirements of AWPA Standard C1 and C14. Section 717.-STRUCTURAL METAL 717.01 Structural Steels. Structural steel shall conform to the requirements indicated: 717.02 Bolts and Nuts. Bolts and nuts shall conform to the requirements of ASTM A 307 Grade A, with hexagonal heads and nuts, for steel machine bolts and nuts and tap bolts. 717.03 High Tensile Strength Bolts. (a) Heat treated carbon steel bolts. Bolt, nut and washer material shall conform to AASHTO M 164 (ASTM A 325) for high-strength bolts for structural steel joints, including suitable nuts and plain hardened washers. Nuts shall be identified by marking on one face with three similar circumferential markings, 120 degrees apart or, alternatively, with 2, D, 2H or DH and the manufacturers identification symbol. (b) Bolt and nut dimensions shall conform to the dimensions shown in Table 717-1. Nuts may be washer faced or double chamfered. (c) Circular washers shall be smooth and flat and their dimensions shall conform to Table 717-2. (d) Beveled washers for American Standard beams and channels shall be square or rectangular, shall taper in thickness, and shall conform to the dimensions given in Table 717-2. 717.05 Forgings. Forgings shall conform to the requirements of the following specifications: (a) Alloy steel forgings... Class A forgings shall be furnished unless otherwise specified. (b) Carbon steel forgings-- (ASTM A 235). Class C1 forgings shall be furnished unless otherwise specified. ASTM A 237. AASHTO M 102 717.06 Pins and Rollers. Pins and rollers more than 9 inches (228.6 mm) in diameter shall be annealed carbon-steel forgings conforming to AASHTO M 102, class C 1. Pins and rollers 9 inches (228.6 mm) or less in diameter shall be either annealed carbon-steel forgings conforming to AASHTO M 102 (ASTM A 235), class C 1, or cold finished carbon-steel shafting conforming to AASHTO M 169, grade 1016 to 1030, (ASTM A 108) inclusive, with a minimum Rockwell Scale B hardness of 85. Material not meeting the specifications for hardness may be accepted provided it develops a tensile strength of 70,000 psi (482.6 MPa) and a yield point of 36,000 psi. (248.2 MPa) Threads for pins shall conform to the ANSI B1.1 Coarse Thread Series, Class 2A. Pin ends having a diameter of 1% inches (34.93 mm) or more shall be threaded six threads to the inch. 717.07 Castings. Castings shall conform to the requirements of the following specifications: (a) Steel castings for highway bridges-AASHTO M 192 (b) Chromium alloy steel castings AASHTO M 163 (ASTM A 296). Grade CA-15 shall be furnished unless otherwise specified. (c) Gray iron castings AASHTO M 105 (ASTM A 48). Class No. 30 shall be furnished unless otherwise specified. Iron castings shall be true to pattern in form |