MISCELLANEOUS METALS 725.02 735 and welding positions in accordance with the requirements of ANSI/AASHTO/AWS D1.6, “Structural Welding Code – Stainless Stee l.”
B.Weathering Steel Bearing Assemblies Provide structural steel plate and angles in accordance with ASTM A709/A709M, Grade 50W for bridge structure anchor plates. Charpy V -Notch (CVN) Impact Testing will not be required. Paint the structural steel an chor plates after welding in accordance with Section 512 , “PAINTING.” Use a category “N ,” IZ-E-U paint system in accordance with subsection 512.04B.(2) . Coat all faying surfaces with the inorganic zinc primer from the system only. Apply the primer coat at the fabrication facility, and the intermediate and top coats at the project site. Provide continuously threaded steel bars in accordance with ASTM A270 (ASTM A709/A709M), Grade 50W. Charpy V -Notch (CVN) Impact Testing will not be required for bridge structure anchor bolts. Galvanize the anchor bolts in accordance with subsection 724.06. Provide steel nuts for anchor bolts in accordance with (ASTM A563), Grade C3 or DH3. Charpy V - Notch (CVN) Impact Testing will not be required. Galvanize the steel nuts in accordance with subsection 724.06 . Provide hardened steel washers for anchor bolts in accordance with (ASTM F436), Type 3, circular. Charpy V -Notch (CVN) Impact Testing will not be required. Galvanize the steel washers in accordance with subsection 724.06. Welding of weathering steel bearing assemblies will be in accordance with Subsection 724.03.
724.06 Galvanizing
Galvanize fasteners and hardware in accordance with AASHTO M 232/M232M (AS TM A 153/A 153M), except for the modifications in Subsection 724.02, “High Strength Fasteners.” Galvanize ferrous metal products, other than fasteners and hardware, in accordance with AASHTO M 111 (ASTM A 123/A 123M).
725.01 Steel Forgings
Provide steel forgings in accordance with AASHTO M 102 (ASTM A 668/ A 668M), Class C, Class D, Class F, or Class G.
725.02 Steel Castings
Provide castings that are true to pattern in form and dimensions, and free of defects that affect strength and value for the service intended. Provide covers and gratings that fit into frames and seat uniformly and solidly. Sandblast or clean castings of scale and sand to present a smooth, clean, uniform surface. Provide steel castings in accordance with Table 725:1.
725.04 Miscellaneous Metals
736 Table 725:1 Steel Casting Requirements Material Requirement Mild steel castings AASHTO M 192 (ASTM A486/ A486M), Class 70 (485), or AASHTO / M 103M (ASTM A27/ A27M), Grade 70-36 (485 -250) Chromium alloy -steel castings AASHTO M 163 (ASTM A743/ A743M), Grade CA-15M
725.03 Iron Castings
Provide iron castings in accordance with AASHTO M 306. Boldly fillet castings at angles and make the rises sharp and perfect. Ensure components are well -mated, non -rocking, and non -rattling. Ensure covers and grates fit tightly into frames and seat uniformly and solidly. Identify castings in an area shown on the Plans or in an area visible at the time of the units i nstallation. Recess the lettering 1/16 in [1.6 mm] from the surrounding surface. If a surface has a grid pattern, recess the lettering into a non -gridded area. Provide lettering content that includes the following: Manufacturer or distributor, Heat, pou r number, or both, and Casting date. Provide iron castings in accordance with Table 725:2: Table 725:2 Iron Casting Requirements Material Requirement Class 35B Gray Iron Casting AASHTO M 105 Ductile Iron Casting a ASTM A 536, Grade 65-45-12 (414 -276-18) Malleable Iron Casting ASTM A 47, Grade 24118 a In addition to contract required test coupons, test specimens from parts integral with the castings for castings with a mass greater than 100 lb [45 kg] to determine if finished castings obtain the specified quality.
725.04 Accessories for Cast Ings and Special Fab Ricated Units
A.Accessories for Castings Provide galvanized (zinc -coated), cadmium plated, or stainless steel machine bolts for casting assemblies in accordance with ASTM F31 25. DRAINAGE CONDUITS 726.01 737 Provide support beams for casting assemblies in accordance with ASTM A709, Grade 36.
B.Special Fabricated Drainage Grates Provide welded steel drainage grates with the load bearing members of the grates made with steel in accordance with ASTM A709,Grade 36. Provide stiffeners as recommended by the manufacturer. Weld in accordance with Section 724, “Structural Steel.” Provide pipe for fabricated pipe grates in accordance with ASTM A 53, in standard mass, unthreaded mill finish. The Department will waive hydrostatic pressure testing. Clean the grate units after welding. For galvanized units, punch or drill a pressure vent at the location shown on the Plans to prevent welded pipes from bursting during the galvanization process. Provide angle iron and strap iron for end members or spacers in accordance with ASTM A709, Grade 36 mill -finish. The Depa rtment will allow butt welded pipe for use as grate members. Provide welded steel drainage grate units galvanized after fabrication or painted with an inorganic zinc ethyl silicate base primer and vinyl finish coat. Galvanize in accordance with AASHTO M 111. Clean grate units and apply paint in accordance with Section 512, “Painting.” Use shop -applied paint for both coats.
725.05 Bronze Castings
Provide bronze castings in accordance with ASTM B22/B22M, Copper Alloy UNS No. C911 00. Provide bronze bearings and expansion plates in accordance with ASTM B100 Copper Alloy UNS No. C51000. SECTION 726 DRAINAGE CONDUITS
726.01 Rigid Conduits
A.Rigid Conduit Materials This subsection covers the following materials: Non -reinforced concrete pipe, Drain tile porous and perforated pipe, Circular reinforced concrete pipe, Arched reinforced concrete pipe, Elliptical reinforced concrete pipe, Precast reinforced concrete manhole sections, Precast reinfo rced concrete curb inlet boxes, Precast reinforced concrete junction boxes, Precast reinforced concrete box sections, and Cast ductile iron pipe. Provide the material required by the Contract in accordance with Table 726:1.
Source: Oklahoma Standard Specifications for Highway Construction, 2019 Edition. Pages 749–750 of 935.