503 ALASKA 2020 SECTION 716
716-2.01 SCOPE. Structural steel for highway bridges and other structural purposes.
716-2.02 GENERAL REQ UIREMENTS. Meet the following:
1.General requirem ents for delivery of rolled steel plates, shapes, and bars for structural ASTM A6
2.Structural Steel ASTM A709
3.Filler Metal for Applicable Arc -Welding Electrodes AWS Specifications
4.Stud Shear Connectors ASTM A108 Gr. 1015, or 1020
5.Raised Pattern Plate. Wh ere raised pattern plate is shown on the Plans, use plates with a raised pattern surface meeting the following requirements:
a.Use diagonal type pattern, with the intersecting diagonals at right angles to one another. Use the same material for the raised por tions of the pattern as the base metal of the plate. The raised pattern must be an inherent part of the plate. The pattern must be continuous throughout the surface of the plate and the projections along any diagonal must be spaced alternately with the projections along the normal diagonals.
b.Use plate with projections that are self -draining and self -cleaning and provide a skid- resistant surface from all angles of approach. The projections must have flat tops and be designed not to chip, crack, split, or buc kle at their intersection with the base metal.
6.Impact Test Requirements . Use structural steel and filler metal for applicable arc -welding electrodes meeting the following requirements:
a.For structural steel, meet the impact testing requirements and marking requirements of ASTM A709 for the specified grade, type of component, and impact testing temperature zone. If the grade is not specified, use Grade 36 steel. If the type of component is not specified, use steel grades marked with suffix T. If the impac t testing temperature zone is not specified, use steel marked for Zone 3.
b.For filler metal for applicable arc -welding electrodes, meet the minimum average energy values of the base metals to be joined when tested at or below the temperature corresponding t o the specified impact testing temperature zone of the base metal. Perform impact tests according to ASTM A370.
716-2.03 FASTENERS. Meet the following:
1.High Strength Bolts ASTM F3125, Grade A325
2.Nuts ASTM A563
3.Hardened Steel Washers ASTM F436
4.Zinc Coated Load Indicating Washers ASTM F959 Type 325
716-2.04 STEEL GRID FLOORS. Meet ASTM A709, Grade 36. If the material is not galvanized,
ensure the steel has a copper content of 0.2 percent minimum. Unless painting of floors is specified in the Special Provisions, open type floors must be galvanized.
716-2.05 MACHINE BOL TS. Meet ASTM A307.
504 ALASKA 2020 716-2.06 STEEL PIPE. Meet ASTM A53 Grade B.
716-2.07 GALVANIZING . Hot-dip galvanize structural steel shapes, plates, bars and their
products according to AASHTO M 111. Galvan ize tubes and piles on inside and outside surfaces. Hot-dip galvanize steel poles, mast arms, pedestals, and posts, according to AASHTO M 111. Submerge each component in the galvanizing kettle in one dip. Use only the dry kettle method of fluxing for high tower poles. Hot-dip galvanize all anchor bolts, nuts, washers, tie- rods, clamps, and other miscellaneous ferrous parts in conformance with AASHTO M 232. After galvanizing, ensure that the bolt threads accept galvanized standard nuts without requiring tool s or causing removal of protective coatings. Galvanize rigid metal conduit in conformance with AASHTO M 232. For steel bridge members, apply 10 mils zinc galvanizing by spray -metalizing process according to Steel Structures Painting Council’s coating sys tem guide SSPC -CS 23.00. Prepare surfaces before galvanizing according to Steel Structures Painting Council's surface preparation guide SSPC -SP 5, White Metal Blast Cleaning. Repair damaged coatings according to ASTM A780 Annex A1 or Annex A3, except as described herein. Clean the damaged area according to SSPC -SP 3, Power Tool Cleaning for repairs meeting Annex A1 and SSPC -SP 5/NACE No. 1, White Metal Blast Cleaning for repairs meeting Annex A3. . Extend the cleaned area 1/2 inch to 3/4 inch into the undamaged section of the coating. Keep the cleaned area dry and free of rust and s oiling. Within 24 hours of cleaning, coat the cleaned section with zinc to a thickness of not less than 10 mils when using the method in Annex A3 and not less than 3 mils when usi ng the method in Annex A1. Taper the thickness of the repair coating to match the original coating thickness at the edges of the cleaned section. Where zinc coating is to be metalliz ed in accordance with Annex A3, use zinc wire containing not less than 99. 98 percent zinc.
716-2.08 CERTIFICATI ON. Furnish a Certified Test Report from the manufacturer or an
independent testing laboratory containing a list of dimensional, chemical, metallurgical, electrical, physical, and other required test results of the spec ified material certifying that the product or assembly has passed all specified tests. Include the following:
1.the project name and number
2.the manufacturer's name
3.the name of the product or assembly
4.a complete description of the material
5.country of origin
6.the lot, heat, or batch number that identifies the material
7.all required test results for the specified material from the same lot, heat, or batch defined in Subsection 716- 2.08.6
8.an affidavit, 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 incorporated into the project has been sampled and tested and the samples have passed all specified tests. Tag, stencil, stamp, or otherwise mark al l 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. 505 ALASKA 2020 SECTION 718 STEEL FORGINGS
718-2.01 SCOPE. Steel forgings from which pins, rollers, trunnions or other forged parts are to be
fabricated.
718-2.02 GENERAL REQ UIREMENTS. Meet the dimensions shown on the Plans and the
following specifications.
1.Alloy Steel Forgings (general industrial use): AASHTO M 102, Class G.
2.Carbon Steel Forgings (general industrial use): AASHTO M 102, Class C.
3.Pins and Rollers
a.More than 7 inches in Diameter : Annealed carbon- steel forgings meeting AASHTO M 102, Class C.
b.7 inches or Less in Diameter : Either annealed carbon- steel forgings meeting AASHTO M 102, Class C or cold finished carbon- steel shafting meeting AASHTO M 169, Grade 1016 to 1030, inclusive, with a minimum Rockwell Scale B hardness of 80. Material not meeting the specifications for hardness may be accepted provided it develops a minimum tensile strength of 66,000 psi and a minimum yield point of 33,000 psi.
4.Threads for Pins : ANSI B 1.1, Class 2A coarse thread series. Thread pin ends, having a diameter of 1- 3/8 inch or more, 6 threads to the inch.
718-2.03 CERTIFICATI ON. Submit 5 copies of a certified mill test report covering chemical and
physical tests for the material in each shipment.
Source: Alaska Standard Specifications for Highway Construction, 2020 Edition. Pages 531–532 of 584.