507.01 Description.
ABUTMENT AND BULKHEAD ANCHORS
507.01 Description.
This Section shall cover the work of furnishing and installing complete abutment and/or bulkhead anchor assemblies for precast concrete bridges, timber bridges, and/or timber, met al, or concrete bulkheads, all in accordance with the details shown on the plans and at the locations shown on the plans or directed. Special reference is made to Section 510, Bridges.
507.02 Materials.
All materials shall comply with the appropriate requi rements of Division 800, Materials, and the following: Unless otherwise noted or provided by plan details, all miscellaneous hardware (turnbolts, clamps, bolts, etc.) shall be new galvanized metal, galvanized in accordance with AASHTO M 232. Wire rope (cab le) for rope anchor assemblies shall be of 3/4 inch {19 mm} nominal diameter. Wires shall meet the requirements of ASTM Designation A 475 "Siemens Martin" grade having a Class A galvanization coating or an approved equal. Galvanizing of materials completel y encased in concrete will not be required. Precast -Prestressed members of anchor assemblies shall comply with the appropriate requirements for precasting and prestressing concrete as noted in Sections 501 and 834.
507.03 Construction Requirements.
All anc hor assemblies shall be erected in accordance with the details shown on the plans or directed. Fabrication of integral parts of an anchor assembly shall be in accordance with the requirements of other appropriate sections of the Specification for the type material involved with specific reference made to Sections 833, 834, 835, and 836.
507.04 Method of Measurement.
An anchor assembly for an abutment shall consist of the number of sets of tieback cables or arms designated on the plans to connect an abutment to the anchors and includes the connecting system of fastening the cables or arms to the anchors and the abutment. Only one assembly will be measured for each abutment regardless of the number of anchors attached to the abutment. An anchor assembly for a bulkhead shall consist of the number of sets of tieback cables or arms designated on the plans to connect a section of a bulkhead to one anchor and includes the connecting system of fastening the cables or arms to the anchor and bulkhead. A separate assemb ly will be measured for each anchor attached to a bulkhead. The anchors will be measured and paid for under the appropriate item of piling designated for use as the anchors. The abutment or bulkhead will be measured and paid for under the appropriate item( s) of which the abutments or bulkheads are constructed.
507.05 Basis of Payment.
a.Unit Price Coverage . Accepted anchor assemblies, measured as noted above, will be paid for at the contract unit price per each which shall be full compensation for furnishing all materials along with the installation of the anchor assemblies, complete in place, attached to the anchor(s) and the abutment or bulkhead, and includes all incidental excavation, backfill, and compaction thereof, miscellaneous hardware, etc., and for all equipment, tools, labor, and incidentals necessary to complete the work.
b.Payment will be made under Item No .: 507-A Wire Rope Abutment/Bulkhead Anchor Assembly - per each 507-B Prestressed Concrete Abutment/Bulkhead Anchor Assembly - per each
508.03 Construction Requirements.
SECTION 508 STRUCTURAL STEEL AND MISCELLANEOUS METALS
508.01 Description.
The work under this Section shall cover the furnishing, fabricating, erecting, and painting (both shop and field) all structu ral steel and metal work. All work shall be in conformity with the dimensions, shapes and designs shown on the plans. Erected materials shall conform to lines and grades shown on the plans. Structural metals covered in this Section shall include structural steel shapes (except piling) and plates, bolts, and other types of fasteners, welding, special and alloy steels, steel forgings and castings, and all types of metal casting as well as any incidental metal construction not covered in other Sections. Weldin g of structural steel and other metals shall conform to the requirements of Article 836.46 and any modification thereto provided in the contract. Applicable requirements of Sections 510 and 521 shall also apply to this Section. Issues concerning non- confor ming work, repair procedures, requests for variances and/or clarification of Contract plans and/or Specifications including approved shop drawings shall be addressed by submitting ALDOT Bridge Bureau form BBF -15 “Request for Approval” (RFA) to the State Br idge Engineer for review and approval along with any supporting documentation.
508.02 Materials.
All materials shall conform to the provisions of Division 800, Materials, specific reference is made to the following: Section 836 - Structural Steel, Fastener s and Miscellaneous Metals. Section 855 - Coatings, Paints, Enamels, and Varnishes For Metal and Wood Structures. Except where otherwise provided, all members shall be of structural carbon steel. Pipe or tubing for railing shall be as specified on the plan s. Forgings shall be of carbon steel and shall be annealed before machine finishing. Castings shall be made of the type metal specified by the plans, but in general, cast iron shall be used only for unimportant parts. High strength steel fasteners shall conform to the requirements of Article 836.33. High strength steel lock -pin and collar fasteners will not be permitted unless noted in the plan details. Materials for bridge deck drainage systems shall conform to the requirements shown on the plans. Galvaniz ing, if required, shall conform to ASTM A 120 for pipe, AASHTO M 111 for forgings, shapes, etc., AASHTO M 232 for miscellaneous hardware and anchor bolt assemblies (anchor bolts, nuts, and washers), and ASTM B 695 Class 50 for bolt assemblies (bolts, nuts, and washers).
508.03 Construction Requirements.
a.General . Attention is directed to the requirements of Sections 105 and 836 concerning approval of "drawings", "mill orders and shipment statements," and "notice and facilities for inspection" before fabrication of structure members. All exposed structural steel surfaces, including piling, not in contact with concrete shall, unless otherwise noted by the plans or proposal, be painted in accordance with the provisions of Section 521 utilizing green bridge p aint for the top coat (or other color as specified by plans). The painting of the steel and the cost thereof is considered incidental to the furnishing of the structural steel. When a structure utilizing AASHTO M 270 Grade 50W (weathering) steel is designa ted to be unpainted, the steel shall be cleaned after fabrication (includes drilling and reaming) in accordance with the provisions of Steel Structures Painting Council specification SSPC- SP-6. All foreign material which adheres to the steel after fabricat ion, including tight mill scale, shall be removed without additional compensation. Tight mill scale on the top of the top flanges of girders and beams may remain except in the locations where studs are to be attached. The surface of the steel shall be clea ned to bright metal just prior to attaching studs. All temporary markings shall be removed before the final acceptance of the structural steel.
b.Shop Fabrication . The requirements for shop fabrication are given in Section 836. Within 30 days after the award of the contract, the Contractor shall submit the following items to the Bridge Engineer:
Source: Alabama Standard Specifications for Highway Construction, 2022 Edition. Pages 349–349 of 934.