AASHTO HB-17 DIVISION II SEC 23-2002 Division II Construction - Miscellaneous Metal《混杂金属》.pdf

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1、Section 23 MISCELLANEOUS METAL 23.1 DESCRIPTION This work shall consist of furnishing and installing metal items in structures which are not otherwise pro- vided for. Such work includes but is not limited to the fol- lowing items: (1) Expansion joint armor in bridge decks, and sliding plate and fing

2、er type expansion joints. (2) Manhole frames and covers, drainage pipes, frames and grates, ladders or ladder rungs, access opening covers, and access door assemblies. (3) Other items specifically identified as miscella- neous metal on the plans or in the specifications. 23.2 MATERIALS Miscellaneous

3、 metal items shall be constructed of ma- terials conforming to the following AASHTO (or ASTM) material specifications: Material Specification Steel Bars, Plates and AASHTO M 183 Shapes (ASTM A 36) Bolts and Nuts ASTM A 307 High-Strength Bolts, Nuts AASHTO M 164 and Washers (ASTM A 325) Steel Casting

4、s As per Article 11.3.5 Grey Iron Castings AASHTO M 105 (ASTM A 48), class 30 Sheet Metal Commercial quality 23.3 FABRICATION Fabrication of miscellaneous metal items shall be per- formed in a workmanlike manner in conformance with the practice in modem commercial shops. Burrs, rough and sharp edges

5、, and other flaws shall be removed. Warped pieces shall be straightened after fabrication and galva- nizing. 23.4 GALVANIZING Unless otherwise specified all steel items, which are not embedded at least 2 inches in concrete, and all cast iron sidewalk frames and covers shall be galvanized in ac- cord

6、ance with Articles 11.3.2.4 and 11.3.7 of Section 11, “Steel Structures. Assemblies shall be galvanized after fabrication. 23.5 MEASUREMENT Measurement of miscellaneous metal shall be by the scale weight. When requested by the Engineer, each delivery shall be accompanied with a certified weighmaster

7、s weight ticket. Scale weights are not re- quired when calculated weights are shown on the plans, in which case these weights shall be used as the basis of payment. 23.6 PAYMENT Miscellaneous metal will be paid for by the contract unit price per pound. Such payment shall include full compensation fo

8、r furnishing all labor, materials, tools, equipment and incidentals, and for doing all the work in- volved in furnishing and installing miscellaneous metal, complete in place, as shown on the plans, and as specified in these specifications and the special provisions, and as directed by the Engineer. 65 1