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STRUCTURAL STEEL Section 05100 15-1207 Fabricator/Erector as written procedures and shall be submitted for examination. See Submittals. 3. Electrodes shall be in accordance with American Welding Society (AWS) Specifications, D1.1 for welding process used. 4. Follow applicable section of AWS specifications. 5. Welding process shall be limited to following processes: a. Shielded Metal Arc Welding. b. Flux -cored Metal Arc Welding. C. Gas Metal Arc Welding d. Submerged -arc Welding. 6. Requirements for workmanship and technique shall be as specified in AWS Code Sec. 3 and 5, including preheat and interpass temperatures, in accordance with Table 3.2 for process being used. 7. No combination of bolts and welds shall be used for stress transmission in same faying face of any connection. 8. Groove welds made in shop fabrications shall be terminated at ends of a joint by use of extension bars or run-off plates. These extensions shall be removed flush with base material edge. Weld dams are not allowed. 9. Complete penetration groove welds made with use of steel backing bars shall have weld metal thoroughly fused with backing bar. Backing bar shall be continuous for full length of weld. These bars shall be removed. Weld shall be back gouged and weld replaced in sufficient quantity to obtain smooth contour. Groove welds shall be made with stringer "passes only" - wash passes will not be allowed. 10. Fillet welds terminating at ends or sides shall be returned continuously for distance at least twice normal size of weld (end returns). 11. Intermittent and continuous welding, and straightening of built-up sections shall be done in manner to minimize internal stresses. 12. Welds not specified shall be continuous fillet welds, sufficient to transmit required forces, using minimum fillet as specified by AWS D1.1. 13. Welded Studs: Per AWS procedure. Furnish ASTM A307 Grade B Studs (with cut threads to attach wood nailer to steel) fillet welded to base metal. In lieu of ASTM A307 studs fillet welded to base metal, the Contractor may furnish "Nelson" type studs welded to the base metal with use of automatically timed stud welding equipment. Clean areas to receive studs; remove mill scale, rust, oil, grease, and other foreign material, which may inhibit fusion. Preheating not required if fusion tests meet AWS requirements. Provide one extra test stud per 50 studs welded for the automatically end -welded stud process. a. The studs shall be automatically end welded in accordance with the manufacturer's recommendations in such a manner as to provide complete fusion between the end of the stud and the plate. There should be no porosity or evidence of lack of fusion between the welded end of the stud and the plate. b. Welded Studs: Inspect per AWS D1.1 and CBC, Section 2212A.3 of all the shop and field welding operations for the automatic end welded studs shall be made by a qualified welding inspector (approved by the Division of the State Architect). The type and capacity of the welding equipment shall be in accordance with the manufacturer's recommendations and shall be checked and approved by a welding inspector. C. At the beginning of each day's work, a minimum of two test stud welds shall be made with the equipment to be used to metal which is the same as the actual 10