Install metal fabrications in strict accordance with the Drawings, the approved Shop Drawings, and all applicable codes, regulations and standards. Obtain OWNER review prior to site cutting or making adjustments which are not parts of the scheduled work. Install items square and level, accurately fitted and free from distortion or defects. Align all metal fabrications as shown on the Drawings, and where vertical or horizontal members are shown. Align them straight, plumb and level within tolerance. Make provisions for erection stresses by temporary bracing. work in alignment. Replace items damaged in course of installation. Perform field welding in accordance with AWS D1.1 viii. After installation, grind smooth and touch-up field welds. WORKMANSHIP a. Layout: Set all work plumb, true, rigid, and neatly trimmed out. Miter corners and angles of exposed molding and frames unless otherwise noted. b. Fitting: Fit exposed connections accurately together to form tight hairline joints. c. Labor: Employ only workmen specifically skilled in such work. FABRICATION a. Shop assemble in largest practicable dimensions, making members true to length so assembling may be done without fillers. b. Provide all surfaces free of file marks, dents, hammer marks, wire edges or any unsightly surface defects. ATTACHMENTS AND REINFORCEMENTS a. Do all cutting, shearing, drilling, punching, threading, tapping, etc., required for site metalwork or for attachment of adjacent work. If applicable, drill or punch holes; do not use cutting torch. 7. ОTHER CONNECTORS: a. Make all permanent connections in ferrous metal surfaces using welds where at all possible; do not use bolts or screws. 8. WELDING a. Preparation: Remove all rust, paint, scale and other foreign matter. Wire brush all flame-cut edges. Clamp members as required and alternate welds, all as necessary to prevent warping or misalignment. b. Exposed Welds: Uniformly grind smooth (no tolerance) all welds normally exposed to view and feel in the finished work. c. Faulty and Defective Welding: Chip out and replace allwelding showing cracks, slag inclusion, lack of fusion, bad undercut or other defects ascertained by visual or other means of inspection. Replace and re-weld at no cost to OWNER. d. Field Welding: i. Procedure: Comply with AWS code of manual shielded metal-arc welding, appearance and quality of welds made, and methods used in correcting welding work. ii. Protection: Protect all adjacent surfaces from damage due to weld sparks, spatter, or tramp metal.
