Be applied rationally with visual acceptance criteria

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be applied rationally, with visual acceptance criteria that are appro- priate for the distance at which the exposed element will be viewed in the completed structure. In order to avoid misunderstandings and to hold costs to a minimum, only those Structural Steel surfaces and Connections that will remain exposed and subject to normal view by pedestrians or occupants of the completed structure should be designated as AESS. 10.2. Fabrication 10.2.1. The permissible tolerances for out-of-square or out-of-parallel, depth, width and symmetry of rolled shapes shall be as specified in ASTM A6/A6M. Unless otherwise specified in the Contract Documents, the exact matching of abutting cross-sectional config- urations shall not be necessary. The as-fabricated straightness tol- erances of members shall be one-half of the standard camber and sweep tolerances in ASTM A6/A6M. 10.2.2. The tolerances on overall profile dimensions of members that are built-up from a series of Standard Structural Shapes, plates and/or bars by welding shall be taken as the accumulation of the variations that are permitted for the component parts in ASTM A6/A6M. The as-fabricated straightness tolerances for the member as a whole shall be one-half the standard camber and sweep tolerances for rolled shapes in ASTM A6/A6M. 10.2.3. Unless specific visual acceptance criteria for Weld Show-Through are specified in the Contract Documents, the members or compo- nents shall be acceptable as produced. Commentary: Weld Show-Through is generally a function of weld size and mate- rial thickness. 10.2.4. All copes, miters and cuts in surfaces that are exposed to view shall Code of Standard Practice for Steel Buildings and Bridges , March 7, 2000 AMERICAN INSTITUTE OF STEEL CONSTRUCTION 75
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APPENDIX PAGE 114 be made with uniform gaps of 1/8 in. [3 mm] if shown as open joints, or in reasonable contact if shown without gap. 10.2.5. All welds that are exposed to view shall be visually acceptable if they meet the requirements in AWS D1.1, except all groove and plug welds that are exposed to view shall not project more than 1/16 in. [2 mm] above the exposed surface. Finishing or grinding of welds shall not be necessary, unless such treatment is required to provide for clearances or fit of other components. 10.2.6. Erection marks or other painted marks shall not be made on those surfaces of weathering steel AESS members that are to be exposed in the completed structure. Unless otherwise specified in the Contract Documents, the Fabricator shall clean weathering steel AESS members to meet the requirements of SSPC-SP6. 10.2.7. Stamped or raised manufacturer’s identification marks shall not be filled, ground or otherwise removed. 10.2.8. Seams of hollow structural sections shall be acceptable as pro- duced. Seams shall be oriented away from view or as directed in the Contract Documents.
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  • Structural steel

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