3 and j34 respectively when more major misalignments

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tance in the 1999 AISC LRFD Specification Sections J3.3 and J3.4, respectively. When more major misalignments occur, it is indicated in the 2000 AISC Code of Standard Practice Section 7.14 that they are "... promptly reported to the [owner] and the fabricator by the erector, to enable the responsible enti- ty to either correct the error or approve the most efficient and economical method of correction to be used by others." Other General Information What precautions are required when cold bending material with sheared or flame-cut edges ? When cold bending plates or performing other operations involving cold bending and a sheared or flame-cut edge, care must be taken to preclude the initiation of cracks at the edge. Minimum inside radii for cold bending plates of various steel grades are indicated in AISC 3 rd Edition LRFD Manual Table 10-12 (Part 10). It is indicat- ed in the corresponding text therein that the tabular values may have to be increased when bend lines are par- allel to the direction of final rolling or longer than 36 in. Additionally, the Manual states that "Flame-cut edges of hardenable steels should be machined or softened by heat treatment. Nicks should be ground out and sharp corners should be rounded." What are the common length limits on fabricated structural steel members ? The maximum length of a fabricated assembly is primarily limited by shipping and erectability concerns, such as overall length and total weight. However, because individual practices and capabilities vary, it is best to consult with the fabricator directly. The common solution to a member length concern is a splice, which may be necessary and/or desirable for fab- rication, shipping, and/or erectability considerations. When approved by the SER, fabricator-initiated splices in members are acceptable. Common steel items, such as metal deck and open-web steel joists, are not considered to be structural steel in the 2000 AISC Code of Standard Practice. Why ? Even though items such as metal deck and open-web steel joists may be provided by the structural steel fabrica- tor, they are not considered to be structural steel because they are neither manufactured nor fabricated by the structural steel fabricator. As such they are listed in Section 2.2 as "other steel or metal items". Items that are nor- mally part of the fabricator's work are listed as structural steel items in Section 2.1.
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PAGE 13 APPENDIX FABRICATION AND ERECTION TOLERANCES Member Cross-sectional Tolerances Can out-of-tolerance mill material be adjusted by the fabricator so that it conforms to the appropriate tolerances ? Sometimes. Infrequently, material is discovered after delivery to be beyond mill tolerances. When material received from the rolling mill does not conform to the requirements of ASTM A6/A6M or more restrictive toler- ances that are specified in the contract documents, the fabricator can use controlled heating, mechanical straightening, or a combination of both methods, consistent with manufacturer recommendations, to adjust cross- section, flatness, straightness, camber, and/or sweep.
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