文档介绍：iiCopyright©2000byAmericanInstituteofSteelConstruction,,uracy,suitabilityandapplicabilitybyalicensedengineer,,,,-,March7,2000AMERICANINSTITUTEOFSTEELCONSTRUCTION•••iiiPREFACEAsinanyindustry,tradepracticeshavedevelopedamongthosethatareinvolvedinthedesign,purchase,,itisusefulforowners,architects,engineers,generalcontractors,construc-tionmanagers,fabricators,steeldetailers,erectorsandothersthatareasso-,theexistingtradepracticesthatarecontainedhereinareconsideredtobethestandardcus-tomandusageoftheindustryandaretherebyincorporatedintotherela-,anon-mentaryhasbeenpre-