ICS53.020.20J80备案号：33628—2011中华人民共和国机械行业标准JB/T11157—2011代替JB/T7—1993塔式起重机钢结构制造与检验Towercranes—Steelstructuremanufacturingandtesting2011-08-15发布2011-11-01实施中华人民共和国工业和信息化部发布JB/T11157—2011I目次前言....................................................................................................................................................................III1范围................................................................................................................................................................12规范性引用文件............................................................................................................................................13符号................................................................................................................................................................14图样................................................................................................................................................................25钢材与焊材....................................................................................................................................................25.1钢材.............................................................................................................................................................25.2焊条与焊丝.................................................................................................................................................36零部件加工....................................................................................................................................................36.1加工前的准备.............................................................................................................................................36.2下料.........................................................................................................................
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