jgt178-2005建筑结构用冷弯矩形钢管

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1、J6中华人民共和国建筑工业行业标准JG/T178-2005建筑结构用冷弯矩形钢管Cold-formedsteelhollowsectionsforbuildingstructures2005-07-19发布2005-12-01实施中华人民共和国建设部发布JG/T178-2005目次前言············，·········，，········，，····················，，，····················，，·································一I1范围·················

2、···················，·····································，····································⋯⋯12规范性引用文件·，，，································，·，····················，············」⋯⋯，，.·····⋯⋯，二13术语和定义·························，·······，，·······························，···········

3、···········，········⋯⋯14订货内容···················，······································，，·，···········································⋯⋯25制造工艺及交货状态···········，········，············，，······················，，······..···一，，，.·⋯，，，二26分类和标记·········..................................

4、.............................................:..................27技术要求·........................·····················，···································，·····，·············，·⋯⋯38外形允许偏差·，·····，························································，，，·····················，····

5、··⋯⋯，二49外形尺寸及截面特性·········································，···············，···············......····....⋯⋯610交货重量及交货长度“·······，············“····，，，··········‘·····，，。··············..·.·‘⋯，，1611试验方法··················，····，···································，····················

6、·········，············一1612验收规则························································，····················，···················⋯⋯1613包装、标志和质量证明书···，，，·········，·，·········，·，········，··········.·.·.........................⋯⋯，17附录A(资料性附录)本标准产品屈服强度等级的国内外常用原料牌号对照表···············

7、···，·一18附录B(资料性附录)公称截面特性计算公式····，·，····，··························，····················⋯⋯19JG/T178-2005月9吕本标准与国际标准ISO4019-2001(结构用冷弯空心型钢尺寸和截面特性》和ISO10799-2001《冷弯成型焊接中空结构钢技术交付要求》的一致性程度为修改。本标准与ISO4019-2001《结构用冷弯空心型钢尺寸和截面特性》的主要差异如下:—取消圆形冷弯空心型钢，正方形和长方形冷弯矩形钢管的组距和规格不同;—增加产品质量要求等级，分为

8、工级(较高级)和I级(普通级);—规定冷弯矩形钢管端部锯切斜度的允许值;—缩小工级产品平面凹凸度的允许值;-—放宽n级产品