JGT178-2005-建筑结构用冷弯矩形钢管.pdf

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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············，·········，，········，，····················，，，····················，，······························

2、···一I1范围····································，·····································，····································⋯⋯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···········，········，············，，·····················

4、·，，······..···一，，，.·⋯，，，二26分类和标记·········...............................................................................:..................27技术要求·........................·····················，···································，·····，·············，·⋯⋯3

5、8外形允许偏差·，·····，························································，，，·····················，······⋯⋯，二49外形尺寸及截面特性·········································，···············，···············......····....⋯⋯610交货重量及交货长度“·······，············“····，，，·····

6、·····‘·····，，。··············..·.·‘⋯，，1611试验方法··················，····，···································，·····························，············一1612验收规则························································，····················，··················

7、·⋯⋯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··················，·一18附录B(资料性附录)公称截面特性计算公式····，·，····，··························，····················⋯⋯19JG/T178-200

8、5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