Standard No.:	JGJ 231-2010
English Name:	Technical specification for safety of dick lock steel tubular scaffold in Construction
Chinese Name:	建筑施工承插型盘扣式钢管支架安全技术规程
Chinese Classification:	P09    Hygiene, safety and labor protection
Professional Classification:	JG    Professional Standard - Building
Issued by:	MOHURD
Issued on:	2010-11-17
Implemented on:	2011-10-1
Status:	superseded
Superseded by:	JGJ/T 231-2021 Technical standard for safety of disk locksteel tubular scaffold in construction
Superseded on:	2021-10-1
Abolished on:	2021-10-01
Language:	English
File Format:	PDF
Word Count:	14000 words
Price(USD):	350.0
Delivery:	via email in 1 business day

1 General 1.0.1 This specification is formulated with a view to implementing laws and regulations on national current safe production in the design and construction of disk lock steel tubular scaffold to ensure the security of construction personnel and achieve advanced technology, economy and rationality as well as safety and usability. 1.0.2 This specification is applicable to design, construction, acceptance and utilization of the erected formwork support and scaffold which are adopted with disk lock steel tubular scaffold in the constructions such as construction engineering and municipal engineering. 1.0.3 Where the height of the disk lock steel tubular double-pole scaffold is below 24m, it may be erected according to the structure requirements in this specification; design calculation for the foundation bearing capacity of the structural members and the standing tubes shall be carried out for the formwork support and the double-pole scaffold with height over 24m according to the requirements of this specification; and special construction plan shall be prepared according to the requirements of this specification. 1.0.4 The design, construction, acceptance and utilization of disk lock steel tubular scaffolds not only shall meet those specified in this specification, but also the requirements of current relevant national standards.

1 General 2 Terms and Symbols 2.1 Terms 2.2 Symbols 3 Material and Fabrication Quality Requirements for Main Members and Accessories 3.1 Main Members and Accessories 3.2 Materials Requirements 3.3 Fabrication Quality Requirements 4 Load 4.1 Load Classfication 4.2 Characteristic value of load 4.3 Partial Factor of Load 4.4 Load Effect Combinations 5 Structure Design Calculation 5.1 Basic Design Specifications 5.2 Foundation Bearing Capacity Calculation 5.3 Formwork Support Calculation 5.4 Doule-row External Scaffold Calculation 6 Structure Requirements 6.1 Formwork Support 6.2 Double-row External Scaffold 7 Erection and Removal 7.1 Construction Preparation 7.2 Construction Plan 7.3 Base and Foundation 7.4 Erection and Removal of Formwork Support 7.5 Erection and Removal of Double-row External Scaffold 8 Inspection and Acceptance 9 Safety Management and Maintenance Appendix A Type and Sizes for Members and Assessories of Main Products Appendix B Height Variation Factor for Wind Pressure Appendix C Relevant Design Parameter Appendix D Stability Factor for Axial Compression Member Appendix E Construction Acceptance Record for Disk Lock Steel Tubular Scaffold Explanation of Wording in this Specification List of Quoted Standards