jgj130-20xx建筑施工扣件式钢管脚手架安全技术规范英文版

jgj130-20xx建筑施工扣件式钢管脚手架安全技术规范英文版内容摘要：

od scaffold board shall be made of fir or deal, with the material in pliance with the stipulation of Class II material in the current national standard GBJ5 ―Design Specification of Wood Structure‖, shall have a thickness of not less than 50mm, and shall be provided with two circles of galvanized wires (4mm in diameter) respectively at both ends. Bamboo scaffold board should be bamboochipped board or bamboofenced board made of Mao bamboo or Nan bamboo (it is normally 6 or 9 inches in height, with short distance between each other section, and is a good material for building). Wall Connecting piece Material of wall connecting piece shall be in pliance with the stipulation of Class Q235A steel in the current national standard GB/T700 ―Carbon Constructional Steel‖. 4. Load Classification of Load Load acting on scaffold may be classified into permanent load (constant load) and variable load (live load). Permanent load (constant load) may be classified into: 1) Selfweight of scaffold structure, including that of standing pole, longitudinal horizontal pole, lateral horizontal pole, XBracing, lateral diagonal and fastener etc。 2) Selfweight of ponents and fittings, including that of safeguard facilities, such as scaffold board, rail, stop lever, toe plate and safety etc. — 10 — Variable load can be classified: 1) Construction Load including the selfweight of workers, devices and materials on operation layer. 2) Wind load. Standard Load Value . Standard value of permanent load shall meet the following regulations: 1. Standard value of structure’s own weight borne by each meter of standing pole should be in accordance with Table A1 in Appendix A of this code. 2. Standard selfweight of stamped steel scaffold board, wood scaffold board and bamboo scaffold board shall be in accordance with Table . Table Standard SelfWeight of Scaffold Board Type Standard Value (kN/m2) Stamped steel Bamboo Wood 3. Standard selfweight of rail and toe plate shall be in accordance with Table . Table Standard SelfWeight of Rail and Toe Plate Type Standard Value (kN/m2) Rail, stamped steel scaffold board Rail, bamboo scaffold board Rail, wood scaffold board 4. Load of safeguard facilities (safety , reed mat, basketry and canvas) provided on scaffold shall be adopted according to actual situation. Standard live load evenly distributed for construction on operation layer shall be in accordance with Table for decoration scaffold and structural scaffold。 and shall be defined according to actual situation for scaffolds used for other purposes. Table Standard Value of Live Load Distributed Evenly during Construction Type Standard Value (kN/m2) Decoration Scaffold 2 Structural Scaffold 3 — 11 — Note: Standard live load distributed evenly on rampway shall not be less than 2 kN/m2. Standard value of horizontal wind load acting on scaffold shall be calculated according to the following formula: Wk= z * s * Wo () In which: Wk—Standard value of wind load (kN/m2)。 z –Coefficient of height variation of wind pressure, to be adopted in accordance with the current national standard GBJ 9 ―Specification for Load of Architecture Structure‖。 s— structure coefficient of wind load of scaffold, to be adopted in accordance with Table。 Wo—Basic wind pressure (kN/m2), to be adopted in accordance with the current national standard GBJ 9 ―Specification for Load of Architecture Structure‖. Structure coefficient of wind load of scaffold shall be adopted in accordance with Table . Table Structure coefficient of Wind load of Scaffold, s Backon Building Wholly closed Open, framework and bored wall Status of scaffold Wholly closed, semiscreened   Open  stw Note: 1. Value  stw may be calculated in accordance with item 32/36 of Table in the current national standard GBJ 9 ―Specification for Load of Architecture Structure‖, with scaffold being considered as truss。 2.  as windbreak coefficient, =  An/Aw, in which An refers to windbreak area, Aw windward area. Value  of open single and doublerow scaffold should be adopted in accordance with Table A3 in Appendix A of this code. Combination of Load Effects Design of weight carrying ponent of scaffold shall have calculation made to unfavorable bination of possible loads existing during the use. Combination of load effects should be in accordance with Table — 12 — Table Combination of Load Effects Calculation Items Combination of Load Effects Strength and deformation of longitudinal and lateral horizontal poles Permanent load + Live load distributed evenly during construction Stability of standing pole of scaffold (1) Permanent load + Live load distributed evenly during construction (2) Permanent load + (live load distributed evenly during construction + wind load) Bearing capacity of wall connecting piece Wind load + kN, for singlerow scaffold Wind load + kN, for doublerow scaffold For open scaffold only provided with rail and toe plate in the region where basic wind pressure is equal to or less than kN/m2, checking calculation of stability of scaffold’s standing pole may have wind load unconsidered when each wall connection covers not more than 30 m2 and the structure is in pliance with Section of this code. 5. Design Calculations Basic Design Regulations Bearing capacity of scaffold shall be designed by use of expression of subitem coefficients in accordance with the requirement of design method at probability limiting condition, and may have the following design calculations only: 1) Calculations of strength of ponents such as longitudinal and lateral horizontal pole and of antislip bearing capacity of connecting fastener。 2) Calculation of stability of standing pole。 3) Calculations of strength,。