JGJ 128-2000英文 建筑施工门式钢管脚手架安全技术规范 英文版.doc

Industrial Standard of Peoples Republic of China建筑施工门式钢管脚手架安全技术规范Safety and Technical Code for Frame-Type Steel-Tube Scaffolds in ConstructionJGJ 1282000J432000Beijing 2000Industrial Standard of the Peoples Republic of China建筑施工门式钢管脚手架安全技术规范Safety and Technical Code for Frame-Type Steel-Tube Scaffolds in ConstructionJGJ 1282000Mainly prepared by: Harbin Industrial UniversityApproved by: The Ministry of Construction of the Peoples Republic of ChinaImplemented from: Dec. 1, 2000China Building Industry Publishing HouseBeijing 2000Notice for issuance of industrial standard “Safety and Technical Code for Frame-Type Steel-Tube Scaffolds in Construction”Jian Biao 2000 No. 223As required by “Notice for issuance of the plans for formulation and revision of standards and codes of project construction in 1989” released by the Ministry of Construction (89 Jian Biao Ji Zi No.8), “Safety and Technical Code for Frame-Type Steel-Tube Scaffolds in Construction” prepared by the former Harbin Architectural University has been reviewed and approved to be industrial standard, in which articles 3.0.4, 6.2.2, 6.2.4.1, 6.5.4, 6.8.1, 7.3.1.4, 7.3.1.5, 7.3.2.1, 7.3.3.1, 7.5.4.4, 7.5.4.5, 7.5.4.6, 8.0.1, 8.0.2, 8.0.3, 8.0.5, 8.0.7, 8.0.10 and 9.4.3.6 are compulsory. This standard is numbered as JGJ 1282000, and will be put into practice from Dec.1, 2000.This standard will be under management of Beijing Zhong Jian Architecture Scientific Technology Research Institute (subsidiary to the Ministry of Building and responsible for management of safety standard and technology in architecture engineering), and will be explained in detail by the current Harbin Industrial University. It is published by China Architectural Industry Publishing House under the organization of Standard Rating Research Institute, subsidiary to the Ministry of Building.The Ministry of Construction of the Peoples Republic of ChinaOct. 11, 2000PrefaceUpon requirement by 89 Jian Biao Ji Zi No. 8 document issued by the Ministry of Building, the group in charge of compilation of standards has formulated this code after an extensive investigation, serious summary of practical experiences, consultation of the relevant international standards and advanced foreign standards, and extensive collection of comments and proposals.This code is mainly consisted of: 1 General Rules; 2 Terminologies and Symbols; 3 Material Property of Elements and Fittings; 4 Load; 5 Design Calculations; 6 Configuration Requirements; 7 Erection and Removal; 8 Safety Management and Maintenance; 9 Template Support and Full Scaffold.This standard will be under management of Beijing Zhong Jian Architecture Scientific Technology Research Institute (subsidiary to the Ministry of Building and responsible for management of safety standard and technology in architecture engineering). The unit mainly in charge of compilation is authorized for explanation in detail.Mainly prepared by: Harbin Industrial UniversityParticipants: Shanghai Architecture Construction Technology Research Institute Shan Tou International Scaffold Company Beijing Li Jian Template CompanyWuxi Fareast Architectural Equipment CompanyMainly drafted by: Xu Chongbao Pan Ding La Lu Zhang Tiezheng Zhang Liangji Gu Hongjong Zheng Qiuping Zhang AiruGao Weicheng Jin Yi Ning Renzhi Yang WeidongTable of Contents1 General Rules62 Terminologies and Symbols62.1 Terminologies62.2 Symbols103Material Properties of Elements and Fittings124Load135Design Calculations155.1 Construction Design155.2 Stability and Erection Height of Scaffold155.3 Wall Connector176Configuration Requirements196.1 Porte Cochere196.2 Fittings196.3 Fasteners206.4 Connection of Porte Cochere at Corners206.5 Wall Connector216.6 Pathway Mouth226.7 Inclined Ladder236.8 Groundsill and Foundation237Erection and Removal247.1 Construction Preparations247.2 Foundation247.3 Erection257.4 Acceptance267.5 Removal278 Safety Management and Maintenance289 Template Support and Full Scaffold299.1 General Rules299.2 Template Support309.3 Full Scaffold339.4 Erection and Removal34Appendix A Quality Classification of Porte Cochere and Fittings35A.1 Quality Classification and Treatment Regulations of Porte Cochere and Fittings35A.2 Judgment of Quality Grade35A.3 Marks39A.4 Spot Check39Appendix B Sheets Used for Calculations39Explanation of Wording in This code431 General Rules1.0.1 This code is prepared for implementation of national laws and regulations related to safe production during design and construction of frame-type steel-tube scaffolds so as to ensure them to be technologically advanced, economically reasonable, and safe in use.1.0.2 This code is applicable for design, construction and use of floor (bottom bracing) frame-type steel-tube scaffolds used in construction of industrial and civil architectures. Design, construction and use of frame-type steel-tube scaffolds for other purposes (normal building such as chimney and water tower etc.) may follow the principles in this code.1.0.3 Erection height of floor frame-type steel-tube scaffolds should not exceed the specified height in Table 1.0.3 of this code.Table 1.0.3 Erection Height of Floor Frame-Type Steel-Tube ScaffoldsStandard value of constructional load SQk (kN/m2)Erection height (m)3.05.0 45 3.0 60Note: Constructional load refers to the sum of constructional load distributed evenly on each operation layer within one span.1.0.4 In addition to this code, design and construction of frame-type steel-tube scaffolds shall also be in compliance with the relevant current national compulsory standards.2 Terminologies and Symbols2.1 Terminologies2.1.1 Frame-type steel-tube scaffoldA kind of standard steel-tube scaffold. With basic structure consisted of porte cochere, x brace, pitman, hanging buckled scaffold board or horizontal bracket and locking arm etc., it is provided also with horizontal reinforcing rod, bridging, ground pole, seal bar, bracket and base, and is connected to the buildings main structures by wall connector.2.1.2 Porte cochereMain elements of frame steel-tube scaffold consist of standing pole, lateral pole and stiffener, which are welded reliably (figure 2.1.2)Figure 2.1.2 Porte Cochere1 standing pole; 2stiffener of standing pole; 3lateral pole;4stiffener of lateral pole; 5locking pin2.1.3 FittingsFrame steel-tube scaffold also contains other elements (figure 2.1.3), such as pitman, locking arm, x brace, horizontal bracket, hanging buckled scaffold board, pedestal and bracket. 2.1.4 PitmanAdapting piece used for vertical assembling of standing pole of porte cochere.2.1.5 Locking armAdapter at assembled joint of standing pole of porte cochere.2.1.6 X braceCrossover tie bar for connection of each two porte cochere.2.1.7 Horizontal bracketHorizontal element hanging buckled on lateral pole of porte cochere.2.1.8 Hanging buckled scaffold boardScaffold board hanging buckled on lateral pole of porte cochere.2.1.9 Adjustable pedestalElement to which the lower end of porte cochere is inserted, transmitting force to the foundation and having adjustable height.2.1.10 Fixed pedestalElement to which the bottom end of porte cochere is inserted, transmitting force to the foundation and having nonadjustable height.2.1.11 Adjustable bracketElement being placed on the top of standing pole of porte cochere, carrying upper load and having adjustable height.2.1.12Fixed bracketElement being inserted on the top of standing pole of porte cochere, carrying upper load and having nonadjustable height.Figure 2.1.3 Composition of Frame Steel-Tube Scaffold1- porte cochere; 2x brace; 3scaffold board; 4pitman; 5locking arm;6horizontal bracket; 7horizontal reinforcing rod; 8bridging; 9ground pole;10seal bar; 11pedestal; 12wall connector; 13rail; 14armrest;2.1.13 Reinforcing memberMember used for intensifying the rigidity of scaffold (figure 2.1.3), including bridging, horizontal reinforcing member, seal bar and ground pole.2.1.14 BridgingCrossover member at outer side of scaffold and in parallelism to wall.2.1.15 Horizontal reinforcing memberLongitudinal leveling pole in parallelism to wall.2.1.16 Seal barLateral leveling pole in connection with the bottom end of standing pole of bottom porte cochere. 2.1.17 Ground poleLongitudinal leveling pole in connection with the bottom end of standing pole of bottom porte cochere. 2.1.18 Wall connectorElement for connection of scaffold to main structure of building (figure 2.1.3).2.1.19 Pace lengthDistance between two lateral poles of porte cochere along scaffold vertically, which amounts to the sum of height of porte cochere and height of pitmans collar.2.1.20 Span of porte cochereAxial distance of two adjacent standing poles of porte cochere outside the plane of porte cochere.2.1.21 Interval of porte cochereAxial distance of two adjacent standing poles of porte cochere inside the plane of porte cochere.2.1.22 Height of scaffoldDistance from the bottom surface of pedestal to the top end of standing pole of porte cochere at top layer of scaffold.2.1.23 Length of scaffoldDistance between the outer surfaces of standing poles of two porte cocheres along scaffold longitudinally.2.2 Symbols2.2.1 Load and load effectQkstandard value of constructional load;wkstandard value of wind load;wo basic wind pressure;qkstandard value of linear wind load;NGk1 standard value of axial force created from self-weight of each meter height of scaffold;N Gk2standard value of axial force created from self-weight of accessories of each meter height of scaffold;NQik sum of standard axial force created from constructional load on each operation layer;Ndesign value of axial force acting on one porte cochere;Mkstandard value of bending moment created by wind load;Nt (Nc)design value of tensile (compression) force created from wind load and other factors;Nwdesign value of tensile force or compression acting on wall connector by wind load.2.2.2 Design index of materials and elementsfdesigned strength of steel material;Nvdesign value of tensile (compression) force for connections between wall connector and scaffold, and between wall connector and main structures.2.2.3 Geometrical parametersA1gross sectional area of standing pole of porte cochere;Agross sectional area of one porte cochere or wall connector;I0gross sectional inertia moment of standing pole of porte cochere;I1gross sectional inertia moment of stiffener of porte cochere;I-conversion sectional inertia moment of standing pole of porte cochere;h1stiffener height of standing pole of porte cochere (briefly called as stiffener of porte cochere)h0height of porte cochere;iconversion sectional turning radius of standing pole of porte cochere;l-ratio of length to width of standing pole of porte cochere;lspan of porte cochere;bwidth of porte cochere;a interval of porte cochere;H1vertical interval of wall connector;L1horizontal interval of wall connector;Hheight of scaffold;Hderection height of scaffold for un-combined wind load;erection height of scaffold for combined wind load.2.2.4 Calculation coefficientsz- coefficient of height variation of wind pressure;sphysical coefficient of wind load;stw physical coefficient of wind load as defined according to truss;windbreak coefficient;kadjustment coefficient;jstability coefficient of compression element at axes;3 Material Properties of Elements and Fittings3.0.1 Porte cochere and its fittings shall have specification, property and quality in compliance with the stipulations in the current industrial standard JGJ 76 “Frame Steel-Tube Scaffold”, and shall be provided with ex-works certificate of fitness and product trademark.3.0.2 Porte cochere and its fittings used for turnover shall be under quality grade determination, maintenance and use according to the stipulations in Appendix A of this code.3.0.3 Horizontal reinforcing rod, seal bar, bridging and adapting bar at corner of scaffold etc should use f 42 x 2.5mm or f 48 x 3.5mm welded steel tube, which material, under condition of weldability, shall be in compliance with the regulations of Q235A steel in the current national standard GB/T 700 “Carbon Constructional Steel”, and which shall also have the relevant fasteners of f42mm, f48mm or f 42mm/f48mm respectively.3.0.4 Steel tube shall be straight and flat, with a permissible deviation of 1/500 tube length. Both ends shall be even, free of any beveled edge or burr. It is forbidden to use steel tube with mechanical damage (forced bending, forced flattening etc) and severe rust.3.0.5 Fastener used for connection of O.D. 48mm steel tube shall have its property and quality in compliance with the regulations in the current national standard GB 15831 “Fastener of Steel-Tube Scaffold”. Fastener used for connection of O.D 42mm and 48m steel tubes shall be clearly marked in accordance with the relevant stipulations in the current national standard GB15831 “Fastener of Steel-Tube Scaffold”.3.0.6 When using profile steel such as steel tube and angle steel etc, wall connector shall have its material in compliance with the requirements of Q235A in the current national standard GB/T 700 “Carbon Constructional Steel”.3.0.7 Table B.0.1, B.0.2, B.0.3 and B.0.4 in Appendix B of this code may be used for calculation of typical porte cochere, fittings and fasteners.4 Load4.0.1 Load acting on scaffold is classified into permanent load (constant load) and variable load (live load). Permanent load shall include self-weight of scaffold and its auxiliaries; variable load shall include constructional load and wind load.4.0.2 Self-weight of scaffold shall include that of porte cochere and fittings etc. Weight of auxiliaries shall include that of reinforcing members and protective materials (such as toe plate, rail, safety net and fibre textile etc) etc. Design of scaffold shall have calculation made based on its actual set-up.4.0.3 Constructional load shall include the weight of operators, materials, transportation tools and mini tools etc on operation layer of scaffold, and shall meet the following regulations:1. Standard value of evenly-distributed constructional load shall be adopted based on the purpose of scaffold according to Table 4.0.3 in this code;Table 4.0.3 Standard Value of Evenly-Distributed Constructional Loadon Operation Layer Qk (kN/m2)Purpose of scaffoldStructureDecorationEvenly-distribute constructional load 3.02.0Note: in which, evenly distributed constructional load is equal to all loads within the span of two adjacent porte cocheres on one operation layer divided by the arithmetic product of span and porte cocheres width.2. When there are two or more operation layers on scaffold, the sum of standard values of evenly distributed constructional loads on each operation layer within one span shall not exceed 5.0kN/m2.4.0.4 Standard value of horizontal wind load acting on scaffold shall be calculated as follows:wk= 0.7 z s w0 (4.0.4)in which:wk standard value of wind load;w0 basic wind pressure, to be adopted according to the regulation in the current national standard GBJ 9 “Specification for Load of Architecture”;z coefficient of height variation of wind pressure, to be adopted in accordance with Article 6.2.1 in the current national standard GBJ 9 “Specification for Load of Architecture”;s physical coefficient of wind load of scaffold, which should be adopted according to Table 4.0.4.Table 4.0.4 Physical Coefficient s of Wind Load of ScaffoldBack-on BuildingWholly closedOpen, framework and bored wallStatus of scaffoldWholly closed, semi closed1.0 1.3 Openm stwNote: 1) Value mstw, the physical coefficient of wind load of scaffold defined according to truss, may be calculated in accordance with items 31, 32, 36 of Table 6.3.1 in the current national standard GBJ 9 “Specification for Load of Architecture”, and may be 0.25 for open scaffold with O.D of steel tube of standing pole at porte cochere being 42mm;2) is windbreak coefficient defined according to the status of scaffold. =windbreak area/windward area.4.0.5 During design of scaffold, stability and wall connector of scaffold shall be calculated based on the most unfavorable load combination according to the requirement of load combination in Table 4.0.5.Table 4.0.5 Load CombinationCalculation itemsLoad combination1. stability of scaffold1) permanent load + 1.0 constructional load2) permanent load + 0.85 (constructional load + wind load)2. strength and stability of wall connector1.0 wind load + 3.0kN5 Design Calculations5.1 Construction Design5.1.1 Construction design of scaffold engineering shall be listed into construction organization planning of unit project.5.1.2 Construction design shall include:1. Plane, elevation drawing and sectional drawing of scaffold;2. Fabrication method of scaffolds foundation;3. Arrangement and configuration of wall connector;4. Structure at corners and doorway of scaffold;5. Constructional load limit of scaffold;6. Calculations of scaffold, normally including calculation on stability or erection height of scaffold and calculation on wall connector;7. Design calculation for segmental erection or segmental unloading scheme;8. Safety measures for erection, usage and removal etc of scaffold.5.1.3 Structural design of scaffold shall be carried out in accordance with the stipulations in Chapter 6 of this code.5.2 Stability and Erection Height of Scaffold5.2.1 Stability of scaffold shall be calculated as follows: N Nd (5.2.1-1)In which:Ndesign value of axial force acting on one porte cochere, the bigger one of the two results calculated from formula (5.2.1-2) and formula (5.2.1-3);Nd -design value of stable bearing capacity of one porte cochere, calculated according to formula (5.2.1-5) or consulted from B.0.5.1. Design value of axial force acting on one porte cochere shall be calculated according to the following formula:1) For uncombined wind loadN=1.2 (NGk1 + NGk2) H + 1.4 NQik (5.2.1-2)In which:NGk1 standard value of axial force created from self-weight of elements and fittings for each meter height of scaffold;NGk2standard value of axial force created from self-weight of accessories of each meter height of scaffold;NQik sum of standard axial force created from constructional load on each operation layer;Hheight of scaffold, in m.1.2, 1.4sub coefficient of permanent load and variable load.2) For combined wind loadN=1.2 (NGk1 + NGk2) H + 0.85 x 1.4 (NQik + ) (5.2.1-3) Mk = (5.2.1-4)In which:Mk -standard value of bending moment created from wind load;qk standard value of linear wind load;H1vertical interval of wall connector;0.85coefficient of load effect combination 2. Design value of stable bearing capacity of one porte cochere shall be calculated according to the following formula: Nd = jAf (5.2.1-5)