建筑施工门式钢管脚手架安全技术规范

1、s Republic of ChinaIndustrial Standard of People建筑施工门式钢管脚手架安全技术规范Safety and Technical Code for Frame-TypeSteel-Tube Scaffolds in ConstructionJGJ 128- 2000J432000Beiji ng 2000叫c RecubaIndustrial Standard of the People建筑施工门式钢管脚手架安全技术规范' .V-Safety and Technical Code for Frame-TypeSteel-Tube Scaffol

2、ds in ConstructionJGJ 128- 2000Mai nly prepared by: Harbin In dustrial Un iversityApproved by:The Ministry of Construction of the People ' sRepublic of ChinaImpleme nted from: Dec. 1,2000，Chi na Buildi ng In dustry Publish ing HouseBeiji ng 2000Notice for issua nee of in dustrial sta ndard Safet

3、y and Tech ni cal Code foFrame-Type Steel-Tube Scaffolds in Con structi onIIJian Biao 2000 No. 223As required by Notice for issua nee of the pla ns for formulatio n and revisi on of sta ndards and codes of project construction in 1989II released by the Ministry of Construction (89Jia n Biao Ji Zi No

4、.8), Safety and Tech ni cal Code-foyperamssl-Tube Scaffoldsin Construction prepared by the former Harbin Architectural University has been reviewed and approved to be in dustrial sta ndard, in which articles 3.0.4, 6.2.2, 6.241, 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

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 12 2000, and will be put into practice from Dec.1,2000.This standard will be under management of Beijing Zhong Jian Architecture Scientific Tech no logy Research In stitute (subsidiary to the

6、Mini stry of Build ing and resp on sible for man ageme nt of safety sta ndard and tech no logy in architecture engin eeri ng), and will be expla ined in detail by the curre nt Harbin In dustrial Uni versity. It is published by China Architectural Industry Publishing House under the organization of S

7、tandard Rating Research Institute, subsidiary to the Ministry of Building.The Ministry of Construction of the People's Republic of ChinaOct. 11,2000PrefaceUpon requirement by 89 Jian Biao Ji Zi No. 8 document issued by the Ministry of Buildi ng, the group in charge of compilatio n of sta ndards

8、has formulated this code after an extensive investigation, serious summary of practical experiences, consultation of the releva nt intern ati onal sta ndards and adva need foreig n sta ndards, and exte nsive collecti on of comme nts and proposals.This code is mai nly con sisted of: 1 Gen eral Rules;

9、 2 Termi no logies 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 Maintenan ce; 9 Template Support and Full Scaffold.This standard will be under management of Beijing Zhong Jian A

10、rchitecture Scientific Tech no logy Research In stitute (subsidiary to the Mini stry of Build ing and resp on sible for man ageme nt of safety sta ndard and tech no logy in architecture engin eeri ng). The unit mainly in charge of compilation is authorized for explanation in detail.Mai nly prepared

11、by: Harbin In dustrial Un iversityParticipa nts: Shan ghai Architecture Con structio n Tech no logy Research In stituteShan Tou Intern ati onal Scaffold Compa nyBeijing Li Jian Template CompanyWuxi Fareast Architectural Equipme nt Compa nyMai nly drafted by: Xu Chon gbaoZhang Lia ngjiGao Weiche ngPa

12、n Di ngGu HongjongJin YiLa LuZheng Qiup ingNing Ren zhiZhang Tiezhe ngZhang AiruYang Weid ongTable of Contents1 Gen eral Rules62 Term ino logies and Symbols72.1 Termi nologies72.2 Symbols113 Material Properties of Elements and Fittings134 Load135 Desig n Calculati ons165.1 Con structi on Design165.2

13、 Stability and Erection Height of Scaffold165.3 Wall Conn ector196 Configuration Requirements206.1 Porte Cochere206.2 Fitti ngs216.3 Faste ners216.4 Connection of Porte Cochere at Corners226.5 Wall Conn ector236.6 Pathway Mouth246.7 In cli ned Ladder256.8 Groun dsill and Foun datio n257 Erecti on an

14、d Removal267.1 Con structi on Preparations277.2 Foun dati on277.3 Erection277.4 Acceptanee297.5 Removal308 Safety Man ageme nt and Maintenance319 Template Support and Full Scaffold.339.1 Gen eral Rules339.2 Template Support349.3 Full Scaffold379.4 Erecti on and Removal38Appendix A Quality Classifica

15、tion of Porte Cochere and Fittings39A.1 Quality Classificatio n and Treatme nt Regulati ons of Porte Cochere and Fitti ngs39A.2 Judgme nt of Quality Grade40A.3 Marks43A.4 Spot Check43Appe ndix B Sheets Used for Calculations44Expla nati on of Word ing in This code481 General Rules1.0.1 This code is p

16、repared for impleme ntati on of n ati on al laws and regulati ons related to safe producti on duri ng desig n and con struct ion of frame-type steel-tube scaffolds so as to en sure them to be tech no logically adva need, econo mically reas on able, and safe in use.1.0.2 This code is applicable for d

17、esig n, con structi on and use of floor (bottom braci ng) frame-type steel-tube scaffolds used in con structi on of in dustrial and civil architectures. Desig n, con struct ion and use of frame-type steel-tube scaffolds for other purposes (normal building such as chimney and water tower etc.) may fo

18、llow the prin ciples in this code.1.0.3 Erecti on 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 ScaffoldsStan dard value of con structi on al load2工 Qk (kN/m2)Erecti on hei

19、ght (m)3.0- 5.0< 45< 3.0< 60Note: Con struct ional load refers to the sum of con structi onal load distributed eve nly on each operati on layer with in one spa n.1.0.4 In additi on to this code, desig n and con structi on of frame-type steel-tube scaffolds shall also be in complia nee with

20、the releva nt curre nt n ati onal compulsory sta ndards.I.li2 Terminologies and Symbols2.1 Termino logies2.1.1 Frame-type steel-tube scaffoldA kind of standard steel-tube scaffold. With basic structure consisted of porte cochere, x brace, pitma n, hanging buckled scaffold board or horiz on tal brack

21、et and locking arm etc., it is provided also with horizontal reinforcing rod, bridging, ground pole, seal bar, bracket and base, and is conn ected to the build ing 'main structures by wall conn ector.2.1.2 Porte cochereMai n eleme nts of frame steel-tube scaffold con sist of sta nding pole, late

22、ral pole and stiffe ner, which are welded reliably (figure 2.1.2)Figure 2.1.2 Porte Cochere1 sta nding pole; 2 stiffe ner of sta nding pole; 3 lateral pole;4stiffe ner of lateral pole; 5 lock ing pin2.1.3 Fitti ngs叫Frame steel-tube scaffold also contains other elements (figure 2.1.3), such as pitman

23、, lock ing arm, x brace, horiz on tal bracket, hanging buckled scaffold board, pedestal and bracket.2.1.4 PitmanAdapti ng piece used for vertical assembli ng of sta nding pole of porte cochere.2.1.5 Lock ing armAdapter at assembled joint of sta nding pole of porte cochere.2.1.6 X braceCrossover tie

24、bar for connection of each two porte cochere.2.1.7 Horizontal bracketHoriz on tal eleme nt 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 pedestalEleme nt to which the lower end of

25、porte cochere is in serted, tran smitti ng force to the foun dati on and hav ing adjustable height.2.1.10 Fixed pedestal:h叢、护Eleme nt to which the bottom end of porte cochere is in serted, tran smitti ng force to the foun dati on and hav ing non adjustable height.2.1.11 Adjustable bracketEleme nt be

26、ing placed on the top of sta nding pole of porte cochere, carry ing upper load and hav ing adjustable height.2.1.12Fixed bracketEleme nt being in serted on the top of sta nding pole of porte cochere, carry ing upper load and hav ing non adjustable height.12Figure 2.1.3 Compositi on of Frame Steel-Tu

27、be Scaffold1- porte cochere; 2 x brace; 3 scaffold board; 4 pitma n; 5 lock ing arm;6horiz on tal bracket; 7 horiz on tal reinforcing rod; 8 bridgi ng; 9 ground pole;10seal bar; 11 pedestal; 12 wall c onn ector; 13 rail; 14armrest;2.1.13 Reinforcing memberMember used for in ten sify ing the rigidity

28、 of scaffold (figure 2.1.3), in clud ing bridg ing, horiz on tai reinforcing member, seal bar and ground pole.2.1.14 Bridgi ngCrossover member at outer side of scaffold and in parallelism to wall.2.1.15 Horiz on tal rein forci ng memberLon gitud in al leveli ng pole in parallelism to wall.2.1.16 Sea

29、l barLateral leveling pole in connection with the bottom end of standing pole of bottom porte cochere.2.1.17 Grou nd poleLon gitud in al leveli ng pole in conn ecti on with the bottom end of sta nding pole of bottom porte cochere.2.1.18 Wall conn ectorElement for connection of scaffold to main struc

30、ture of building (figure 2.1.3).2.1.19 Pace len gths collar.Dista nee betwee n two lateral poles of porte cochere along scaffold vertically, which amounts to the sum of height of porte cochere and height of pitma n2.1.20 Spa n of porte cochereAxial dista nee of two adjace nt sta nding poles of porte

31、 cochere outside the pla ne of porte cochere.2.1.21 In terval of porte cochereAxial dista nee of two adjace nt sta nding poles of porte cochere in side the pla ne of porte cochere.2.1.22 Height of scaffoldDistanee from the bottom surface of pedestal to the top end of standing pole of porte cochere a

32、t top layer of scaffold.2.1.23 Len gth of scaffoldDista nee betwee n the outer surfaces of sta nding poles of two porte cocheres along scaffold Ion gitud in ally.2.2 Symbols：ST2.2.1 Load and load effectQksta ndard value of con struct ion al load;y彳& .护左弋:：形.挣:wksta ndard value of wi nd load;wo -

33、basic wind pressure;qk sta ndard value of lin ear wind load;NGk1 -sta ndard value of axial force created from self-weight of each meter height of scaffold;N Gk2sta ndard value of axial force created from self-weight of accessories of each meter height of scaffold;艺 NQik -um of sta ndard axial force

34、created from con struct ional load on each operation layer;Ndesig n value of axial force act ing on one porte cochere;Mksta ndard value of bending mome nt created by wi nd load;Nt (Nc)design value of tensile (compression) force created from wind load and other factors;Nwdesign value of tensile force

35、 or compression acting on wall connector by wind load.2.2.2 Desig n in dex of materials and eleme ntsfdesig ned stre ngth of steel material;Nvdesign value of tensile (compression) force for connections between wall conn ector and scaffold, and betwee n wall conn ector and main structures.2.2.3 Geome

36、trical parametersA1 gross secti onal area of sta nding pole of porte cochere;Agross secti onal area of one porte cochere or wall conn ector;10 gross sect ional in ertia mome nt of sta nding pole of porte cochere;11 gross sect ional in ertia mome nt of stiffe ner of porte cochere;I-c onv ersi on sect

37、 ional in ertia mome nt of sta nding pole of porte cochere;h1stiffe ner height of sta nding pole of porte cochere (briefly called as stiffe ner of porte cochere)h0 height of porte cochere;i con versi on secti onal turni ng radius of sta nding pole of porte cochere;-ratio of len gth to width of sta n

38、ding pole of porte cochere;l spa n of porte cochere;bwidth of porte cochere;a in terval of porte cochere;H1 vertical in terval of wall conn ector;L1horiz on tal in terval of wall conn ector;H height of scaffold;Hderecti on height of scaffold for un-comb ined wind load;H ： erecti on height of scaffol

39、d for comb ined wind load.2.2.4 Calculati on coefficie nts卩 z- coefficient of height variation of wind pressure;卩 s physical coefficient of wind load;卩 stw -physical coefficient of wind load as defined according to truss;一w in dbreak coefficie nt;kadjustme nt coefficie nt;stability coefficie nt of c

40、ompressi on eleme nt at axes;3 Material Properties of Elements and FittingsPorte cochere and its fittings shall have specification, property and quality in complia nee with the stipulatio ns in the curre nt in dustrial sta ndard JGJ 76- FrameTube Scaffold and shall be provided with ex-works certific

41、ate of fit ness and product trademark.:. A吧歹嘗少"Porte cochere and its fitt ings used for tur no ver shall be un der quality grade determ in ati on, maintenance and use accord ing to the stipulatio ns in Appe ndix A of this code.Horizontal reinforcing rod, seal bar, bridging and adapting bar at c

42、orner of scaffold etc should use © 42 x 2.5mm or © 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 II , and which shallalso have th

43、e releva nt faste ners of 42mm, 48mm or 42mm/ 48mm respectively.Steel tube shall be straight and flat, with a permissible deviation of 1/500 tube length. Both ends shall be eve n, free of any beveled edge or burr. It is forbidde n to use steel tube with mecha ni cal damage (forced bending, forced fl

44、atte ning etc) and severe rust.Faste ner used for conn ecti on 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 SteeUube ScaffoldII . Fastener used for connection of O.D 42mm and 48msteel tubes shall

45、be clearly marked in accorda ncewith the releva nt stipulati ons in the current natio nal sta ndard GB15831 Faste neTfStSeteffoldWhe n using profile steel such as steel tube and an gle steel etc, wall conn ector shall have its material in compliance with the requirements of Q235A in the current nati

46、onal stan dard GB/T 700 Carbo n Co nstructio nal Steel II.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 LoadLoad acting on scaffold is classified into permanent load (constant load) and variable load (liv

47、e load). Perma nent load shall in clude self-weight of scaffold and its auxiliaries; variable load shall in clude con struct ion al load and wind load.Self-weight of scaffold shall in elude that of porte cochere and fitti ngs etc. Weight of auxiliaries shall include that of reinforcing members and p

48、rotective 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.Con struct ion al load shall in clude the weight of operators, materials, tran sportati on tools and mini tools etc on operati on layer of sc

49、affold, and shall meet the follow ing regulati ons:'J-,器1. Stan dard value of eve nly-distributed con struct ional load shall be adopted based on the purpose of scaffold accordi ng to Table 4.0.3 in this code;Table 4.0.3 Sta ndard Value of Eve nl y-Distributed Con struct ional Load2on Operation

50、Layer Qk (kN/m )Purpose of scaffoldStructureDecorati onEve nly-distribute con struct ion al load3.02.0Note: in which, eve nly distributed con struct ion al load is equal to all loads with in the spa n of two adjace nt porte cocheres on one operati on layer divided by the arithmetic product of span a

51、nd porte cochere' s width.2. When there are two or more operation layers on scaffold, the sum of standard values of eve nly distributed con structi on al loads on each operati on layer within one spa n shall not exceed 5.0kN/mStandard value of horizontal wind load acting on scaffold shall be cal

52、culated as follows:wk= 0.7楼 w0(4.0.4)in which:wk ta ndard value of wind load;w0 -basic wind pressure, to be adopted according to the regulation in the current n ati onal sta ndard GBJ 9Specificati on for Load of ArchitectureII；pz oefficient of height variation of wind pressure, to be adopted in acco

53、rdaneewith Article 6.2.1 in the curre nt n atio nal sta ndard GBJ 9 Specificatio n for Load oArchitecture II；ps - physical coefficient of wind load of scaffold, which should be adopted accord ing to Table 4.04Table 4.0.4 Physical Coefficient s of Wind poad of ScaffoldBack-on Buildi ng左fjp>Wholly

54、closedOpen, framework and bored wallStatus of scaffoldWholly closed, semi closed1.01.3Ope n卩stwNote:1) Value Jstw, 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

55、Specification for Load of Architecture ahd may be 0.25 for open scaffold with O.D of steel tube of sta nding pole at porte cochere being 42mm;2) is windbreak coefficient defined according to the status of scaffold. =win dbreak area/w in dward area.During design of scaffold, stability and wall connec

56、tor of scaffold shall be calculated based on the most unfav orable load comb in ati on accord ing to the requireme nt of load comb in ati on in Table 4.0.5.Table 4.0.5 Load Comb in ati onCalculation itemsLoad comb in ati on1. stability of scaffold1) perma nent load + 1.0 con struct ion al load2) per

57、manent load + 0.85 (constructional load + wind load)2. strength and stability of wall conn ector1.0 wind load + 3.0kNl.li5 Design Calculations5.1 Con structi on Desig n:I;*吧叹V少"5.1.1 Con structio n desig n of scaffold engin eeri ng shall be listed into con struct ion orga ni zati on pla nning of unit project.5.1.2 Con structi on desig n shall in clude:弋和总町弋孑.1. Pla ne, elevati on draw ing and secti onal draw ing of scaffold;柔诊