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1、J I S . UDC 69.057: 624.014.27 JAPANESE INDUSTRIAL STANDARD Tubular Steel Scaffolds JIS A 895 I -1985 Translated and Published by Japanese Standards Association Printed in Japan 21 s Copyright Japanese Standards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, Use
2、r=Wing, Bernie Not for Resale, 03/12/2007 23:27:48 MDTNo reproduction or networking permitted without license from IHS -,-,- J I S A*l!95I 85 m 4933b08 0005270 I P Translation without guarantee standard in Japanese is to be evidence i n the event of any doubt arising, the original Copyright Japanese
3、 Standards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/12/2007 23:27:48 MDTNo reproduction or networking permitted without license from IHS -,-,- UDC 69.057: 624.014.27 JAPANESE INDUSTRIAL STANDARD J I S Tubular Steel Scaf
4、folds A 8951-1985 1. ScoDe This Japanese Industrial Standard specifies the tubular steel scaffolds used for building works. Remark: The units and numerical values given in 1 in this standard are in accordance with the International System of Units (SI), and are appended for reference. 2. Classificat
5、ion The tubular steel scaffolds shall be classified into tube and coupler scaf- folding and prefabricated scaffolding. (1) Tube and Coupler Scaffolding It means the location scaffolding where steel pipes are assembled using clamps in a building site. (2) Prefabricated Scaffolding It means the locati
6、on scaffolding where vertical frames prefablicated using steelpipes as principal member and other members are assembled in a building site. 3. Names of Respective Parts 3.1 Tube and Coupler Scaffolding The names of respective parts of tube and coupler scaffolding shall be as follows (refer to Fig. 1
7、). Upright post Ledger Bracket Ridge directional brace Lateral bracing Wall binding met al fittings Accessory metals I , I Applicable Standards and Reference Standards: See page 38. l Copyright Japanese Standards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, Us
8、er=Wing, Bernie Not for Resale, 03/12/2007 23:27:48 MDTNo reproduction or networking permitted without license from IHS -,-,- J I S A*8951 85 4933b08 0005272 5 2 A 8951-1985 (8) Decking (9) MAEBUMI (Japanese) (Inner upright post for exterior main scaffolding) (10) ATOBUMI (Japanese) (Outer upright p
9、ost for exterior main scaffolding) Remark: The accessory metals shall be divided as follows: (1) Tube and Coupler Joint on a straight line. It is the joint for jointing two tubes (2) Clamp It is the following accessory metals used for tightening tubes intersecting them. (a) Cross Type Metal fittings
10、 used for crossing of tubes at right angles. (b) Adjustable Type Metal fittings used for intersecting tubes at optional angles. (3) Fixed Type Base Metal Fittings mitting the load of upright post to ground by attaching them to the lower end of upright post tube and so constructed as to consist of te
11、non and baseplate. They are metal fittings trans- Copyright Japanese Standards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/12/2007 23:27:48 MDTNo reproduction or networking permitted without license from IHS -,-,- O Ridge
12、directional bracing 3.2 Prefabricated Scaffolding The names of members of prefabricated scaffolding shall be as follows (refer to Fig. 2): (1) Vertical Frame (2) Ledger Frame li (3) Ledger Frame with Floor (4) Intersecting Brace l l (5) Corbelled Frame Copyright Japanese Standards Association Provid
13、ed by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/12/2007 23:27:48 MDTNo reproduction or networking permitted without license from IHS -,-,- J I S A*895L 85 4933b88 0005274 9 4 A 8951-1985 (6) Wall Binding Metal Fittings (7) Accessory Metals The
14、accessory metals shall be divided as follows: Leg Post Joint Arm Lock Jack Type Base Metal Fittings Clamp Fig. 2 Handrail, Handrail Post LeQger frame or, ledger frame with floor Vertical( frame Intersecting, brace Ledger frame or ledger frame 5 with floor Jack type base, metal fittings Wall binding
15、/ metal fittings floor Copyright Japanese Standards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/12/2007 23:27:48 MDTNo reproduction or networking permitted without license from IHS -,-,- 5 A 8951-1984 4. Quality (Material
16、Quality, Dimensions, Strength , Construction, etc. ) 4.1 Tube and Coupler Scaffolding 4.1.1 Steel Tubes for Tube and Coupler Scaffolding The quality of steel tubes for tube and coupler scaffolding shall be as follows: (1) The steel tubes for tube and coupler scaffolding shall conform to STK 51 speci
17、fied in JIS G 3444 and the dimensions shall be 48.6 mm in outer diameter and 2.5 mm in thickness. (2) The steel tubes for tube and coupler scaffolding shall be processed with couting having rustproof effect as follows: (a) The steel tube shall be coated after sufficiently cleaning it by sand- blasti
18、ng or pickling. (b) The quality of coatings of tube processed with zinc coating shall be Grade 1 HDZA of JIS H 8641 or that superior thereto, 4.1.2 Accessory Metals (1) The strength or the like of tube and coupler joint shall conform to Table 1 1 Table 1 Item Deflection and bending strength Elongati
19、on and tensile strength Compressive strength Sepecification 1. The amount of vertical deflection shall be 19 mm Max. 2. The maximum load shall be not less than the following values : Mean value Minimum value 300 kgf (2 942 N 1 270 kgf (2 647.8 N 1 1. The elongation shall be O. 9 mm max. 2, The maxim
20、um load shall be not less than the following values: Mean value Minimum value 1650 kgf (16 181 N 1 The maximum load shall be not less than the following values: 1500 kgf(l4 710 N Mean value Minimum value 4 200 kgf(41188 N 1 3 800 kgf(37 265.1 N Test method 6.1.1 (1) 6.1.1 (2) 6.1.1 (3) Copyright Jap
21、anese Standards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/12/2007 23:27:48 MDTNo reproduction or networking permitted without license from IHS -,-,- J I S A*851i 85 W q33bU8 U005276 2 Member Tube and coupler joint Clamp
22、6 A 8951-1985 Constitutional port Materials Tenon and collar SGP specified in JIS G 3452 Body and cover Bolt, nut and pin SPHD specified in JIS G 3131 SS 34 specified in JIS G 3101 (2) The strength of clamp shall conform to Table 2. Tenon Baseplate Fixed type base metal fittings Table 2 SGP specifie
23、d in JIS G 3452 SS 34 specified in JIS G 3101 Item Specification Specification I Test method 1. The variation amounts shall respec- tively be 10 mm max. 2. The maximum load shall be not less than the following values: (Cross type) Mean value 1600 kgf (15 690 N 1 Minimum value 1500 kgf (14 710 N 1 (A
24、djustable type) Mean value 1100 kgf (10 787.3 N 1 Minimum value 1 O00 kgf (9 806.6 N 1 6.1.2 (3) The materials of accessory metals shall conform to the requirements specified in Table 3 or shall have mechanical propertics equal or superior thereto. Table 3 (4) The construction of accessory metals sh
25、all be as follows: (4.1) The tube and coupler joint shall have collar at the central part of its tenon and conform to the following: (a) The thickness of tenon and collar shall be 2.2 mm min. (b) The length of both side parts of collar capable of being inserted into tube and coupler, shall be respec
26、tively 95 mm min. (c) It shall have the extraction proof function and said function shall be necessarily confirmed to surely operate. Copyright Japanese Standards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/12/2007 23:27:4
27、8 MDTNo reproduction or networking permitted without license from IHS -,-,- 7 A 8951-1985 The clamp shall have body, cover, bolt, nut and pin and further conform to the following: The plate thickness of body and cover shall be 3.0 mm min. The diameter of bolt shall be 9.0 mm min. including thread ri
28、dge. The fixed type metal fittings shall have tenon and base plate and further conform to the following: The thickness of its tenon shall be 2.2 mm min. and further the length of its part capable of being inserted into tube and coupler shall be 95 mm min. It shall have the extraction proof function.
29、 The thickness of base plate shall be 5.4 mm min. and further respective sides thereof shall be square or rectangle of 120 mm min. in side length. The base plate shall have a weep hole and not less than 2 nail holes. 4.2 Prefabricated Scaffolding 4.2.1 Material quality, dimensions and dimensional pe
30、rmissible deviations of members and accessory metals for prefabricated scaffolding. The material quality, dimensions and dimensional permissible deviation of members and accessory metals for prefabricated scaffolding shall conform to Table 4. However, as for material quality, those having mechanical
31、 properties equal or superior to this standard may be accepted. Copyright Japanese Standards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/12/2007 23:27:48 MDTNo reproduction or networking permitted without license from IHS
32、-,-,- J I S A*A951 85 4933608 0005278 6 M 8 A 8951-1985 t , U s E . I o d n U U E . fi i N e M x c, vi r s“ H 4 B 4 C h c g vi 8 B 1 I I Copyright Japanese Standards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/12/2007 23:2
33、7:48 MDTNo reproduction or networking permitted without license from IHS -,-,- 9 A 8951-1985 600, 610 750, 762 4.2.2 Dimensions of Vertical Frame The dimensions and dimensional permissible deviations of vertical frame shall conform to Table 5. 1600, 1625 1700, 1725 1800 Table 5 Unit: mm I 900, 914 1
34、200, 1219 Dimensional permissible deviations Dimensions 1600, 1625 1700, 1725 1900, 1925 1955, 2000 Il 2 1.0 I I Remarks 1 . The width herein means the distance between the centers of both leg posts at the upper end of leg post. 2. The height herein means the length including the dimension of collar
35、 of leg post joint. 4.2.3 Construction of Members and Accessory Metals The construction of members and accessory metals shall be as follows: (1) Vertical Frame The vertical frame shall be prepared by welding leg post, horizontal member and stiffener, having intersecting brace, and further shall conf
36、orm to the following: (a) The intersecting brace pin shall be 13.0 mm min. in diameter and it shall have the extraction proof function. (b) The vertical fitting interval of intersecting brace pins shall be 1200 mm and over to 1300 mm incl. (c) The attaching position of stiffener shall conform to Tab
37、le 6. Copyright Japanese Standards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/12/2007 23:27:48 MDTNo reproduction or networking permitted without license from IHS -,-,- 10 A 8951-1985 Table 6 Unit: mm Dimensions Dimension
38、s R 2 1150 min. 300 (170 for gate Vertical frame of 900 min. in width and 1800 max. in height type) min. I I 300 (170 for gate Vertical frame of 900 min. in width and over 1800 in height type) min. 1500 min. 170 (110 for gate Vertical frame of 600 and over to 650 incl. in width and 1800 max. in heig
39、ht type) min. 500 (1150 for gate type) min. I I 250 (110 for gate 500 (1150 for gate Vertical frame of over 650 to 900 excl. in width and type) min. type) min. 1800 max. in height I Remarks 1. The Ri and R2 in this table mean the dimensions given in (a) of Fig. 3. However, those in vertical frames o
40、f gate type mean the dimensions given in (b) of Fig. 3. Fig. 3 2. The names of constitutional parts shall be in accordance with Fig. 4. Copyright Japanese Standards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/12/2007 23:27
41、:48 MDTNo reproduction or networking permitted without license from IHS -,-,- Fig. 4 11 A 8951-1985 Horisont al Horizont al Tenon Intersecting brace pin Leg post Stiffener (lateral stiffener) I intersecting brace pin (2) Intersecting Brace The intersecting brace shall be prepared by binding two brac
42、e members at their central parts by hinge pin and further conform to the following: (a) The span and height thereof shall conform to Table 7. Table 7 Unit: mm Span 1 Height 1800 1829 1200 1219 (b) The brace member shall have pin holes of 15.0 mm max. in diameter at both ends and the distance between
43、 the centers of both pin holes shall be 2300 mm max. (c) The diameter of hinge pin shall be 6.8 mm min. li Fig. 5 Span Brace member Copyright Japanese Standards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/12/2007 23:27:48
44、MDTNo reproduction or networking permitted without license from IHS -,-,- J I S A*8951 85 4933608 0005282 B M 12 A 8951-1985 e (3) Ledger Frame The ledger frame shall have ledger member, bracket member and gripper metal fittings and further conform to the fol- lowing: (a) Its height shall be 400 mm
45、and over to 1100 mm incl. and its length shall be 1850 mm max. (b) Gripper metal fittings shall be jointed to both ends of ledger member by welding, or the like. The plate thickness of gripper metal fittings shall be 7.2 mm min. The gripper metal fittings shall have the dislocation-proof fittings to
46、 prevent the vertical frame from loosening from horizontal member, Fig. 6 ,Ledger inember I , Length of ledger frame / Gripper metal fittings Dislocation- proof fitting Ledger Frame with Floor floor member, ledger member, beam member and gripper metal fittings and conform to the following: The ledge
47、r frame with floor shall have It shall be prepared by welding floor member, ledger member and beam member, or by welding beam member to the floor member and ledger member unified by bending working or the like. For the ledger frame with floor having not less than 2 floor members, the clearance betwe
48、en the floor members shall be 30 mm max. Its width shall be 240 mm and over to 550 mm incl. and its length shall be 1850 mm Max. For the steel plate floor member, its plate thickness shall be 1.1 mm min. Gripper metal fittings shall be jointed to the four corners of ledger member or beam member by welding or rivetting. The pl