《JIS-A-8960-2004-ENG.pdf》由会员分享，可在线阅读，更多相关《JIS-A-8960-2004-ENG.pdf（16页珍藏版）》请在三一文库上搜索。
1、Copyright Japanese Standards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/14/2007 19:23:49 MDTNo reproduction or networking permitted without license from IHS -,-,- J IS JAPANESE INDUSTRIAL STANDARD Translated and Published
2、 by Japanese Standards Association (ACCESS/ JSA) Vertical protective net for construction work ICs 59.080.30; 91.220 Reference number : JIS A 8960 : 2004 (E) PROTECTED BY COPYRIGHT 9s Copyright Japanese Standards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, Us
3、er=Wing, Bernie Not for Resale, 03/14/2007 19:23:49 MDTNo reproduction or networking permitted without license from IHS -,-,- A 8960 : 2004 Foreword T h i s translaion has been made based on he original Japanese Industrial Standard established by the Minister of Economy, Trade and Industry through d
4、eliberations at the Japanese Industrial Standards Committee according to the proposal of establishing a Japanese Industrial Standard from Alliance Cooperation of Construction Equipment Scaffolding for Safety (ACCESS)/ Japanese Standards Association (JSA), with a draft of Industrial Standard based on
5、 the provision of Article 12 Clause 1 of the Industrial Standardization Law. Attention is drawn to the possibility that some parts of this Standard may conflict with a patent right, application for a patent after opening to the public, utility model right or application for registration of utility m
6、odel after opening to the public which have technical properties. The relevant Minister and the Japanese Industrial Standards Committee are not responsible for identifying the patent right, application for a patent after opening to the public, utility model right or application for registration of u
7、tility model after opening to the public which have the said technical properties. Date of Establishment: 2004-03-20 Date of Public Notice in Official Gazette: 2004-03-22 Investigated by: Japanese Industrial Standards Committee Standards Board Technical Committee on Architecture JIS A 8960 : 2004, F
8、irst English edition published in 2004-11 Translated and published by: Japanese Standards Association 4-1-24, Akasaka, Minato-ku, Tokyo, 107-8440 JAPAN In the event of any doubts arising as to the contents, the original JIS is to be the final authority. O JCA 2004 Ail rights reserved. No part of thi
9、s publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from the publisher. Printed in Japan PROTECTED BY COPYRIGHT Copyright Japanese Standards Association Provided by IHS under license wi
10、th JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/14/2007 19:23:49 MDTNo reproduction or networking permitted without license from IHS -,-,- A 8960 : 2004 Contents Page Introduction . 1 2 3 4 5 5.1 5.2 6 7 7.1 7.2 7.3 7.4 7.5 8 8.1 8 -2 8.3 9 Scope Normative references De
11、finitions Shape and dimensions Qu ali t y . Appearance . Performance Structure . Test Measurement test for dimension of mesh . Test for tensile strength of net yarn . Tensile strength of rope . Penetration resistance property test Flame resistance performance test Inspection Sampling . Inspection fo
12、r tensile strength of net fabric and rope resistance property and shape and dimensions . Inspection for appearance. penetration resistance property, flame Marking . 1 1 1 1 3 5 5 5 5 6 6 6 8 8 10 11 11 11 11 11 i 1 PROTECTED BY COPYRIGHT Copyright Japanese Standards Association Provided by IHS under
13、 license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/14/2007 19:23:49 MDTNo reproduction or networking permitted without license from IHS -,-,- JAPANESE INDUSTRIAL STANDARD JIS A 8960 : 2004 Vertical protective net for construction work Introduction Since about 19
14、75, the net of synthetic fibre came to be used for pre- venting the bolts, tools and the like from falling at the time of steel frame construc- tion, because of its advantages such as recyclability, lightweight and handiness. And recently it is used at the construction site of high-rise buildings, c
15、ondominiums, shopping centres and the like. This time, for the purpose of unifying the quality and performance of the vertical protective net for construction work and ensuring the quality, this Japanese Indus- trial Standard has been established. 1 This Standard specifies the vertical protective ne
16、t for construction work (hereafter referred to as “vertical net”) prepared by using the woven or knitted net of which the main material is the woven net fabric of synthetic fibre. The dimen- sions of mesh of vertical net shall be limited to 13 mm or over up to and including 18 mm. The sheets of canv
17、as or sheets of net fabric of 12 mm or under in mesh are specified in JIS A 8952. Scope Information : 2 Normative references The following standards contain provisions which, through reference in this Standard, constitute provisions of this Standard. The most recent editions of the standards (includ
18、ing amendments) indicated below shall be applied. JIS A 8952 JIS G 3444 JIS G 4051 JIS L 1091 JIS L 2704 JIS L 2705 JIS L 2706 JIS L 2707 Fabric sheets for construction shelters Carbon steel tubes for general structural purposes Carbon steels for machine structural use Testing methods for flammabili
19、ty of textiles Nylon ropes Polyethylene ropes Polypropylene ropes Polyester ropes 3 Definitions a) net fabric the fabric composed of continuous mesh b) For the purpose of this Standard, the following definitions apply. hem rope net fabric the rope forming the sides of net by fixing to the circumfere
20、nce of c) d) e) fixing rope reinforcing rope dimension of mesh of net yarn (see figures 1 to 4) the rope to fix the net to steel frame and the like the rope to fix at the middle of net for reinforcement the length of one side of mesh measured between the cores PROTECTED BY COPYRIGHT Copyright Japane
21、se Standards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/14/2007 19:23:49 MDTNo reproduction or networking permitted without license from IHS -,-,- 2 A 8960 : 2004 dimension of net square net and the lengths of long side a
22、nd short side for a rectangular net square mesh the mesh of which the hem rope and the net yarn are in paral- lel (see figure i) rhombic mesh the mesh of which the hem rope and the net yarn are not in parallel (see figure 2) Raschel net fabric a kind of knotless net fabric of which the net fabric is
23、 knitted by Raschel netting machine knotless net fabric the net fabric of which the net yarns of mesh are not knotted at the crossing part but crossed alternately or combined as the strand of net yarn is twisted woven net the mesh prepared by weaving warp and weft (see figure 3) fork-shaped net the
24、net fabric formed by the fork shaped knot at the cross- ing part of net yarns of mesh (see figure 4) net yarn the yarn composing net fabric by twisting or combining several pieces of single yarn (see figure 6) knot the intersection point of net yarns the size of net expressed by the length of one si
25、de for a v Dimension of mesh a and b Figure 1 Mesh of vertical net (square mesh) ion of and b Figure 2 Mesh of vertical net (rhombic mesh) PROTECTED BY COPYRIGHT Copyright Japanese Standards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not fo
26、r Resale, 03/14/2007 19:23:49 MDTNo reproduction or networking permitted without license from IHS -,-,- 3 A 8960 : 2004 Figure 3 i Dimension of Dimension of mesh a and b mesh a and b Illustration of Figure 4 Illustration of fork woven net (example) shaped net (example) 4 Shape and dimensions a) b) T
27、he shape of vertical net shall be in accordance with figure 5. The dimensions and tolerance of vertical net shall be in accordance with table 1. PROTECTED BY COPYRIGHT Copyright Japanese Standards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie
28、Not for Resale, 03/14/2007 19:23:49 MDTNo reproduction or networking permitted without license from IHS -,-,- 4 A 8960 : 2004 Width x length rn 6 x 6 6 x 12 7 x 7 7 X 14 a) Net fabric Tolerance on width and length % +2 O c) Fixing rope . / Dimension c Figure 5 Shape of vertical protective net for co
29、nstruction work Table 1 Dimensions and tolerance of vertical net Remarks : The width and length other than the mentioned above may be determined according to the agree- ment between the parties concerned. PROTECTED BY COPYRIGHT Copyright Japanese Standards Association Provided by IHS under license w
30、ith JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/14/2007 19:23:49 MDTNo reproduction or networking permitted without license from IHS -,-,- 5 A 8960 : 2004 Tensile strength of net yarn (2) Tensile strength of rope (3) Penetration resistance property (41 5 Quality 270 N
31、min. 3 kN min. Not penetrate. 5 . 1 a) Appearance The hem rope and reinforcing rope shall be passed through the meshes with uniform intervals without skipping. The net fabric shall be free from the detrimental defects to use such as cut, break, distortion of shape, slippage of mesh, irregularities i
32、n knitting or weaving. The appearance of vertical net shall be as follows: b) Flame resistance property 5.2 conformed to the requirements in table 2. Performance The performance, when tested according to clause 7, shall be Shall be conformed to division 3 of method A-1 or division 3 of method A-2 in
33、 the classification method of flammability specified in clause 6 of JIS L 1091. In method D, it shall be conformed to division 2. Table 2 Performance of vertical net I Item I Performance I I Dimension of mesh(l) I 13 mm or over up to and incl. 18 mm I Notes (1) When the dimensions of mesh, a and b,
34、as shown in figures 1 to 4 are differ- ent, the larger value shall be taken as the dimension of mesh. (2) For the tensile strength of net yarn, the lowest value in the test data shall be conformed. (3) For the tensile strength of rope, the lowest value in the test data shall be con- formed. (4 For t
35、he penetration resistance test, all specimens to be used for the test shall be conformed. 6 Structure The structure of vertical net shall satisfy the following requirements. The vertical net shall consist of net fabric with hem rope, fixing rope and rein- forcing rope, and shall be constructed so th
36、at the ropes are not easily detached from net fabric, for example, the hem rope shall be passed through the second line of the meshes from the hem (see figure 6). The diameter of hem rope, fixing rope and reinforcing rope shall be at least 6 mm. When the length of vertical net exceeds 14 m, the rein
37、forcing ropes shall be fixed to the net at the rate of one per 14 m or less. The fixing ropes shall be fixed to the four corners of vertical net, and when the vertical net exceeds 7 m in dimension, they shall also be fixed to the hems at the rate of one per 7 m or less. PROTECTED BY COPYRIGHT Copyri
38、ght Japanese Standards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/14/2007 19:23:49 MDTNo reproduction or networking permitted without license from IHS -,-,- 6 A 8960 : 2004 e) The dimension(5) of mesh of vertical net shal
39、l be 13 mm or over up to and in- cluding 18 mm (see figures 1 to 4 ) . Note (5) When the dimensions of mesh, a and b, as shown in figure 1 to figure 4 are different, the larger value shall be taken as the dimension of mesh. b) Hem rope Figure 6 Reference drawing of passing of hem rope 7 Test 7.1 Mea
40、surement test for dimension of mesh mension of mesh of vertical net shall be as follows: The measurement test for di- a) The condition in laboratory shall be 20 “C f 2 “C in temperature and (65 k2) % in relative humidity (hereafter referred to as “standard condition”). The specimen for the test shal
41、l be the sufficient size to take the test pieces, sampled from the portion at least 50 cm from the end of net fabric, left in the laboratory in standard condition for a whole day and night as it is. Three test pieces of 15 meshes shall be taken each in lateral and longitudinal directions from the sp
42、ecimen conditioned in the laboratory in standard condi- tion, and the dimension of 10 meshes shall be measured while being applied 5 N of initial load. Each average value of three measurements in lateral and longitudinal directions shall be converted into the dimension per one mesh and expressed to
43、the nearest tenth by rounding off. b) c) 7.2 yarn of vertical net shall be as follows: a) Test for tensile strength of net yarn The test for tensile strength of net The condition in laboratory shall be 20 “C 2 2 “C in temperature and (65 + 2) % in relative humidity (hereafter referred to as “standar
44、d condition”). The specimen for the test shall be the sufficient size to take the test pieces, sampled from the portion at least 50 cm from the end of net fabric, left in the laboratory in standard condition for a whole day and night as it is. b) PROTECTED BY COPYRIGHT Copyright Japanese Standards A
45、ssociation Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/14/2007 19:23:49 MDTNo reproduction or networking permitted without license from IHS -,-,- 7 A 8960 : 2004 c) Five test pieces shall be taken each in lateral and longitudinal dire
46、ctions from the specimen conditioned in the laboratory in standard condition, and the ten- sile strength at break shall be measured by the constant-rate-of-extension ten- sile tester and expressed by the lowest value. i) The net yarns of knotted net fabric, knotless net fabric or woven net fabric sh
47、all be put together closely as much as possible and fixed to the upper clamp correctly. Then, the other end of test piece shall be fixed to the lower clamp without unnatural slack, and the measurement of straight tensile strength shall be carried out at 20 cm to 30 cm in clamp intervals and 20 cmmin
48、t 1 cdmin in tension speed (see figure 7 and figure 8). 4 Clamp part of tensile tester m) Netyarn .1 Figure 7 Method of tensile strength test for net yarn of knotless net fabric and knotted net fabric The measurement for the tensile strength of net fabric of Rasche1 net shall be carried out in a way that the steel hooks of 5 mm to 8 mm in diameter are fixed to the constant-rate-of-extension tensile tester, then the test piece prepared so as to have