《DD-1722-18-2007.pdf》由会员分享，可在线阅读，更多相关《DD-1722-18-2007.pdf（20页珍藏版）》请在三一文库上搜索。
1、DD 1722-18:2007 Fences Part 18: Specification for steel mesh site perimeter temporary fencing systems ICS 91.090 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW DRAFT FOR DEVELOPMENT This publication is not to be regarded as a British Standard. It is being issued in the Draft
2、for Development series of publications and is of a provisional nature so that information and experience of its practical application can be obtained. A review of this Draft for Development will be carried out not later than 2 years after its publication. Notification of the start of the review peri
3、od, with a request for the submission of comments from users of this Draft for Development, will be made in an announcement in the appropriate issue of Update Standards. According to the replies received, the responsible BSI Committee will judge whether the Draft for Development can be converted int
4、o a British Standard or what other action should be taken. Observations which it is felt should receive attention before the official call for comments will be welcomed. These should be sent to the Secretary of BSI Technical Committee B/201 at British Standards House, 389 Chiswick High Road, London
5、W4 4AL. Licensed Copy: London South Bank University, London South Bank University, Fri Oct 05 02:51:58 GMT+00:00 2007, Uncontrolled Copy, (c) BSI Publishing and copyright information The BSI copyright notice displayed in this document indicates when the document was last issued. BSI 2007 ISBN 978 0
6、580 60219 1 The following BSI references relate to the work on this standard: Committee reference B/201 Publication history First published January 2007 Amendments issued since publication Amd. no.DateText affected 1740428 September 2007 Correction to ISBN DD 1722-18:2007 Licensed Copy: London South
7、 Bank University, London South Bank University, Fri Oct 05 02:51:58 GMT+00:00 2007, Uncontrolled Copy, (c) BSI BSI 2007i DD 1722-18:2007 Contents Foreword iii 1Scope 1 2Normative references 1 3Fence panel 1 4Footblock 4 5Stabilizing system 5 6Installation guidance 6 7Renovation 6 Annexes Annex A (no
8、rmative) Test method to determine resistance to wind loads 7 Annex B (normative) Installation guidance 9 Annex C (normative) Renovation of damaged areas of pre-galvanized coating 11 Bibliography 12 List of figures Figure 1 Typical construction of a fence panel 3 Figure 2 Typical footblock 4 Figure 3
9、 Examples of stabilizing systems 5 Figure A.1 Apparatus for test to determine wind loading 9 Figure B.1 Fence couplers 10 List of tables Table 1 Requirements for pre-galvanized wire mesh 2 Summary of pages This document comprises a front cover, an inside front cover, pages i to iv, pages 1 to 12, an
10、 inside back cover and a back cover. Licensed Copy: London South Bank University, London South Bank University, Fri Oct 05 02:51:58 GMT+00:00 2007, Uncontrolled Copy, (c) BSI DD 1722-18:2007 ii BSI 2007This page deliberately left blank Licensed Copy: London South Bank University, London South Bank U
11、niversity, Fri Oct 05 02:51:58 GMT+00:00 2007, Uncontrolled Copy, (c) BSI BSI 2007iii DD 1722-18:2007 Foreword Publishing information This Draft for Development was published by BSI and came into effect on 31 January 2007. It was prepared by Technical Committee B/201, Fences and gates. A list of org
12、anizations represented on this committee can be obtained on request to its secretary. Relationship with other publications BS 1722 is published in parts as follows: Part 1: Specification for chain link fences; Part 2: Specification for strained wire and wire mesh netting fences; Part 4: Specificatio
13、n for cleft chestnut pale fences; Part 5: Specification for close boarded and wooden palisade fences; Part 7: Specification for wooden post and rail fences; Part 8: Specification for mild steel (low carbon steel) continuous bar fences and hurdles; Part 9: Specification for mild steel (low carbon ste
14、el) fences with round or square verticals and flat horizontals; Part 10: Specification for anti intruder fences in chain link and welded mesh; Part 11: Specification for prefabricated wood panel fences; Part 12: Specification for steel palisade fences; Part 13: Chain link fences for tennis court sur
15、rounds 1); Part 14: Specification for open mesh steel panel fences; Part 16: Specification for organic powder coatings to be used as a plastics finish to components and mesh; Part 17: Specification for electric security fences Design, installation and maintenance; Part 18: Specification for steel me
16、sh site perimeter temporary fencing systems 2). Information about this document The HSE welcomes this Draft for Development and will be participating in the development of a British Standard on steel mesh site perimeter temporary fencing systems. Use of this document As a Draft for Development, this
17、 document is of a provisional nature. It should not be quoted as if it were a British Standard and particular care should be taken to ensure that claims of compliance are not misleading. 1) Obsolescent. 2) Part 18 is published as a Draft for Development (DD). Licensed Copy: London South Bank Univers
18、ity, London South Bank University, Fri Oct 05 02:51:58 GMT+00:00 2007, Uncontrolled Copy, (c) BSI DD 1722-18:2007 iv BSI 2007 Presentational conventions The provisions of this standard are presented in roman (i.e. upright) type. Its requirements are expressed in sentences in which the principal auxi
19、liary verb is “shall”. Commentary, explanation and general informative material is presented in smaller italic type, and does not constitute a normative element. Contractual and legal considerations This publication does not purport to include all the necessary provisions of a contract. Users are re
20、sponsible for its correct application. Compliance with a Draft for Development cannot confer immunity from legal obligations. Licensed Copy: London South Bank University, London South Bank University, Fri Oct 05 02:51:58 GMT+00:00 2007, Uncontrolled Copy, (c) BSI BSI 20071 DD 1722-18:2007 Introducti
21、on This Draft for Development has been developed as a result of increasing concerns amongst industry leaders whose suggestions for further improvement have been solicited and incorporated into this document. NOTE 1 This process was supported by the construction industry and the HSE. NOTE 2 This Draf
22、t for Development has been written to address the concerns of the construction industry regarding the quality and safety of steel mesh site perimeter fencing. It gives clarity to the responsibilities of the construction industry to secure a construction site and protect the public. 1 Scope This Draf
23、t for Development specifies requirements for the manufacture of steel mesh site perimeter temporary fencing. It includes requirements for the dimensions and construction of fence components. Annex A describes a test method to be used by manufacturers or vendors to determine the wind resistance of th
24、e fence. Annex B gives recommendations for the installation of a steel mesh site perimeter temporary fencing system to be provided to vendors and users of the fencing system. Annex C gives recommendations for the renovation of damaged areas of pre-galvanized coating on fence panels. NOTE This Draft
25、for Development complements and expands on the guidance given by the Health and 2.0 m high. Licensed Copy: London South Bank University, London South Bank University, Fri Oct 05 02:51:58 GMT+00:00 2007, Uncontrolled Copy, (c) BSI DD 1722-18:2007 2 BSI 2007 The frame shall be constructed of hollow-se
26、ction tube pre-galvanized in accordance with BS EN ISO 1461. The hollow-section tube shall be a minimum of: 38 mm diameter; and 1 mm wall thickness. The sides and top of the fence panel shall be manufactured from a continuous length of hollow-section tube. NOTE 1 It is a common complaint in the cons
27、truction industry that welds at the corners of a rectangular panel break. The bottom horizontal tube shall be welded to the top section of the frame and reinforcing corner plates pre-galvanized in accordance with BS EN ISO 1461 shall be added to strengthen. NOTE 2 If small areas of pre-galvanized co
28、ating have been damaged, e.g. by welding or excessively rough treatment during transit, they should be renovated in accordance with Annex C. 3.2Mesh The mesh shall be pre-galvanized in accordance with BS EN 10244-2. The wires of the mesh shall be spaced in accordance with Table 1. NOTE The mesh is c
29、lose-spaced (anti-climb) to make it difficult to gain hand- and foot-holds. The mesh shall be spot welded to the frame as follows. a)A minimum of 8 times down each vertical side of the fence panel; and b)A minimum of 17 times along the top and bottom horizontal edges. 3.3Complete panel NOTE The typi
30、cal construction of a fence panel is shown in Figure 1. A complete panel constructed in accordance with 3.1 and 3.2 shall weigh a minimum of 15 kg. The gap between the bottom horizontal tube and the ground shall be a maximum of 120 mm. Table 1Requirements for pre-galvanized wire mesh PropertyMesh sp
31、ecification Vertical wiresHorizontal wires Minimum quantity80 per panel8 per panel Maximum spacing between wires42 mm254 mm Minimum diameter of wire2.5 mm3.5 mm Licensed Copy: London South Bank University, London South Bank University, Fri Oct 05 02:51:58 GMT+00:00 2007, Uncontrolled Copy, (c) BSI B
32、SI 20073 DD 1722-18:2007 Figure 1 Typical construction of a fence panel Key 1Panel length (see 3.1) 2Continuous hollow-section tube (see 3.1) 3Panel height (see 3.1) 4Gap between bottom horizontal and ground (see 3.3) 5Mesh (see 3.2) 6Bottom horizontal tube (see 3.1) 7Reinforcing corner plate (see 3
33、.1) 3 38 mm 6 1 7 5 38 mm 2 4 Licensed Copy: London South Bank University, London South Bank University, Fri Oct 05 02:51:58 GMT+00:00 2007, Uncontrolled Copy, (c) BSI DD 1722-18:2007 4 BSI 2007 4 Footblock COMMENTARY ON 4. The footblock is an integral part of the fencing system but can be a trippin
34、g hazard. The footblock is sufficient to support the fence during installation but a stabilizing system should be added as soon as possible. NOTE 1 An example of a typical footblock is shown in Figure 2. A footblock shall be a minimum of: 700 mm in length; 125 mm in height; and 220 mm in width. The
35、footblock shall be a high-conspicuity colour, e.g. orange or yellow, to warn the public of a potential tripping hazard. NOTE 2 A typical footblock construction is a blow-moulded vessel made from high-visibility polyethylene (i.e. polyethylene with a high-visibility masterbatch incorporated) filled w
36、ith high-density concrete. This construction enables the footblocks to be jet washed after use. NOTE 3 The footblock should not be painted as the paint might flake or chip off and the footblock might become a tripping hazard. NOTE 4 The footblock should have a UV screen incorporated to protect the c
37、olour from fading. The footblock shall weigh not less than 20 kg and no more than 24 kg. NOTE 5 Attention is drawn to the Health H is the panel height (m). d)Test mass The overturning moment, M, is simulated in the test. The test mass, T, to be used is calculated as follows: (A.4) A.2Apparatus NOTE
38、An example of the apparatus to be used is shown in Figure A.1. A.2.1 Fence panel, manufactured in accordance with Clause 3. A.2.2 Footblocks, manufactured in accordance with Clause 4. A.2.3 Stabilizing system (see Figure 3 for examples). A.2.4 Test rig, consisting of frictionless pulley, wire rope,
39、weights, etc. A.3Procedure A.3.1 Construct the fence in accordance with Annex B. A.3.2 Attach the wire rope over the frictionless pulley to the post upright of the fence panel at a height of 1.25 m from the bottom of the fence panel. A.3.3 Add the test mass, calculated according to equation A.4, to
40、the free end of the wire rope. A.3.4 Measure the deflection of the fence panel at the point of connection of the wire rope. A.4Expression of results If the deflection measured in A.3.4 is: a) 250 mm: the fence panel has passed the test; b)U250 mm: the fence panel has failed the test. A.5Test report
41、The following information shall be included in the test report. a)Reference to this Draft for Development, i.e. DD 1722-18:2007, Annex A. b)Details of the fence including the following items. 1)The manufacturer of the fence panel, footblocks and stabiliz- ing system. 2)Details (including size, weigh
42、t and any product identifiers) of the panel, footblocks and stabilizing system used. H 2 - T 2M 9.811.25 - -= Licensed Copy: London South Bank University, London South Bank University, Fri Oct 05 02:51:58 GMT+00:00 2007, Uncontrolled Copy, (c) BSI BSI 20079 DD 1722-18:2007 c)The type of ground (e.g.
43、 dry grass, high-density concrete) on which the fence was constructed. d)The test mass used (see equation A.4 and A.3.3). e)The outcome of the test (i.e. PASS or FAIL) according to A.4. Annex B (normative)Installation guidance NOTE The following installation guidance should be provided as a minimum
44、to all purchasers and users of steel mesh site perimeter temporary fencing systems. B.1Footblocks Footblocks should not be laid parallel to the fencing line as this causes the fence to be unstable. B.2Fence panels The ground on which the fence is to be installed should be levelled such that the gap
45、between the bottom horizontal tube and the ground does not exceed 120 mm (see 3.3). Fence panels should be lifted into position by at least two people. Figure A.1Apparatus for test to determine wind loading Key 1Pulley 2Weight 3Wire rope 4Connection between wire rope and fence panel 2 3 1 4 1250 mm
46、Licensed Copy: London South Bank University, London South Bank University, Fri Oct 05 02:51:58 GMT+00:00 2007, Uncontrolled Copy, (c) BSI DD 1722-18:2007 10 BSI 2007 When a fence is installed alongside a pedestrian walkway or public highway the fence panels should be inserted into the outside holes
47、of the footblocks (see Figure 2). NOTE If the fence panel is inserted into the centre holes the footblock will extend into the pedestrian walkway where it might be a trip hazard. B.3Fence couplers Fence panels should be joined together using two fence couplers of which at least one should be an anti
48、-tamper coupler. The distance between the fence couplers should be at least 1 m and should be uniform throughout the fence. NOTE 1 The use of anti-tamper couplers reduces the possibility of the fence panels being moved without authorization. NOTE 2 Figure B.1 shows a typical standard fence coupler a
49、nd an anti-tamper fence coupler Standard couplers held in place with a nut and bolt should be installed so that the nut is only accessible from inside the fence. Anti-tamper fence couplers should be installed so that they can only be removed from inside the fence. NOTE 3 An anti-tamper fence coupler can only be fitted or removed using a specialized tool which should be safeguarded by the site manager or other authorized person. Figure B.1Fence couplers a) Standa