《BS-1722-8-1997.pdf》由会员分享,可在线阅读,更多相关《BS-1722-8-1997.pdf(18页珍藏版)》请在三一文库上搜索。
1、BRITISH STANDARD BS 1722-8: 1997 Fences Part 8: Specification for mild steel (low carbon steel) continuous bar fences and hurdles ICS 91.090 Licensed Copy: sheffieldun sheffieldun, na, Fri Nov 24 08:21:36 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 1722-8:1997 This British Standard, having been pr
2、epared under the direction of the Sector Board for Building and Civil Engineering, was published under the authority of the Standards Board and comes into effect on 15 November 1997 BSI 03-2000 The following BSI references relate to the work on this standard: Committee reference B/201/2 Draft for co
3、mment 96/102031 DC ISBN 0 580 27418 7 Committees responsible for this British Standard The preparation of this British Standard was entrusted by Technical Committee B/201, Fences, to Subcommittee B/201/2, Fences Steel, upon which the following bodies were represented: Association of Security Consult
4、ants British Iron and Steel Producers Association Cold-rolled Sections Association Countryside Commission County Surveyors Society Department of the Environment (Security Facilities Executive) Electricity Association European Fencing Industry Association Fencing Contractors Association Institute of
5、Leisure and Amenity Management National Association of Steel Stockholders National Fencing Training Authority Royal Institute of Chartered Surveyors Scottish Office (Agriculture and Fisheries Department) Amendments issued since publication Amd. No.DateComments Licensed Copy: sheffieldun sheffieldun,
6、 na, Fri Nov 24 08:21:36 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 1722-8:1997 BSI 03-2000i Contents Page Committees responsibleInside front cover Forewordii 1Scope1 2Normative references1 3Dimensions and general characteristics1 4Materials and construction1 5Gates and points of access6 6Erectio
7、n6 7Corrosion protection7 Annex A (normative) Specifying a continuous bar fence8 Annex B (informative) Examples of designs for gates9 Figure 1 Continuous bar fence2 Figure 2 Welded bar hurdle fence4 Figure B.1 Examples of designs for gates9 Table 1 Types, categories and dimensions of continuous bar
8、fences1 Table 2 Types, categories and dimensions of welded hurdle fences3 Table 3 Spacing of horizontals3 Table 4 Dimensions of intermediate and joiner posts5 Table 5 Dimensions of end and corner posts5 List of referencesInside back cover Licensed Copy: sheffieldun sheffieldun, na, Fri Nov 24 08:21:
9、36 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 1722-8:1997 ii BSI 03-2000 Foreword This Part of BS 1722 has been prepared by Technical Committee B/201, Fences. It is a revision, taking current practice into account, of BS 1722-8:1992, which is withdrawn. BS 1722 is published in the following Parts
10、: Part 1: Specification for chain link fences; Part 2: Specifications for rectangular wire mesh and hexagonal wire netting fences; Part 4: Specification for cleft chestnut pale fences; Part 5: Specification for close boarded fences; Part 7: Specification for wooden post and rail fences; Part 8: Spec
11、ification for mild steel (low carbon steel) continuous bar fences and hurdles; Part 10: Specification for anti-intruder fences in chain link and welded mesh; Part 11: Specification for woven wood and lap boarded panel fences; Part 12: Specification for steel palisade fences; Part 14: Specification f
12、or open mesh steel panel fences; Part 16: Specification of organic powder coatings for use as a plastics finish to components and mesh. The various Parts specify requirements for the types of fence that are considered suitable for standardization. It should be noted that no attempt has been made to
13、standardize fences or gates of a purely decorative nature, or those suited to special requirements; nor to specify requirements for “patent” proprietary fencing systems. It is recommended, however, that the structure of such fences or gates should conform to those clauses of this Part of BS 1722 tha
14、t are applicable. It has been assumed in the drafting of this Part of BS 1722 that the execution of its provision is entrusted to appropriately qualified and experienced people. Before erection commences, the lead erector should either: a) have achieved the appropriate National Vocational Qualificat
15、ion (NVQ) or Scottish Vocational Qualification (SVQ) in Fence Erection (Level 2), relevant to this Part of BS 1722:1997; or b) be currently registered for the appropriate NVQ or SVQ in Fence Erection (Level 2), relevant to this Part of BS 1722:1997, provided such registration has not been in place f
16、or a period greater than 5 years from the date of registration without successful assessment having taken place. The purpose of this standard is to establish minimum requirements for materials and workmanship of the more common types of fence in order to ensure satisfactory service for the purchaser
17、, and to assist manufacturers and erecting contractors by eliminating unnecessary minor variations in the demands of purchasers. It specifies requirements for the components that make up a fence and the way in which the fence should be constructed. Throughout this standard there are requirements for
18、 sizes of components, together with the permissible tolerances on size. These are minimum requirements and it will normally be acceptable to use larger sizes, except where this would adversely affect the fitting of components, or where replacement parts are needed to match up with those already pres
19、ent. The choice of fence is affected by factors such as its intended purpose, the desired service life, aesthetic considerations, and the availability of components. The specifier can match a suitable choice of fence to its intended purpose by reference to Table 1, and also inform those erecting the
20、 fence of the basic characteristics that need to be provided. This standard includes requirements for protective treatments. However, maintenance requirements for the fence after its erection are outside the scope of this standard. Premature failure of the fence can be avoided by taking care not to
21、damage protective treatments during installation. Licensed Copy: sheffieldun sheffieldun, na, Fri Nov 24 08:21:36 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 1722-8:1997 BSI 03-2000iii Ground conditions may indicate that a variation in the length of a post, or of the depth to which the post should
22、 be set, is desirable. The post setting depths specified in this standard are for normal ground conditions, but where special ground conditions exist, e.g. if the ground is softer or firmer than usual, and these warrant variations in the specification, such variations should be agreed with the speci
23、fier. This also applies to other similar variations. It is assumed in this Part of BS 1722 that continuous bar fences and welded hurdle fences are erected on horizontal ground. Where gradients are encountered, continuous bar fencing is suitable, but special design measures may be deemed necessary. T
24、his Part of BS 1722 amends and augments the former Part 8 of BS 1722 in the following respects: Steel specifications and horizontal lengths are amended to cover current material availability and welding details are included. Obsolete fence types are deleted, and new additions made; guidance on found
25、ations is improved and post designs and types are amended accordingly. Design detail improvements are made; particularly for posts, wedges, gates and connectors. Criteria for design and loading capacity of gates and gate posts are given. It should be noted that in this Part of BS 1722 the fence post
26、 spacing is given in terms of centre distances. To assist the procedure of specifying fences, Annex A provides guidance on the most important details that should be specified at the time of ordering. Annex B provides some typical gate designs that meet aesthetic requirements and loading criteria. A
27、British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Summary of pages This document comprises a
28、front cover, an inside front cover, pages i to iv, pages 1 to 10, an inside back cover and a back cover. This standard has been updated (see copyright date) and may have had amendments incorporated. This will be indicated in the amendment table on the inside front cover. Licensed Copy: sheffieldun s
29、heffieldun, na, Fri Nov 24 08:21:36 GMT+00:00 2006, Uncontrolled Copy, (c) BSI iv blank Licensed Copy: sheffieldun sheffieldun, na, Fri Nov 24 08:21:36 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 1722-8:1997 BSI 03-20001 1 Scope This Part of BS 1722 specifies requirements for mild steel (low carbo
30、n steel) continuous bar fences for farm animal containment applications and welded hurdle fences of continuous bar type. A range of five specifications of fence of both types available, in three heights, is listed in Table 1 and Table 2. Requirements for the construction of suitable gates for these
31、fences is given in clause 3, which states certain functional requirements for the designs, but does not specify the designs in detail. A list of information that should be obtained from the purchaser at the time of enquiry and/or order is given in Annex A. 2 Normative references This Part of BS 1722
32、 incorporates, by dated or undated reference, provisions from other publications. These normative references are made at the appropriate places in the text and the cited publications are listed on the inside back cover. For dated references, only the edition cited applies; any subsequent amendments
33、to or revisions of the cited publication apply to this Part of BS 1722 only when incorporated in the reference by amendment or revision. For undated references, the latest edition of the cited publication applies, together with any amendments. 3 Dimensions and general characteristics The general dim
34、ensions of continuous bar fences and welded hurdle fences shall be as given in Table 1 and Table 2. 4 Materials and construction 4.1 Steel Flat, round and angle section steel shall conform to designation SJ275 of BS EN 10025:1993. Round tube shall conform to BS 1387:1985. Cold formed structural holl
35、ow sections shall conform to BS 6363:1983. NOTEDesignation SJ275 was formerly known as Fe430A. 4.2 Construction Continuous bar fence shall be constructed of a round top bar, mounted horizontally, and flat steel lower horizontal bars with joiner posts at 6 m or 3 m centres. Intermediate posts shall b
36、e spaced at 1 m intervals between joiner posts. Welded bar hurdles shall be similarly constructed, but produced in 2 m standard panels. End and corner posts shall be of hollow section or angle section (see Figure 1). 4.3 Components 4.3.1 Horizontal bars 4.3.1.1 Size and cross section Horizontal bars
37、 shall be of the size and cross section given in Table 1 and Table 2. One end of each flat bar shall be prepared either by bending or welding (see Figure 1) to facilitate the overlap at joiner posts. The top flat horizontal bar shall be prepared with a 12 mm 4 mm slot or keyway on the underside to f
38、acilitate seaming to joiner posts (see Figure 1). Table 1 Types, categories and dimensions of continuous bar fences Type referenceCategoryHeight of fence PostsHorizontals Depth in ground (min.) Distance apart (max.) NumberDiameter of top horizont al Lower flat horizont al With pronged feet or base p
39、lates With thrust plate mmmmmmmmmm CB/100/4Light duty1.003004001.0041625 6 CB/120/5Medium duty1.203505001.0052025 6 CB/120/6/HHeavy duty1.203505001.0062530 6 CB/150/6Medium duty1.503506001.0062025 6 CB/150/6/HHeavy duty1.503506001.0062530 6 Licensed Copy: sheffieldun sheffieldun, na, Fri Nov 24 08:2
40、1:36 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 1722-8:1997 2 BSI 03-2000 Figure 1 Continuous bar fence Licensed Copy: sheffieldun sheffieldun, na, Fri Nov 24 08:21:36 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 1722-8:1997 BSI 03-20003 Table 2 Types, categories and dimensions of welded hurdle
41、fences 4.3.1.2 Spacing Horizontal bars shall be spaced as in Table 3. Table 3 Spacing of horizontals 4.3.2 Intermediate and joiner posts 4.3.2.1 Sizes and cross section for continuous bar fences Intermediate and joiner posts shall be flats or angles of the sections shown in Table 4, and long enough
42、to provide the depth in ground given in Table 1 and Table 2. 4.3.2.2 Sizes and cross section for welded hurdle fences Intermediate and joiner posts shall be flats of the section shown in Table 4, and long enough to provide the depth in ground given in Table 1 and Table 2. 4.3.2.3 Base plates for con
43、crete-in posts A 150 mm 150 mm 3 mm base plate shall be welded to the base of the post when concreting is specified (see Figure 1). 4.3.2.4 Feet and thrust plates Posts shall have either: pronged feet of the same section as the post, with transverse bars not less than 350 mm in length, and prongs no
44、t less than 230 mm (see Figure 1 and Figure 2); or if preferred see A.3 a), for intermediate posts, a welded thrust plate 250 mm 150 mm 3 mm (with the 250 mm dimension at right angles to the vertical post). The minimum depth from ground level to the top of the thrust plate shall be 100 mm. NOTEThe 1
45、50 mm dimension of the thrust plate may be increased to suit poor soil conditions, if specified. Type referenceCategoryHeight of fence PostsHorizontals Depth in ground (min.) Distance apart (max.) NumberDiameter of top horizontal Lower flat horizontal With pronged feet or base plates With thrust pla
46、te mmmmmmmmmm WH/100/4Light duty1.003004001.0041625 6 WH/120/5Medium duty1.203505001.0052025 6 WH/120/6/HHeavy duty1.203505001.0062530 6 WH/150/6Medium duty1.503506001.0062025 6 WH/150/6HHeavy duty1.503506001.0062530 6 Heigh t of fence Number of horizonta ls Spacing between centres (starting from ce
47、ntre of top rail) mmm 1.004300280250 1.205300280240210 1.206300220170170170 1.506300280270260220 NOTEApproximately 150 mm space to ground line should be given by these spacings. Licensed Copy: sheffieldun sheffieldun, na, Fri Nov 24 08:21:36 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 1722-8:1997
48、4 BSI 03-2000 4.3.3 Ferrules and sockets At joiner posts, a split or solid 75 mm ferrule shall pass through the post in order to receive the round horizontals. The ferrule shall be provided with 6 mm grub screws, fasteners or rivets for fixing. NOTEThe ferrule may be welded into the joiner post, pro
49、vided that 50 % of the circumference is welded, on the uppermost face. At end or corner posts a 40 mm socket shall be welded to receive the round horizontals. 4.3.4 Wedges In continuous bar fences, split wedges of mild steel shall be provided for fixing flat horizontals (see Figure 1). The wedges shall be driven into the gap above the horizontal flats to achieve an interference fit with respect to the post slot; the upper leaf of the wedge being bent flush with the post surface. F
链接地址:https://www.31doc.com/p-3732668.html