1、BS 1722-8:2006Fences Part 8: Specification for mild steel (low carbon steel) continuous bar fences and hurdlesICS 91.090NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBRITISH STANDARDPublishing and copyright informationThe BSI copyright notice displayed in this document indica
2、tes when the document was last issued. BSI 2006ISBN 0 580 49505 1The following BSI references relate to the work on this standard:Committee reference B/201Draft for comment 06/30139503 DCPublication historyFirst published November 1951Second edition September 1966Third edition November 1978Fourth ed
3、ition December 1992Fifth edition November 1997Sixth (present) edition November 2006Amendments issued since publicationAmd. no. Date Text affectedBS 1722-8:2006 BSI 2006 iBS 1722-8:2006ContentsForeword ii1 Scope 12 Normative references 13 Dimensions and general characteristics 24 Materials and constr
4、uction 25 Construction of gates 86 Installation 107 Corrosion protection 128 Statement of conformity 13AnnexesAnnex A (informative) Specifying a continuous bar fence 14Annex B (informative) Examples of designs for gates 15Bibliography 17List of figuresFigure 1 Continuous bar fence 4Figure 2 Welded b
5、ar hurdle fence 6Figure B.1 Examples of designs for gates 16List of tablesTable 1 Types, categories and dimensions of continuous bar fences 2Table 2 Recommended steel grades 3Table 3 Types, categories and dimensions of welded hurdle fences 5Table 4 Spacing of horizontals 5Table 5 Dimensions of inter
6、mediate and joiner posts 7Table 6 Dimensions of end and corner posts 7Summary of pagesThis document comprises a front cover, an inside front cover, pages i to iv, pages 1 to 17 and a back cover.BS 1722-8:2006ii BSI 2006ForewordThis British Standard was published by BSI and came into effect on 30 Nov
7、ember 2006. It was prepared by Technical Committee B/201, Fences. A list of organizations represented on this committee can be obtained on request to its secretary. SupersessionThis part of BS 1722 supersedes BS 1722-8:1997, which is withdrawn.Relationship with other publicationsBS 1722 is published
8、 in parts as follows: Part 1: Specification for chain link fences; Part 2: Specification for strained wire and wire mesh netting fences; Part 4: Specification for cleft chestnut pale fences; Part 5: Specification for close-boarded and wooden palisade fences; Part 7: Specification for wooden post and
9、 rail fences; Part 8: Specification for mild steel (low carbon steel) continuous bar fences and hurdles; Part 9: Specification for mild steel (low carbon steel) fences with round or square verticals and flat horizontals; Part 10: Specification for anti-intruder fences in chain link and welded mesh;
10、Part 11: Specification for prefabricated wood panel fences; Part 12: Specification for steel palisade fences; Part 13: Chain link fences for tennis court surrounds1); Part 14: Specification for open mesh steel panel fences; Part 16: Specification for organic powder coatings to be used as a plastics
11、finish to components and mesh; Part 17: Specification for electric security fences Design, installation and maintenance; Part 18: Specification for steel mesh site perimeter temporary fencing systems2).Information about this documentIt should be noted that no attempt has been made to standardize fen
12、ces 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 that are applicabl
13、e.1)Obsolescent.2)Part 18 is in development and will be published as a Draft for Development (DD). BSI 2006 iiiBS 1722-8:2006This standard aims to establish minimum requirements for materials and workmanship of the more common types of fence in order to ensure satisfactory service for the purchaser,
14、 and to assist manufacturers and installing 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 fo
15、r 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 pre
16、sent. The choice of fence is affected by factors such as its intended purpose, the desired service life, aesthetic considerations, and the availability of components. By reference to Table 1, the specifier is able to match a suitable choice of fence to its intended purpose and is also able to inform
17、 those installing the fence of the basic characteristics that need to be provided.This standard includes requirements for protective treatments but does not include maintenance requirements. Premature failure of the fence can be avoided by taking care not to damage protective treatments during insta
18、llation.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, such variations should be agreed with the specifier. This also applies to other similar variations.It is assumed
19、in this part of BS 1722 that continuous bar fences and welded hurdle fences are installed on horizontal ground. Where gradients are encountered, continuous bar fencing is suitable, but special design measures may be deemed necessary.This part of BS 1722 amends and augments the former part 8 of BS 17
20、22 in the following respects:a) Steel specifications and horizontal lengths are amended to cover current material availability and welding details are included.b) Obsolete fence types are deleted, and new additions made; guidance on foundations is improved and post designs and types are amended acco
21、rdingly.c) Design detail improvements are made; particularly for posts, wedges, gates and connectors.d) 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 spacing is given in terms of centre distances.To assist t
22、he 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.BS 1722-8:2006iv BSI 2006Use of this documentIt has been assume
23、d in the drafting of this part of BS 1722 that the execution of its provisions is entrusted to appropriately qualified and experienced people. Before installation commences the lead installer should hold a current FISS/CSCS registration card skilled level (blue card) or equivalent and all other oper
24、atives should hold the basic fence operative card (green card) or equivalent.At the time of publication of this British Standard, the registration cards are validated by the Joint Fencing Industry Scheme (FISS) and Construction Scheme Skills Certification Scheme (CSCS). FISS/CSCS maintains a nationa
25、l register of fence installers and operatives. There might be other schemes available.Presentational conventionsThe provisions of this standard are presented in roman (i.e. upright) type. Its requirements are expressed in sentences in which the principal auxiliary verb is “shall”.Commentary, explana
26、tion and general informative material is presented in smaller italic type, and does not constitute a normative element.Requirements in this standard are drafted in accordance with The BSI guide to standardization Section 2: Rules for the structure, drafting and presentation of British Standards, sub
27、clause 11.3.1, which states, “Requirements should be expressed using wording such as: When tested as described in Annex A, the product shall .”. This means that only those products that are capable of passing the specified test will be deemed to conform to this standard.Contractual and legal conside
28、rationsThis publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application.Compliance with a British Standard cannot confer immunity from legal obligations. BSI 2006 1BS 1722-8:20061 ScopeThis part of BS 1722 specifies requiremen
29、ts for mild steel (low carbon 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 3. Requirements for the construction
30、of suitable gates for these fences is given in Clause 5, 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 refer
31、encesThe following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.BS 1722-16, Fences Part 16: Specification of
32、organic powder coatings for use as a plastics finish to components and meshBS 4620, Specification for rivets for general engineering purposesBS 7371-3, Coatings on metal fasteners Part 3: Specification for electroplated zinc and cadmium coatingsBS 7371-6, Coatings on metal fasteners Part 6: Specific
33、ation for hot dipped galvanized coatingsBS 7371-8, Coatings on metal fasteners Part 8: Specification for sherardized coatingsBS EN 287-1, Qualification test of welders Fusion welding Part 1: SteelsBS EN 1011-1, Welding Recommendations for welding of metallic materials Part 1: General guidance for ar
34、c weldingBS EN 1011-2, Welding Recommendations for welding of metallic materials Part 2: Arc welding of ferritic steelsBS EN ISO 1461:1999, Hot dip galvanized coatings in fabricated iron and steel articles Specifications and test methodsBS EN ISO 2063, Thermal spraying Metallic and other inorganic c
35、oatings Zinc, aluminium and their alloysBS EN ISO 4014, Hexagon head bolts Product grades A and BBS EN ISO 12944 (all parts), Paints and varnishes Corrosion protection of settle structures by protective paint systemsBS 1722-8:20062 BSI 20063 Dimensions and general characteristicsThe general dimensio
36、ns of continuous bar fences and welded hurdle fences shall be as given in Table 1 and Table 3.4 Materials and construction4.1 Material formSteel posts, gates and rails shall be produced from the following:a) Rolled steel angle (RSA)3);b) Flat section bar4)and round section bar5);c) Rectangular or sq
37、uare hollow sections (RHS)6)7);d) Circular hollow sections (CHS)5)6) or round tubes 5)6).4.2 Material gradesThe steel grade(s) employed shall be specified by the customer (the purchaser, fence designer, supplier, component manufacturer, fabricator or installer, as applicable) on the basis of the mec
38、hanical properties, formability and weldability required. Appropriate mild steel grades shall be selected from national or international standards. Table 1 Types, categories and dimensions of continuous bar fencesType referenceCategory Height of fencePosts HorizontalsDepth in ground (min.)Distance a
39、part (max.)Number Diameter of top horizontalLower flat horizontalWith pronged feet or base platesWith thrust platem mm Mm M mm mmCB/100/4 Light duty 1.00 300 400 1.00 4 16 25 6CB/120/5 Medium duty 1.20 350 500 1.00 5 20 25 6CB/120/6/H Heavy duty 1.20 350 500 1.00 6 25 30 6CB/150/6 Medium duty 1.50 3
40、50 600 1.00 6 20 25 6CB/150/6/H Heavy duty 1.50 350 600 1.00 6 25 30 63)Fence posts only.4)Intermediate posts, joiner posts and horizontal rails.5)Top rails only.6)End, gate or corner posts only.7)Gates. BSI 2006 3BS 1722-8:2006Steel grades to be considered shall have a minimum yield strength in exc
41、ess of 175 N/mm2, unless the design permits lower strength materials to be employed. NOTE 1 Tubes and hollow sections can be hot or cold formed.Where components are to be hot dipped galvanized, the purchaser shall confirm with the supplier that the steel composition is suitable.NOTE 2 A non-exhausti
42、ve range of recommended material grades is given in Table 2.4.3 ConstructionA 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 be spaced at 1 m intervals between
43、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).4.4 Components4.4.1 Horizontal bars4.4.1.1 Size and cross-sectionHorizontal bars shall be of the size and cross-sectio
44、n given in Table 1 and Table 3.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 facilitate seaming to joiner posts (see F
45、igure 1).Table 2 Recommended steel gradesMaterial Dimensional standard Material standard Material gradeA)Rolled steel angleFlat barRound barBS EN 10056-1BS EN 10058BS EN 10060BS EN 10025-2S185/S235JRCircular, square or rectangular hollow sectionsBS EN 10210-2BS EN 10219-2BS EN 10210-1BS EN 10219-1S2
46、35JRHS235JRHCircular tubes BS EN 10255BS EN 10296-1DIN 1615BS EN 10255BS EN 10296-1DIN 1615S195TE155B)/E190/E195ST 33Plate for baseplates, caps, etc. BS EN 10025-2 S185/S235JRA)Where applicable, the use of higher strength or more enhanced grades than those shown is permissible, provided that they me
47、et the necessary requirements for formability, weldability or galvanizing.B)Where the design permits.BS 1722-8:20064 BSI 2006Figure 1 Continuous bar fenceDimensions in millimetresKey1 End or corner post with round bosses or lugs2 Round horizontal top3 Flat or angle intermediate posts4 Steel wedge at
48、 each junction of intermediate post and flat horizontal top rail5 Joiner ferrule at top rail6 Flat or angle joiner post7 Base plate8 Thrust plate (if specified)9Thrust plate10 Double pronged feet11 Post suitable for concrete foundation12 Flat horizontals overlapping at end of rail. Rails secured to
49、joiner posts with steel wedges.13 Alternative for driving against kerbs etc14 Alternative corner or end post design15 Enlarged view of typical pronged foot16 Top flat horizontal locked into position at joiner post by 12 4 mm keyway, wedge installed above horizontal17 Detail of ferrule for top round horizontal18 Enlarged view of typical wedge19 Detail of 12 4 mm keyway in top flat horizontal at each junction of intermediate and joiner post (see 6.4.2.2 no
