1、BS 1722-9:2006Fences Part 9: Specification for mild steel (low carbon steel) fences with round or square verticals and flat horizontalsICS 91.090NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBRITISH STANDARDPublishing and copyright informationThe BSI copyright notice displaye
2、d in this document indicates when the document was last issued. BSI 2006ISBN 0 580 49506 XThe following BSI references relate to the work on this standard:Committee reference B/201Draft for comment DC06/30139507Publication historyFirst published October 1951Second edition April 1953Third edition Feb
3、ruary 1979Fourth edition December 1992Fifth edition July 2000Sixth (present) edition November 2006Amendments issued since publicationAmd. no. Date Text affectedBS 1722-9:2006 BSI 2006 iBS 1722-9:2006ContentsForeword ii1 Scope 12 Normative references 13 Dimensional and general characteristics 24 Mate
4、rials 25 Construction of gates 86 Installation 137 Statement of conformity 13AnnexesAnnex A (informative) Specifying a vertical bar fence 15Bibliography 17List of figuresFigure 1 Typical fence with round and square verticals and flat horizontals 5Figure 2 Examples of typical hinge profiles 10List of
5、 tablesTable 1 Recommended steel grades 2Table 2 Dimensions for bow top fences 7Table 3 Dimensions for round or square bar square to view fences 7Table 4 Dimensions for square bar angle to view fences 8Table 5 Vertical bar Minimum gate specification 12Summary of pagesThis document comprises a front
6、cover, an inside front cover, pages i to iv, pages 1 to 17 and a back cover.BS 1722-9:2006ii BSI 2006ForewordPublishing informationThis part of BS 1722 was published by BSI and came into effect on 30 November 2006. It was prepared by Technical Committee B/201, Fences and Gates. A list of organizatio
7、ns represented on this committee can be obtained on request to its secretary.SupersessionThis part of BS 1722-9 supersedes BS 1722-9:2000, which is withdrawn.Relationship with other publicationsBS 1722 is published in parts as follows: Part 1: Specification for chain link fences Part 2: Specificatio
8、n for strained wire and wire mesh netting fences Part 4: Specification for cleft chestnut pale fences Part 5: Specification for close-boarded fences and wooden palisade fences Part 7: Specification for wooden post and rail fences Part 8: Specification for mild steel (low carbon steel) continuous bar
9、 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 Part 11: Specification for prefabricated wood panel fences Part 12: Specification for s
10、teel palisade fences Part 13: Specification for chain link fences for tennis court surrounds 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: Electric security fences. Design,
11、 installation and maintenance Specification Part 18: Specification for steel mesh site perimeter temporary fencing systems 2)1)Obsolescent.2)Part 18 is in development and will be published as a Draft for Development (DD). BSI 2006 iiiBS 1722-9:2006Information about this documentThe various parts spe
12、cify requirements for the types of fence that are considered suitable for standardization. No attempt has been made to standardize fences or gates of a purely decorative nature, nor to specify requirements for “patent” proprietary fencing systems. It is recommended, however, that such fences or gate
13、s should be designed in accordance with the relevant clauses of this part of BS 1722.This new edition represents a full revision of the standard, and introduces the following principal changes:a) the removal of flat posts from the standard, the inclusion of RHS posts;b) removal of requirements for a
14、ngle corner posts, which in this edition are specified as for line posts;c) revision of the requirements for gates. The opportunity has also been taken to simplify the construction and installation requirements in line with current practice.It has been assumed in the drafting of this part of BS 1722
15、 that the execution of its provision 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 operatives should hold the basic fence operati
16、ve card (green card) or equivalent.At the time of publication of this British Standard the registration cards are validated by the Joint Fencing Industry Skills Scheme (FISS) and Construction Scheme Skills Certification Scheme (CSCS). FISS/CSCS maintains a national register of fence installers and o
17、peratives. There might be other schemes available. This 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, and to assist manufacturers and installers by eliminating unnecessary min
18、or variations in the demands of purchasers. It specifies requirements for the components that make up a fence and the way in which the fence needs to be constructed. The standard includes requirements for sizes of components, together with the permissible tolerances on size. These are minimum requir
19、ements and it will normally be acceptable to use larger sizes, except if this could adversely affect the fitting of components or if replacement parts are required to match with those already present.Choosing a fence is affected by factors such as intended purpose, desired service life, aesthetic co
20、nsiderations and availability of components. The specifier can match a suitable choice of fence to its intended purpose and also inform those installing the fence of the basic characteristics required. This standard includes requirements for protective treatment. However, maintenance requirements of
21、 the fence after installation are outside the scope of this standard. Premature failure of the fence can be avoided by taking care not to damage protective treatments during installation.BS 1722-9:2006iv BSI 2006Ground conditions can indicate that a variation in the length of a post, or the depth to
22、 which it should be set, is desirable. The post setting depths specified in this standard are intended for use in normal ground conditions, but if special conditions exist that warrant a change in the specification, e.g. the ground is softer or firmer than usual, such a change should be agreed with
23、the specifier.It is generally assumed in this standard that the fence is installed on horizontal ground. Where it is installed on a gradient, special measures can be required.It should be noted that throughout this part of BS 1722 the fence post spacings are given in terms of centre distances. It sh
24、ould also be noted that, while 110 mm spacing (as clear space, not between centres) “general purpose fencing” is common, local authorities often test for a 100 mm clear space.This standard specifies requirements for fence materials and their combination and installation to provide a serviceable fenc
25、e. Because a fence is made up of a number of separate components, of which the particular features can vary, a number of permissible combinations are available to the user. When preparing a specification for a fence it is therefore important to give precise details of the requirements of the fence a
26、nd of the site. Annex A provides details of the fence requirements and installation site that should be agreed between the fence supplier and purchaser. However, as conditions vary from site to site, Annex A should not be assumed to be exhaustive.Annex A is informative. Presentational conventionsThe
27、 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, explanation and general informative material is presented in smaller italic type, and does not constitute a normative elem
28、ent.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, subclause 11.3.1, which states, “Requirements should be expressed using wording such as: When tested as described in A
29、nnex 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 considerationsThis publication does not purport to include all the necessary provisions of a contract. Users are responsib
30、le for its correct application.Compliance with a British Standard cannot confer immunity from legal obligations. BSI 2006 1BS 1722-9:20061 ScopeThis part of BS 1722 specifies requirements for self-adjusting (nibbed) or welded mild steel (low carbon steel) fences with round or square verticals and ro
31、lled hollow section (RHS) or rolled steel joist (RSJ) posts and flat horizontals. It also specifies requirements for their installation.Maintenance of the fence after installation is outside the scope of this standard.2 Normative referencesThe following normative documents contain provisions which,
32、through reference in this text, constitute provisions of this part of this British Standard. For dated references, subsequent amendments to, or revisions of, any of these publications do not apply. For undated references, the latest edition of the publication referred to applies.BS 8500-1:2002, Conc
33、rete Complementary British Standard to BS EN 206-1 Part 1: Method of specifying and guidance for the specifier BS 8500-2:2002, Concrete Complementary British Standard to BS EN 206-1 Part 2: Specification for constituent materials and concreteBS EN 12620, Aggregates for concreteBS EN ISO 1461, Hot di
34、p galvanized coatings on fabricated iron and steel articles Specifications and test methodsBS EN ISO 2063:2005, Thermal spraying Metallic and other inorganic coatings Zinc, aluminium and their alloysBS EN 10058:2003, Hot rolled flat steel bars for general purposes Dimensions and tolerances on shape
35、and dimensionsBS EN 10059:2003, Hot rolled square steel bars for general purposes Dimensions and tolerances on shape and dimensionsBS EN 10060:2003, Hot rolled round steel bars for general purposes Dimensions and tolerances on shape and dimensionsBS EN 10210-2:2006, Hot finished structural hollow se
36、ctions of non-alloy and fine grain steels Part 2: Tolerances, dimensions and sectional propertiesBS EN 10219-1:2006, Cold formed welded structural hollow sections of non-alloy and fine grain steels Part 1: Technical delivery conditionsBS EN 10025-2:2004, Hot rolled products of structural steels Part
37、 2: Technical delivery conditions for non-alloy structural steelsBS 1722-9:20062 BSI 20063 Dimensional and general characteristicsExcept for make-up purposes, panels shall be 2.72 m long. The dimensions of the metal sections for vertical bar fences and the centre to centre distance between verticals
38、 shall be as shown in Tables 2, 3 and 4.4 Materials4.1 SteelThe steel grade(s) employed for the production of fences and gates shall be specified by the customer (the purchaser, fence designer, supplier, component manufacturer, fabricator or erector, as applicable), on the basis of the mechanical pr
39、operties, formability and weldability required. Appropriate mild steel grades shall be selected from National or International Standards or suitable equivalent proprietary materials can be used.Steel used in the construction of fences shall conform to designation S235JR of BS EN 10025:2000 or equiva
40、lent. Where components are to be hot dipped galvanized, the purchaser shall confirm with the supplier that the steel composition is suitable. NOTE A non-exhaustive range of recommended material grades is given in Table 1.Table 1 Recommended steel gradesMaterial Dimensional standard Material standard
41、 Material grade A)Flat bar BS EN 10058 BS EN 10025-2 S185 / S235JRSquare bar BS EN 10059 BS EN 10025-2 S185 / S235JRRound bar BS EN 10060 BS EN 10025-2 S185 / S235JRFlat bar BS EN 10058 BS EN 10025-2 S185 / S235JRSquare bar BS EN 10059 BS EN 10025-2 S185 / S235JRRound bar BS EN 10060 BS EN 10025-2 S
42、185 / S235JRRectangular hollow sections (RHS) BS EN 10210-2 BS EN 10210-1 S235JRHBS EN 10219-2 BS EN 10219-1 S235JRHPlate for baseplates, caps, etc.BS EN 10025-2 S185 / S235JRA)Higher strength or more enhanced grades than those shown can be used, provided that they meet the necessary requirements fo
43、r formability, weldability or galvanizing. BSI 2006 3BS 1722-9:20064.2 Construction4.2.1 Self-adjusting fencesSelf-adjusting fences shall be manufactured so that when the vertical bars are passed through holes in the horizontals each vertical is held in place by mechanically formed nibs and/or other
44、 permanent means of fixing.4.2.2 Welded fencesWelded panels shall be manufactured by passing the vertical bars through holes in the top horizontal and welding their bottom and top ends to the horizontals. The length of weld shall be a minimum of 50% of the perimeter of the bar.NOTE The weld can be e
45、ither above or below the horizontals.4.3 ComponentsNOTE The components involved in the production of a typical fence are illustrated in Figure 1.4.3.1 VerticalsThe cross section and orientation of the fence line shall be in accordance with Tables 2, 3 and 4.In self-adjusting panels the verticals sha
46、ll extend 75 mm below the bottom horizontal.Verticals shall be bow top, pointed top, domed top, blunt top or have ornamental heads.NOTE Pointed tops afford the greatest deterrent but are not recommended for use on fences less than 1.80 m high.The spacing of verticals and the number per panel shall b
47、e in accordance with Tables 2, 3 and 4. Verticals shall be set symmetrically in panels so that the spacing at each end is equal.4.3.2 PostsPosts shall have the cross-sections shown in Tables 2, 3 and 4 and shall be sealed with a cap at the top.4.3.3 HorizontalsFor fences up to 1.00 m in height, the
48、position of the horizontal rail shall be 130 mm 5 mm from the top of the fence. For fences over 1.00 m in height and up to 1.50 m in height, the position of the horizontal rail shall be 150 mm 5 mm from the top of the fence. For fences over 1.50 m in height, the position of the horizontal rail shall
49、 be 200 mm 5 mm from the top of the fence.NOTE Adjustments might be necessary if ornamental heads are used.The bottom of the fence shall give an average ground clearance of 75 mm 5 mm.Horizontals shall be joined at the posts with fish plates or cleats and minimum 10-mm bolts.BS 1722-9:20064 BSI 20064.3.4 SupportsIf fencing is fixed in the ground, the support cross section shall not exceed 10 mm less than the horizontal width, e.g. 50 10 horizontal, 40 10 mm cross section.
