BS 1722-11-2006 Fences - Specification for prefabricated wood panel fences《栅栏 预制木栅栏用规范》.pdf

1、BS 1722-11:2006Fences Part 11: Specification for prefabricated wood panel fencesICS 91.090NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBRITISH STANDARDPublishing and copyright informationThe BSI copyright notice displayed in this document indicates when the document was last

2、 issued. BSI 2006ISBN 0 580 49508 6The following BSI references relate to the work on this standard:Committee reference B/201Draft for comment 06/30139511 DCPublication historyFirst published November 1965Second edition October 1972Third edition October 1986Fourth edition July 2000Fifith (present) e

3、dition November 2006Amendments issued since publicationAmd. no. Date Text affectedBS 1722-11:2006 BSI 2006 iBS 1722-11:2006ContentsForeword ii1 Scope 12 Normative references 13 Terms and definitions 24 Dimensions and general characteristics 25 Concrete components 26 Timber components 37 Performance

4、and construction 48 Installation 59 Statement of conformity 6AnnexesAnnex A (informative) Specifying a prefabricated wood panel fence 8Annex B (normative) Concrete components 9Annex C (normative) Timber components 11Annex D (informative) Determination of moisture content 13Annex E (normative) Static

5、 load test 14Annex F (informative) Suggested sampling method for measuring the limiting characteristics of timber 17Bibliography 18List of figuresFigure E.1 General layout for static load test 16List of tablesTable C.1 Characteristics and defects of softwoods and hardwoods 12Table D.1 Determination

6、of moisture content of timber to be treated for use in fencing 14Table E.1 Sampling 14Table F.1 Single sampling plans 17Summary of pagesThis document comprises a front cover, an inside front cover, pages i to iv, pages 1 to 18, an inside back cover and a back cover.BS 1722-11:2006ii BSI 2006Foreword

7、Publishing 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 organizations represented on this committee can be obtained on request to its secretary.SupersessionThis part of BS 1722

8、 supersedes BS 1722-11:2000, which is withdrawn.Relationship with other publicationsBS 1722 is published in parts as follows: Part 1: Specification for chain link fences; Part 2: Specification for strained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: Specification for cleft chestnut pale fences; Part

9、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 steel) fences with round or square vertica

10、ls 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: Specification for chain link fences for tennis court surrounds1); Part 14: Sp

11、ecification for open mesh steel panel fences; Part 16: Specification for organic powder coatings for use as a plastics finish to components and mesh; Part 17: Specification for electric security fences Design, installation and maintenance; Part 18: Specification for steel mesh site perimeter tempora

12、ry fencing systems2).Information about this documentIt should be noted that no attempt has been made to standardize fences or gates of a purely decorative nature, or those to suit special requirements; nor to specify requirements for “patent” proprietary fencing systems. However, the structure of su

13、ch fences or gates should be in accordance with the applicable clauses of this part of BS 1722.1)Obsolescent.2)Part 18 is in development and will be published as a Draft for Development (DD). BSI 2006 iiiBS 1722-11:2006This standard aims to establish minimum requirements for materials and workmanshi

14、p of the more common types of fence in order to ensure satisfactory service for the purchaser, and to assist manufacturers and installing contractors by eliminating unnecessary minor variations. Choosing a suitable fence is affected by factors such as the intended purpose, desired service life, aest

15、hetic considerations 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.Premature failure of the fence can be avoided by taking care not to damage protective treat

16、ments during installation.Ground conditions might indicate that a variation in the length of a post, or the depth to 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

17、 a change in the specification, e.g. the ground is softer or firmer than usual, such a change should be agreed with the specifier.It is generally assumed in this standard that the fence is installed on horizontal. Where it is installed on a gradient special measures may be required.Annex A provides

18、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.Use of this documentIt has been assumed in the drafting of this part of BS 1722 that t

19、he 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 operative card

20、 (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 operativ

21、es. 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, explanation and general informative material is pr

22、esented 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, subclause 11.3.1, which states, “Requirements

23、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.BS 1722-11:2006iv BSI 2006Contractual and legal considerationsThis publi

24、cation 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 1722-11:20061 ScopeThis part of BS 1722 specifies requirements for the mater

25、ials, design, construction and installation of prefabricated wood panel fences constructed from softwood panels fixed between timber or concrete posts. This standard does not cover fences of a height greater than 2 m above ground level.This standard includes requirements for protective treatments. H

26、owever, maintenance requirements of the fence after installation are outside the scope of this standard.It specifies requirements for the components that make up a fence and the way in which the fence should be constructed. The standard includes requirements for component dimensions, together with t

27、he permissible tolerances on size. These are minimum requirements 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.NOTE 1 Prefabricated wood panel fences ar

28、e suitable for housing, for dividing boundaries and for visual screens. They are not suitable for fencing which is exposed to animal or personnel loading. They are also not suitable for some very exposed areas such as headlands and high hills liable to abnormally high winds.NOTE 2 Annex A lists item

29、s that should be agreed between the fence supplier and the purchaser.2 Normative referencesThe following normative documents contain provisions which, through reference in this text, constitute provisions of this part of this British Standard. For dated references, subsequent amendments to, or revis

30、ions of, any of these publications do not apply. For undated references, the latest edition of the publication referred to applies.BS 1202-1, Specification for nails Part 1: Steel nailsBS 1722-5:2006, Fences Part 5: Specification for close boarded fences and wooded palisade fencesBS 3892 (all parts)

31、, Pulverized-fuel ashBS 4027, Specification for sulfate resisting Portland cementBS 4449, Specification for carbon steel bars for the reinforcement of concreteBS 4482, Steel wire for the reinforcement of concrete products Specification BS 4483, Steel fabric for the reinforcement of concrete Specific

32、ation BS 8417:2003, Preservation of timber RecommendationsBS EN 197-1, Cement Part 1: Composition, specifications and conformity criteria for common cementsBS EN 197-4, Cement Part 4: Composition, specifications and conformity criteria for low early strength blastfurnace cementsBS 1722-11:20062 BSI

33、2006BS EN 206-1:2000, Concrete Part 1: Specification, performance, production and conformityBS EN 480 (all parts), Admixtures for concrete, mortar and grout Test methodsBS EN 844-9, Round and sawn timber Terminology Part 9: Terms relating to features of sawn timberBS EN 934 (all parts), Admixtures f

34、or concrete, mortar and groutBS EN 12620, Aggregates for concreteBS EN 12839:2001, Precast concrete products Elements for fencesBS EN 12878, Pigments for the colouring of building materials based on cement and/or lime Specifications and methods of testBS EN ISO 1461, Hot dip galvanized coatings on f

35、abricated iron and steel articles Specifications and test methods3 Terms and definitionsFor the purposes of this part of BS 1722, the terms and definitions given in BS EN 844-9 apply.4 Dimensions and general characteristicsThe height of panels shall be as specified by the manufacturer up to a maximu

36、m of (1 830 5) mm at any point.The width of panels shall not exceed 1 830 mm.At the point of manufacture the widths and heights of panels shall not deviate by more than 1 830+5p3mm. The profile of a panel shall be a rectangle, the corners of which shall be 90 2.5 (approximately 12.5 mm in 1 830 mm).

37、 The sides of a panel shall be straight 4 mm. No horizontal member shall protrude beyond the end of the external framing.5 Concrete components5.1 GeneralConcrete posts and gravel boards shall be of steel reinforced concrete conforming to BS EN 12839 and Annex B.5.2 Tolerances on sizeConcrete compone

38、nts shall conform to their specified sizes within the following tolerances:a) a demoulding draw allowance of up to 4 mm on each of two opposing sides;b) length of posts: 1%;c) cross-section: 3 mm;d) length of gravel boards: 5 mm.NOTE The cross-section is measured about the centre lines. BSI 2006 3BS

39、 1722-11:20065.3 General constructionThe long arrises formed in the base of the mould shall either be rounded or all their sharp edges shall be removed. The arrises formed at the top of the mould shall be free from overfill.The heads of posts shall be either weathered or half rounded in order to pre

40、vent lodgement of water.Holes for bolts shall allow the bolt to be freely inserted. All holes shall be free from obstructions and accurately positioned within 5 mm.5.4 Fence postsConcrete posts shall extend to the top of the panel and far enough into the ground to satisfy the requirements of 8.2.Con

41、crete posts shall have a rectangular cross-section of at least 100 mm 85 mm and conform to the specified wind class (see BS EN 12839:2001, 4.3.3). They shall not be tapered.Rectangular posts shall have a minimum of three holes for the attachment of fillets, positioned at centres of not greater than

42、900 mm.Slotted posts shall be provided with slots at least 50 mm wide and approximately 25 mm deep.5.5 Gravel boardsConcrete gravel boards shall have a cross-section of atleast 150 mm 50 mm and shall have a maximum length of 1 830 mm.They shall be reinforced as necessary to give strength in handling

43、.6 Timber components6.1 General6.1.1 MaterialTimber posts shall be of square sawn timber (either hardwood or softwood) conforming to Annex C. Timber used for panels shall be sawn softwood conforming to Annex C.6.1.2 Tolerance of size for posts and gravel boardsTimber components shall conform to thei

44、r specified sizes within the following tolerances.a) An allowance (reduction) on size of 1% for every 5% of moisture content below 28%.NOTE The sizes specified in this standard are for timber with a moisture content of 28% determined in accordance with Annex D.b) Additional deviations on size of oth

45、er components. Under 75 mm: 3 mm. 75 mm and over: 6 mm.NOTE Dimensions of timber components in panels are exclusive of wane; any wane included for decorative purposes is additional to the specified dimensions.BS 1722-11:20064 BSI 20066.2 PostsThe length of timber posts shall be such as to extend to

46、the top of the panel and far enough into the ground to satisfy the requirements of 8.2. Fence posts shall be at least 75 mm 75 mm in cross-section, have the same cross-section throughout their length and be of one continuous piece.6.3 Post capsCaps for posts shall be weathered and cut from timber at

47、 least 25 mm2greater in cross-sectional area than the post.6.4 Gravel boardsGravel boards shall be at least 22 mm 150 mm in cross-section.6.5 PanelsPanels shall have the dimensions given in Clause 4.NOTE Panels may be cut to provide closing panels.6.6 SlatsSlats shall be at least 5 mm thick.7 Perfor

48、mance and construction7.1 LoadingWhen tested according to Annex E panels shall withstand the full test load for a period of at least 3 min without any splitting or fracturing of the timber components and without any visible parting of any of the joints or intersections of the framing.NOTE This test

49、simulates a wind load of 0.65 kN/m at 90 to the line of the fence. No consideration has been given to personnel loading as this type of fencing is not considered suitable for use in conditions where such loading occurs.7.2 Life expectancy Treatment for timber postsTimber posts shall be preserved in accordance with the appropriate recommendations for fencing timber given in BS 8417.NOTE 1 Under normal conditions the life expectancy of the panel should be 15 y