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1、BRITISH STANDARD BS EN 12839:2001 Precast concrete products Elements for fences The European Standard EN 12839:2001 has the status of a British Standard ICS 91.090; 91.100.30 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW Licensed Copy: sheffieldun sheffieldun, na, Sat Oct 28
2、 09:30:00 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN 12839:2001 This British Standard, having been prepared under the direction of the Sector Policy and Strategy Committee for Building and Civil Engineering, was published under the authority of the Standards Policy and Strategy Committee on 26
3、 September 2001 BSI 26 September 2001 ISBN 0 580 37342 8 National foreword This British Standard is the official English language version of EN 12839:2001. This European Standard is the subject to transitional arrangements agreed under a Commission mandate, which is intended to lead to CE marking in
4、 support of the Construction Products Directive. In order to allow for any changes in national regulations, the Member States have agreed a transition period of 21 months before CE marking becomes effective. Attention is drawn to the provisions given in the BS 1722 series, which will be reviewed in
5、the light of this standard. The UK participation in its preparation was entrusted to Technical Committee B/524, Precast concrete products, which has the responsibility to: A list of organizations represented on this committee can be obtained on request to its secretary. Cross-references The British
6、Standards which implement international or European publications referred to in this document may be found in the BSI Standards Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Find” facility of the BSI Standards Electronic Catalogue. A British St
7、andard 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. aid enquirers to understand the text; present to the
8、responsible European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; monitor related international and European developments and promulgate them in the UK. Summary of pages This document comprises a front cover, an inside front cover, the E
9、N title page, pages 2 to 49 and a back cover. The BSI copyright date displayed in this document indicates when the document was last issued. Amendments issued since publication Amd. No. DateComments Licensed Copy: sheffieldun sheffieldun, na, Sat Oct 28 09:30:00 GMT+00:00 2006, Uncontrolled Copy, (c
10、) BSI EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 12839 May 2001 ICS 91.090; 91.100.30 English version Precast concrete products Elements for fences Produits prfabriqus en bton Elments pour clturesVorgefertigte Betonerzeugnisse Betonelemente fr Zune This European Standard was approved by CE
11、N on 2 March 2001. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards m
12、ay be obtained on application to the Management Centre or to any CEN member. This European Standard exists in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CEN member into its own language and notified to the Mana
13、gement Centre has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom.
14、 EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: rue de Stassart, 36 B-1050 Brussels 2001 CENAll rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 12839:2001 E Licensed
15、Copy: sheffieldun sheffieldun, na, Sat Oct 28 09:30:00 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 12839:2001 2 Contents Page Foreword. 3 1Scope . 4 2Normative references .4 3Terms and definitions.4 4Requirements 7 5Test methods. 15 6Evaluation of conformity24 7Marking and labelling .28 Annex A (i
16、nformative) Basic types of fences Terminology. 29 Annex B (normative) Index of references for surface finish as cast Reference photographs used to appreciate the incidence of blownotes in surfaces. 35 Annex C (informative) Factory production control procedures. 39 Annex D (informative) Acceptance te
17、sting of a consignment at delivery 42 Annex E (normative) Test of water absorption .44 Annex ZA (informative) Clauses of this European Standard addressing the provisions of the EU Construction Products Directive.45 Bibliography. 49 Licensed Copy: sheffieldun sheffieldun, na, Sat Oct 28 09:30:00 GMT+
18、00:00 2006, Uncontrolled Copy, (c) BSI EN 12839:2001 3 Foreword This European Standard has been prepared by Technical Committee CEN/TC 229, Precast concrete products, the Secretariat of which is held by AFNOR. This European Standard shall be given the status of a national standard, either by publica
19、tion of an identical text or by endorsement, at the latest by November 2001, and conflicting national standards shall be withdrawn at the latest by February 2003. This European Standard has been prepared under a mandate given to CEN by the European Commission and the European Free Trade Association,
20、 and supports essential requirements of EC Directive(s). For relationship with EC Directive(s), see informative annex ZA, which is an integral part of this standard. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implem
21、ent this European Standard: Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom. Licensed Copy: sheffieldun sheffieldun, na, Sat Oct 28 09:30:00 GMT+00:00 20
22、06, Uncontrolled Copy, (c) BSI EN 12839:2001 4 1 Scope This European Standard covers prefabricated concrete elements (in reinforced or prestressed concrete) which can be used together or in combination with other elements to erect fences e.g. boundary fences. The intended uses may be nonstructural o
23、r lightly structural. The current concrete elements include posts, solid or open panels, slabs, rails, spurs, struts and base panels. It provides for the evaluation of conformity of elements to this European Standard. Marking conditions are included. NOTE Annex A intends to provide information on th
24、e possible types of fences in which these elements may be part of. 2 Normative references This European Standard incorporates by dated or undated reference, provisions from other publications. These normative references are cited at the appropriate places in the text and the publications are listed
25、hereafter. For dated references, subsequent amendments to or revisions of any of these publications apply to this European Standard only when incorporated in it by amendment or revision. For undated references the latest edition of the publication referred to applies (including amendments). EN 206-1
26、:2000, Concrete Performance, production and conformity. EN 12350-1, Testing fresh concrete Part 1: Sampling. EN 12390-1, Testing hardened concrete Part 1: Shape, dimensions and other requirements for specimens and moulds. EN 12390-2, Testing hardened concrete Part 2: Making and curing specimens for
27、strength tests. prEN 12390-3:2001, Testing hardened concrete Part 3: Compressive strength of test specimens. EN 12390-4, Testing hardened concrete Part 4: Compressive strength Specification for testing machine. 3 Terms and definitions For the purposes of this European Standard, the following terms a
28、nd definitions apply: 3.1 Types of fences Annex A provides illustrations of typical fences. 3.1.1 solid fence fence made of posts and solid panels or cladding 3.1.2 open-work fence fence made of posts and open-work panels possibly including solid panels Licensed Copy: sheffieldun sheffieldun, na, Sa
29、t Oct 28 09:30:00 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 12839:2001 5 3.1.3 mesh or wire fence fence made of posts and woven or welded wire mesh, and/or wires 3.1.4 mixed fence fence made of posts and a combination of different elements with at least one base panel 3.1.5 rail fence fence made
30、 of posts and rails 3.1.6 anti-intruder fence mesh fence, solid fence or mixed fence with an enhanced level of security provided by the addition of barbed wire, barbed tape or similar attached to posts with cranked or vertical extensions 3.2 Post vertical element of reinforced or prestressed concret
31、e, intended to be buried or fastened at its base NOTE This element is designed to accommodate solid or open-work panels and/or rails, meshes or wires. 3.2.1 intermediate post post used in the fence line, interposed between ends, direction changes and straining points (if any) 3.2.2 accessory post po
32、st shaped and designed to provide a particular function 3.2.2.1 corner post post used at a change of direction 3.2.2.2 end post post used at the extremity of a fence line 3.2.2.3 straining post post from which tension wires are stretched, with or without struts (e.g. end-straining post, corner post,
33、 intermediate straining post) 3.2.2.4 gate post post used to support a gate 3.3 Rail horizontal element of reinforced or prestressed concrete, connected to and supported by the post NOTE Rails for sports grounds are distinguished from other types of rails. Licensed Copy: sheffieldun sheffieldun, na,
34、 Sat Oct 28 09:30:00 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 12839:2001 6 3.4 Panel 3.4.1 solid panel panel of reinforced concrete 3.4.2 open-work panel panel with regular or varied open-work patterns 3.4.3 base panel panel of reinforced concrete used between posts at ground level 3.5 Spur sho
35、rt post intended to support a fence post made with a material other than concrete 3.6 Strut element designed to provide support to post carrying horizontal loads 3.7 Dimension 3.7.1 work dimension dimension specified by the manufacturer and generally complying with the dimension indicated in the pro
36、ject or in the manufacturer technical documentation NOTE The design height of the posts for solid fences is the height of the solid part of the fence. 3.7.2 actual dimension dimension found by measurements 3.8 Surface finish 3.8.1 surface finish as cast surface finish obtained at demoulding, if nece
37、ssary after surfacing or finishing 3.8.2 surface finish treated surface finish obtained after complementary treatment on the concrete in fresh state or in hardened state 3.9 Heat treatment process of heating the fresh concrete in order to accelerate cement hydration where the temperature of the conc
38、rete after compaction is above 45 C or is in excess of 25 C above the ambient temperature 3.10 Loadbearing capacity loadbearing capacity is the ability of an element to resist a maximum failure load Licensed Copy: sheffieldun sheffieldun, na, Sat Oct 28 09:30:00 GMT+00:00 2006, Uncontrolled Copy, (c
39、) BSI EN 12839:2001 7 3.11 Complementary loadbearing capacity complementary loadbearing capacity is the ability of an element to resist a defined load under service conditions and a defined failure load 4 Requirements 4.1 Material requirements Only materials with established suitability shall be use
40、d. For a material, the establishment of suitability may result from a European Standard that refers specifically to the use of this material in concrete or in concrete products; it may also result, under the same conditions, from an ISO Standard. Where this material is not covered by a European or I
41、SO Standard, or if it deviates from the requirements of these standards, the establishment of suitability may result from: ? the relevant national standards or provisions valid in the place of use of the product which refers specifically to the use of this material in concrete or in concrete product
42、s; or ? a European Technical approval specifically to the use of this material in concrete or concrete products. For new materials, where none of the above requirements can be satisfied, the properties shall be documented by theoretical and/or experimental evaluation. 4.2 Production requirements 4.2
43、.1 Concrete production 4.2.1.1 Composition 4.2.1.1.1 Use of admixtures The total amount of admixtures, if any, shall not exceed the maximum dosage recommended by the admixture producer and not exceed 50 g/kg cement except where higher amounts of admixtures are necessary in special cases, e.g. for hi
44、gh strength concrete. The influence of the higher dosage on the performance and the durability of the concrete shall be considered. Admixtures used in quantities less than 2 g/kg cement are only permitted if they are dispersed in part of the mixing water. If the total quantity of liquid admixtures e
45、xceeds 3 l/m3 of concrete, its water content shall be taken into account when calculating the water/cement ratio. The compatibility of the admixtures shall be checked in the initial tests where more than one admixture is used. 4.2.1.1.2 Chloride content For chloride content EN 206-1:2000, 5.2.7 appl
46、ies. Licensed Copy: sheffieldun sheffieldun, na, Sat Oct 28 09:30:00 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 12839:2001 8 4.2.1.1.3 Resistance to alkali-silica reaction Where aggregates contain varieties of silica susceptible to attack by alkalis (Na2O and K2O originating from cement or other
47、sources) and if the product is exposed to humid conditions, special precautions in the choice of constituents shall be taken. 4.2.1.2 Concrete temperature The temperature of fresh concrete shall not be less 5 C at the time of placing. 4.2.1.3 Curing All surfaces of newly cast element shall be protec
48、ted against drying out if necessary. 4.2.1.4 Heat treatment Where heat treatment (see 3.9) is applied to concrete in order to accelerate its hardening, it shall be demonstrated by initial test that the required strength is achieved for each concrete batch. 4.2.1.5 Early compressive strength of concr
49、ete for prestressed products The minimum compressive strength at transfer of the prestress force shall be 25 N/mm2. 4.2.2 Hardened concrete 4.2.2.1 Compressive strength Under the test conditions defined in 5.5, the characteristic compressive strength of concrete for the fractile 0,05 1), after a 28 days hardening, shall be at least equal to the values given in Table 1. Moreover no specimen shall have a compressive strength less than 0,8 times the characteristic value. Table 1 Characteristic compressive strength ConcreteReinfor