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1、BRITISH STANDARD BS EN 491:2004 Incorporating Corrigendum No. 1 Concrete roofing tiles and fittings for roof covering and wall cladding Test methods The European Standard EN 491:2004 has the status of a British Standard ICS 91.100.30 ? Licensed Copy: sheffieldun sheffieldun, na, Sat Nov 04 09:28:29
2、GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN 491:2004 This British Standard was published under the authority of the Standards Policy and Strategy Committee on 18 January 2005 BSI 12 December 2005 ISBN 0 580 45377 4 National foreword This British Standard is the official English language version
3、 of EN 491:2004, including Corrigendum March 2005. It supersedes BS EN 491:1994 which is withdrawn. The UK participation in its preparation was entrusted by Technical Committee B/542, Roofing and cladding products for discontinuous laying, to Subcommittee B/542/2, Concrete roofing tiles and fittings
4、, which has the responsibility to: A list of organizations represented on this subcommittee can be obtained on request to its secretary. Cross-references The British Standards which implement international or European publications referred to in this document may be found in the BSI Catalogue under
5、the section entitled “International Standards Correspondence Index”, or by using the “Search” facility of the BSI Electronic Catalogue or of British Standards Online. This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct applic
6、ation. Compliance with a British Standard does not of itself confer immunity from legal obligations. aid enquirers to understand the text; present to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep UK interests informed; monitor
7、 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 EN title page, pages 2 to 21 and a back cover. The BSI copyright notice displayed in this document indicates when the document was last i
8、ssued. Amendments issued since publication Amd. No. DateComments 15834 Corrigendum No. 1 12 December 2005 Renumbering of Figures 27 Licensed Copy: sheffieldun sheffieldun, na, Sat Nov 04 09:28:29 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 491 Dece
9、mber 2004 ICS 91.100.30 Supersedes EN 491:1994 English version Concrete roofing tiles and fittings for roof covering and wall cladding - Test methods Tuiles et accessoires en bton pour couverture et bardage - Mthodes dessais Dach- und Formsteine aus Beton fr Dcher und Wandbekleidungen - Prufverfahre
10、n This European Standard was approved by CEN on 20 October 2004. 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 r
11、eferences concerning such national standards may be obtained on application to the Central Secretariat 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 membe
12、r into its own language and notified to the Central Secretariat has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithu
13、ania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: rue de Stassart, 36 B-1050 Brussels 2004 CEN All
14、rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 491:2004: EInn Incorporating Corrigendum November 2005 Licensed Copy: sheffieldun sheffieldun, na, Sat Nov 04 09:28:29 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 491:2004 (E) 2 Contents pa
15、ge Foreword4 1 Scope 5 2 Normative references5 3 Terms and definitions .5 4 Symbols and abbreviations5 5 Test methods5 5.1 General5 5.2 Hanging length and squareness of regular front edge tiles .5 5.2.1 Principle5 5.2.2 Apparatus .6 5.2.3 Procedure .6 5.2.4 Expression of results 7 5.2.5 Test report7
16、 5.3 Cover width 7 5.3.1 Principle7 5.3.2 Apparatus .7 5.3.3 Procedure .7 5.3.4 Expression of results 8 5.3.5 Test report9 5.4 Flatness 9 5.4.1 Principle9 5.4.2 Apparatus .10 5.4.3 Procedure .11 5.4.4 Expression of results 11 5.4.5 Test report11 5.5 Mass11 5.5.1 Principle11 5.5.2 Apparatus .11 5.5.3
17、 Conditioning.11 5.5.4 Procedure .11 5.5.5 Expression of results 11 5.5.6 Test report11 5.6 Mechanical resistance (transverse strength) .12 5.6.1 Principle12 5.6.2 Apparatus .12 5.6.3 Conditioning of tiles13 5.6.4 Procedure .13 5.6.5 Recording of test results 15 5.6.6 Test report15 5.7 Water imperme
18、ability 15 5.7.1 Principle15 5.7.2 Apparatus and materials.15 5.7.3 Conditioning.16 5.7.4 Procedure .17 5.7.5 Expression of results 17 5.7.6 Test report17 5.8 Freezethaw resistance 17 Licensed Copy: sheffieldun sheffieldun, na, Sat Nov 04 09:28:29 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 491:20
19、04 (E) 3 5.8.1 Principle17 5.8.2 Apparatus.17 5.8.3 Preparation of test samples .17 5.8.4 Procedure.18 5.8.5 Expression of results18 5.8.6 Test report19 5.9 Nib support 19 5.9.1 Principle19 5.9.2 Apparatus.19 5.9.3 Procedure.19 5.9.4 Expression of results19 5.9.5 Test report19 Bibliography21 License
20、d Copy: sheffieldun sheffieldun, na, Sat Nov 04 09:28:29 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 491:2004 (E) 4 Foreword This document (EN 491:2004) has been prepared by Technical Committee CEN/TC 128 “Roof covering products for discontinuous laying and products for wall cladding”, the secreta
21、riat of which is held by IBN. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by June 2005, and conflicting national standards shall be withdrawn at the latest by September 2006. This document supers
22、edes EN 491:1994. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland,
23、 Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. Licensed Copy: sheffieldun sheffieldun, na, Sat Nov 04 09:28:29 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 491:2004 (E) 5 1 Scope This document s
24、pecifies test methods for concrete roofing tiles and fittings conforming to EN 490, for assembly into pitched roof covering or external wall cladding or internal wall lining cladding. 2 Normative references The following referenced documents are indispensable for the application of this document. Fo
25、r dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN 490:2004, Concrete roofing tiles and fittings for roof covering and wall cladding Product specifications. 3 Terms and definitions For the p
26、urposes of this document, the terms and definitions given in EN 490:2004 apply. 4 Symbols and abbreviations l1 hanging length of a tile as defined in Figure 1a) and 1c), in millimetres; l2,l3 hanging edge lengths of a tile as defined in Figure 1.b), in millimetres; cw nominal cover width of one tile
27、, in millimetres; cwc cover width closed up value of 10 tiles, in millimetres; cwd cover width drawn out value of 10 tiles, in millimetres; d profile depth of a tile, in millimetres; x angle at which test tiles are hung as defined in Figure 1a), in degrees. 5 Test methods 5.1 General Where other tes
28、t methods are used for factory production control (FPC) a satisfactory statistical correlation with the test methods specified in this document shall be demonstrated. 5.2 Hanging length and squareness of regular front edge tiles 5.2.1 Principle Tiles are hung from steel battens and measured to estab
29、lish hanging length and also the squareness of regular front edge tiles. Licensed Copy: sheffieldun sheffieldun, na, Sat Nov 04 09:28:29 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 491:2004 (E) 6 5.2.2 Apparatus Steel battens to support the tile (see Figure 1). l1 X a) x = 20 to 70 l2 l3 b) Tiles
30、with nominally constant hanging length l1 = (l2 + l3)/2 l1 c) Tiles with regularly varying hanging length l1 = Hanging length measured at lowest point Figure 1 Test method for hanging length 5.2.3 Procedure 5.2.3.1 Tiles with nominally constant hanging length Hang the tile at an angle of 20 to 70 on
31、 a steel batten (see Figure 1a). After physically removing any burrs and/or other irregularities, measure from the top face of the batten to the lower front edge of the tile at the sides (see Figure 1b), excluding the interlocking sections in the case of tiles with sidelocks. Licensed Copy: sheffiel
32、dun sheffieldun, na, Sat Nov 04 09:28:29 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 491:2004 (E) 7 5.2.3.2 Tiles with regularly varying hanging length Hang the tile at an angle of 20 to 70 on a steel batten (see Figure 1a). After physically removing any burrs and/or other irregularities, measure
33、from the top face of the batten to the lowest point of the tile (see Figure 1c). 5.2.4 Expression of results 5.2.4.1 Tiles with nominally constant hanging length Record the values l2 and l3 to the nearest millimetre and calculate the average per tile l1 to the nearest millimetre. 5.2.4.2 Tiles with
34、regularly varying hanging length Record the measured value l1 to the nearest millimetre. 5.2.5 Test report 5.2.5.1 Tiles with nominally constant hanging length The test report shall include the following: a) value l2 to the nearest millimetre; b) value l3 to the nearest millimetre; c) the average pe
35、r tile. l1. to the nearest millimetre; d) reference to this document, i.e. EN 491. 5.2.5.2 Tiles with regularly varying hanging length The test report shall include the following: a) value l1 to the nearest millimetre; b) reference to this document, i.e. EN 491. 5.3 Cover width 5.3.1 Principle Tiles
36、 are hung or laid on a steel batten to determine their cover width. 5.3.2 Apparatus Steel batten to support the tile (see Figure 1). 5.3.3 Procedure 5.3.3.1 Interlocking tiles Hang or lay 11 tiles of the same nominal cover width with their locks engaged, following the manufacturers recommendations.
37、Licensed Copy: sheffieldun sheffieldun, na, Sat Nov 04 09:28:29 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 491:2004 (E) 8 Taking care that the interlocking parts of the tiles do not lift or disengage, pull the tiles apart to their maximum coverage. Measure the drawn-out value cwd over 10 tiles to
38、 the nearest millimetre (see Figure 2a). Taking care that the interlocking parts of the tiles do not lift or disengage, push the tiles together to their minimum coverage. Measure the closed up value cwc over 10 tiles to the nearest millimetre (see Figure 2b). cwd a) cwd = cover width of 10 tiles dra
39、wn out cwc b) cwd = cover width of 10 tiles closed up Figure 2 Testing interlocking tiles 5.3.3.2 Non-interlocking tiles Hang or lay 10 tiles of the same nominal cover width on a batten following the manufacturers recommendations. Push the tiles together. Measure the width of the 10 tiles to the nea
40、rest millimetre. 5.3.4 Expression of results 5.3.4.1 Interlocking tiles Calculate to the nearest millimetre either: a) the mean drawn out value cwd/10 and the mean closed up value cwc/10; or b) the mean cover width (cwd + cwc)/20. 5.3.4.2 Non-interlocking tiles Calculate the mean cover width cwc/10
41、to the nearest millimetre. Licensed Copy: sheffieldun sheffieldun, na, Sat Nov 04 09:28:29 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 491:2004 (E) 9 5.3.5 Test report 5.3.5.1 Interlocking tiles The test report shall include the following: a) the mean drawn out value cwd/10 and the mean closed up
42、value cwc/10 to the nearest millimetre; or b) the mean cover width (cwd + cwc)/20 to the nearest millimetre; and c) reference to this document, i.e. EN 491. 5.3.5.2 Non-interlocking tiles The test report shall include the following: a) the mean cover width cw to the nearest millimetre; b) reference
43、to this document, i.e. EN 491. 5.4 Flatness 5.4.1 Principle Tiles are laid on a flat plate to determine their flatness. Licensed Copy: sheffieldun sheffieldun, na, Sat Nov 04 09:28:29 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 491:2004 (E) 10 5.4.2 Apparatus 5.4.2.1 A flat metal surface or two co
44、-planer flat metal plates (see Figure 3). Dimensions in millimetres 1 3 2 3 Key 1 Flat surface 3 Diameter 3 mm or cw/100 2 Two co-planer flat metal plates Figure 3 Testing flatness 5.4.2.2 Steel round bar, with a diameter of 3 mm or cw/100 mm to the nearest millimetre, whichever is the greater. Lice
45、nsed Copy: sheffieldun sheffieldun, na, Sat Nov 04 09:28:29 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 491:2004 (E) 11 5.4.3 Procedure Place the tile on a flat level surface or two co-planer flat metal bars with the nibs projecting, as shown in Figure 3. Hold the tile to ensure that the head of t
46、he tile is in contact with the surface. Using the steel bar (without lifting the tile), check whether any gap between the lower front edge of the tile and the measuring surface at any nominal contact point, is greater than the diameter of the steel bar. 5.4.4 Expression of results Record for each ti
47、le whether there is a gap equal to or greater than the diameter of the steel bar. 5.4.5 Test report The test report shall include the following: a) the number of tiles for which there is a gap equal to or greater than the diameter of the steel bar; b) reference to this document, i.e. EN 491. 5.5 Mas
48、s 5.5.1 Principle Tiles are conditioned and then weighed to determine their mass. 5.5.2 Apparatus Weighing device, capable of measuring to the nearest 25 g. 5.5.3 Conditioning Store the tiles to be tested at 15 C to 30 C and at a minimum of 30 % relative humidity for at least 24 h in such a manner t
49、hat air is free to circulate to all sides of each tile. 5.5.4 Procedure Weigh each tile to the nearest 25 g. 5.5.5 Expression of results Record the values measured and calculate the mean mass of the tiles in the sample to the nearest 25 g. 5.5.6 Test report The test report shall include the following: a) the mass of each tile to the nearest 25 g; b) the mean mass of the tiles in the sample to the nearest 25 g; c) reference to this document, i.e. EN 491. Licensed Copy: shef
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