1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationBS EN 491:2011Concrete roofing tiles andfittings for roof covering andwall cladding Test methodsCopyright European Committee for Standardization Provided by IHS under license wit
2、h CENNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-BS EN 491:2011 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of EN 491:2011. Itsupersedes BS EN 491:2004 which is withdrawn.The UK participation in its preparation was entrusted
3、to TechnicalCommittee B/542/2, Concrete roofing tiles and fittings.A list of organizations represented on this committee can beobtained on request to its secretary.This publication does not purport to include all the necessaryprovisions of a contract. Users are responsible for its correctapplication
4、. The British Standards Institution 2012ISBN 978 0 580 73801 2ICS 91.100.30Compliance with a British Standard cannot confer immunity fromlegal obligations.This British Standard was published under the authority of theStandards Policy and Strategy Committee on 31 January 2012.Amendments issued since
5、publicationDate Text affectedCopyright European Committee for Standardization Provided by IHS under license with CENNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-BS EN 491:2011EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 491 September 2011 ICS 91.100.30 S
6、upersedes EN 491:2004English 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 - Prfverfahren This European Standard was
7、 approved by CEN on 4 August 2011. 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 nati
8、onal standards may be obtained on application to the CEN-CENELEC 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 langu
9、age and notified to the CEN-CENELEC Management Centre has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latv
10、ia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: Avenue Marnix 17, B-1000 Brusse
11、ls 2011 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 491:2011: ECopyright European Committee for Standardization Provided by IHS under license with CENNot for ResaleNo reproduction or networking permitted without license from IH
12、S-,-,-BS EN 491:2011EN 491:2011 (E) 2 Contents Page Foreword 41 Scope 52 Normative references 53 Terms and definitions .54 Symbols and abbreviations 55 Test methods 55.1 General 55.2 Hanging length and squareness of regular front edge tiles .65.2.1 Principle 65.2.2 Apparatus .65.2.3 Procedure .75.2.
13、4 Expression of results 75.2.5 Test report 75.3 Cover width 75.3.1 Principle 75.3.2 Apparatus .85.3.3 Procedure .85.3.4 Expression of results 95.3.5 Test report 95.4 Flatness 95.4.1 Principle 95.4.2 Apparatus .95.4.3 Procedure 105.4.4 Expression of results . 115.4.5 Test report . 115.5 Mass . 115.5.
14、1 Principle . 115.5.2 Apparatus 115.5.3 Conditioning 115.5.4 Procedure 115.5.5 Expression of results . 115.5.6 Test report . 115.6 Mechanical resistance (transverse strength) 115.6.1 Principle . 115.6.2 Apparatus 125.6.3 Conditioning of tiles . 125.6.4 Procedure 135.6.5 Recording of test results . 1
15、55.6.6 Test report . 155.7 Water impermeability . 155.7.1 Principle . 155.7.2 Apparatus and materials 155.7.3 Conditioning 165.7.4 Procedure 175.7.5 Expression of results . 175.7.6 Test report . 175.8 Freeze-thaw resistance 175.8.1 Principle . 175.8.2 Apparatus 17Copyright European Committee for Sta
16、ndardization Provided by IHS under license with CENNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-BS EN 491:2011EN 491:2011 (E) 3 5.8.3 Preparation of test samples . 175.8.4 Procedure . 185.8.5 Expression of results 185.8.6 Test report 195.9 Nib support 195.9.1 Pr
17、inciple 195.9.2 Apparatus . 195.9.3 Procedure . 195.9.4 Expression of results 195.9.5 Test report 195.10 Reaction to fire performance in accordance with EN 13823 . 215.10.1 Principle 215.10.2 Test specimen assembly 215.10.3 Laying the tiles in the test specimen assembly . 215.10.4 Closing the gaps i
18、n tile specimens between the two wings . 22Bibliography 27Copyright European Committee for Standardization Provided by IHS under license with CENNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-BS EN 491:2011EN 491:2011 (E) 4 Foreword This document (EN 491:2011) has
19、 been prepared by Technical Committee CEN/TC 128 “Roof covering products for discontinuous laying and products for wall cladding”, the secretariat of which is held by NBN. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endors
20、ement, at the latest by March 2012, and conflicting national standards shall be withdrawn at the latest by March 2012. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN and/or CENELEC shall not be held responsible for identifyin
21、g any or all such patent rights. This document supersedes EN 491:2004. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmar
22、k, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. Copyright European Committee for Standardization Provided by IH
23、S under license with CENNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-BS EN 491:2011EN 491:2011 (E) 5 1 Scope This European Standard specifies test methods for concrete roofing tiles and fittings conforming to EN 490, for assembly into pitched roof covering or ex
24、ternal wall cladding or internal wall lining cladding. 2 Normative references The 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 (includ
25、ing any amendments) applies. EN 490:2004, Concrete roofing tiles and fittings for roof covering and wall cladding Product specifications EN 13162:2008, Thermal insulation products for buildings Factory made mineral wool (MW) products Specification EN 13238:2010, Reaction to fire tests for building p
26、roducts Conditioning procedures and general rules for selection of substrates EN 13501-1:2007+A1:2009, Fire classification of construction products and building elements - Part 1: Classification using data from reaction to fire tests EN 13823:2010, Reaction to fire tests for building products Buildi
27、ng products excluding floorings exposed to the thermal attack by a single burning item 3 Terms and definitions For the purposes of this document, the terms and definitions given in EN 490:2004 apply. 4 Symbols and abbreviations l1hanging length of a tile as defined in Figures 1a) and 1c), in millime
28、tres; l2,l3hanging edge lengths of a tile as defined in Figure 1.b), in millimetres; cwcover width of one tile, in millimetres; cwccover width closed up value of 10 tiles, in millimetres; cwdcover width drawn out value of 10 tiles, in millimetres; d profile depth of a tile, in millimetres; x angle a
29、t which test tiles are hung as defined in Figure 1a), in degrees. 5 Test methods 5.1 General Where other test methods are used for factory production control (FPC) a satisfactory statistical correlation with the test methods specified in this document shall be demonstrated. Copyright European Commit
30、tee for Standardization Provided by IHS under license with CENNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-BS EN 491:2011EN 491:2011 (E) 6 5.2 Hanging length and squareness of regular front edge tiles 5.2.1 Principle Tiles are hung from steel battens and measure
31、d to establish hanging length and also the squareness of regular front edge tiles. 5.2.2 Apparatus 5.2.2.1 Steel battens to support the tile (see Figure 1). l 1Xa) x = 20 to 70 l2l3b) Tiles with nominally constant hanging length l1= (l2+ l3)/2 l1c) Tiles with regularly varying hanging length l1= Han
32、ging length measured at lowest point Figure 1 Test method for hanging length Copyright European Committee for Standardization Provided by IHS under license with CENNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-BS EN 491:2011EN 491:2011 (E) 7 5.2.3 Procedure 5.2.3
33、.1 Tiles with nominally constant 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 from the top face of the batten to the lower front edge of the tile at the sides (see Figure 1b), excludin
34、g the interlocking sections in the case of tiles with sidelocks. 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 from the top face of the batten to th
35、e 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 l2and l3to the nearest millimetre and calculate the average per tile l1to the nearest millimetre. 5.2.4.2 Tiles with regularly varying hanging length Record
36、the measured value l1to 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 per tile. l1. to the nearest millimetre; d)
37、 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 are hung or laid on a steel batten to de
38、termine their cover width. Copyright European Committee for Standardization Provided by IHS under license with CENNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-BS EN 491:2011EN 491:2011 (E) 8 5.3.2 Apparatus 5.3.2.1 Steel batten to support 11 tiles. This may be h
39、orizontal or pitched up to 70. 5.3.3 Procedure 5.3.3.1 Interlocking tiles Hang or lay 11 tiles of the same cover width with their locks engaged, following the manufacturers recommendations. Taking care that the interlocking parts of the tiles do not lift or disengage, pull the tiles apart to their m
40、aximum coverage. Measure the drawn-out value cwdover 10 tiles to 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 cwcover 10 tiles to the nearest milli
41、metre (see Figure 2b). cwda) cwd= cover width of 10 tiles drawn out cwcb) cwc= cover width of 10 tiles closed up Figure 2 Testing interlocking tiles for cover width 5.3.3.2 Non-interlocking tiles Hang or lay 10 tiles of the same nominal cover width on a batten following the manufacturers recommendat
42、ions. Push the tiles together. Measure the width of the 10 tiles to the nearest millimetre. Copyright European Committee for Standardization Provided by IHS under license with CENNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-BS EN 491:2011EN 491:2011 (E) 9 5.3.4
43、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 to the nearest millimetr
44、e. 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 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. E
45、N 491. 5.3.5.2 Non-interlocking tiles The test report shall include the following: a) the mean cover width cwc/10 to the nearest millimetre; b) reference 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. 5.4.2 Apparatus 5.4.2.1 Fl
46、at metal surface or two co-planer flat metal plates (see Figure 3). Copyright European Committee for Standardization Provided by IHS under license with CENNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-BS EN 491:2011EN 491:2011 (E) 10 Dimensions in millimetres 132
47、3Key 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 to the nearest millimetre, whichever is the greater. 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 the 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 a
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