ISO 12468-1-2013 External exposure of roofs to fire - Part 1 Test method《屋顶外露部分的防火 第1部分 试验方法》.pdf

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1、 ISO 2013 External exposure of roofs to fire Part 1: Test method Exposition des toitures un feu extrieur Partie 1: Mthode dessais INTERNATIONAL STANDARD ISO 12468-1 Second edition 2013-11-01 Reference number ISO 12468-1:2013(E) ISO 12468-1:2013(E)ii ISO 2013 All rights reserved COPYRIGHT PROTECTED D

2、OCUMENT ISO 2013 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on the internet or an intranet, without prior written permission. Permission

3、 can be requested from either ISO at the address below or ISOs member body in the country of the requester. ISO copyright office Case postale 56 CH-1211 Geneva 20 Tel. + 41 22 749 01 11 Fax + 41 22 749 09 47 E-mail copyrightiso.org Web www.iso.org Published in Switzerland ISO 12468-1:2013(E) ISO 201

4、3 All rights reserved iii Contents Page Foreword iv Introduction v 1 Scope . 1 2 Normative references 1 3 Terms and definitions . 1 4 Symbols 3 5 Selection of test specimen pitch . 3 6 Test specimens 3 6.1 General requirements . 3 6.2 Selection of standard supporting elements . 5 6.3 Positioning of

5、joints 6 6.4 Edge detailing 7 7 Test equipment. 7 7.1 Exposure levels . 7 7.2 Brands . 8 7.3 Wind 10 7.4 Radiation .11 7.5 Timing device 11 7.6 Calibration element11 7.7 Specimen holder .11 7.8 Gas burner . .15 7.9 Stand .17 8 Test conditions 17 8.1 Test environment .17 8.2 Calibration procedure 18

6、9 Conditioning and test preparation .18 9.1 Conditioning .18 9.2 Protection of the edges .19 10 Test procedure .19 10.1 General 19 10.2 Commencement of the test 19 10.3 Ignition and positioning of the brands 20 10.4 End of the test .21 10.5 Post-test examination 21 11 Observations and measurements 2

7、1 11.1 General 21 11.2 External fire spread .21 11.3 Fire penetration 21 11.4 Opening 21 11.5 Damage .22 12 Expression of test results22 13 Test report 22 Annex A (normative) Direct field of application .24 ISO 12468-1:2013(E) Foreword ISO (the International Organization for Standardization) is a wo

8、rldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards is normally carried out through ISO technical committees. Each member body interested in a subject for which a technical committee has been established has the right to be represented o

9、n that committee. International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. The procedures used to develop this

10、 document and those intended for its further maintenance are described in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the different types of ISO documents should be noted. This document was drafted in accordance with the editorial rules of the ISO/IEC Dir

11、ectives, Part 2 (see www.iso.org/directives). Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of any patent rights identified during the deve

12、lopment of the document will be in the Introduction and/or on the ISO list of patent declarations received (see www.iso.org/patents). Any trade name used in this document is information given for the convenience of users and does not constitute an endorsement. For an explanation on the meaning of IS

13、O specific terms and expressions related to conformity assessment, as well as information about ISOs adherence to the WTO principles in the Technical Barriers to Trade (TBT) see the following URL: Foreword - Supplementary information The committee responsible for this document is ISO/TC 92 , Fire Sa

14、fet y , Subcommittee SC 2, Fire Containment. This second edition cancels and replaces the first edition (ISO 124681:2003), of which it constitutes a minor revision. ISO 12468 consists of the following parts, under the general title External exposure of roofs to fire: Part 1: Test method Part 2: Clas

15、sification of roofs Part 3: Commentaryiv ISO 2013 All rights reserved ISO 12468-1:2013(E) Introduction This part of ISO 12468 specifies a test method that relates to the effects of fires on roofs. The test method described in this part of ISO 12468 represents the effect of three levels of fire expos

16、ure. Level A: A large burning brand coming from an adjacent building and falling onto the roof. Level A considers the effects of wind and additional radiant heat. Level B: A medium burning brand coming from a fire in a neighbourhood and falling onto the roof. Level B considers the effect of wind but

17、 without additional radiant heat. Level C: A small burning brand transported by the wind from a remote fire and falling onto the roof. Level C considers the effect of wind but without additional radiant heat. ISO 2013 All rights reserved v External exposure of roofs to fire Part 1: Test method 1 Sco

18、pe CAUTION The attention of all persons concerned with managing and carrying out this fire test is drawn to the fact that fire testing may be hazardous and that there is a possibility that toxic and/or harmful smoke and gases may be evolved during the test. Mechanical and operational hazards may als

19、o arise during the construction of the test elements or structures, their testing, and disposal of test residues. An assessment of all potential hazards and risks to health shall be made and safety precautions shall be identified and provided. Written safety instructions shall be issued. Appropriate

20、 training shall be given to relevant personnel. Laboratory personnel shall ensure that they follow written safety instructions at all times. This part of ISO 12468 specifies a test method to determine the resistance of roofs to external exposure to fire. This method evaluates the behaviour of the ro

21、of when exposed to three types of burning brands combined with wind and with or without heat radiation, concerning a) the fire spread across the external surface of the roof, b) the fire spread within the roof, c) the fire penetration, and d) the production of flaming droplets or debris falling thro

22、ugh the roof, from the underside of the roof, or from the exposed surface. 2 Normative references The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated ref

23、erences, the latest edition of the referenced document (including any amendments) applies. ISO 13943, Fire safety Vocabulary 3 Terms and definitions For the purposes of this document, the terms and definitions given in ISO 13943 and the following apply. 3.1 assembly fabrication of materials and/or c

24、omposites EXAMPLE Sandwich panels. 3.2 burned material material that has been destroyed by combustion or pyrolysis INTERNATIONAL ST ANDARD ISO 12468-1:2013(E) ISO 2013 All rights reserved 1 ISO 12468-1:2013(E) 3.3 composite combination of materials which are generally recognized in building construc

25、tion as discrete entities EXAMPLE Coated or laminated product such as roofing felt. 3.4 continuous deck deck supporting the roof covering in which the gap between adjacent elements is not greater than 0,5 mm (5,0 mm in the case of wooden planks with plain edges) 3.5 damaged material material that ha

26、s been burned, melted, or otherwise visually changed by heat but does not include discoloration and soot deposits 3.6 exposed surface external surface of the calibration element or of the specimen which is subject to the heat conditions 3.7 external fire spread progression and extent of sustained fl

27、aming across the exposed surface of the specimen 3.8 fire penetration any opening, sustained flaming, or glowing due to combustion on the underside that appears during the test and/or the occurrence of any flaming droplets or debris falling through the specimen or from the underside Note 1 to entry:

28、 Charring or discoloration is not to be regarded as fire penetration. 3.9 fire spread within the roof extent of burned material in each functional layer inside the specimen 3.10 flaming droplets or debris burning material falling from or through the specimen that continues to burn on the floor for a

29、t least 5 s 3.11 internal damage extent of damaged material in each functional layer inside the specimen 3.12 material basic single substance or a uniformly dispersed mixture of substances EXAMPLE Metal, stone, wood, bitumen, concrete, or mineral wool. 3.13 measuring zone area of the specimen within

30、 which measurements are made 3.14 opening any hole greater than 10 mm 10 mm that appears during the test which penetrates completely through the specimen 3.15 product material (3.12), composite (3.3), or assembly (3.1) about which information is required2 ISO 2013 All rights reserved ISO 12468-1:201

31、3(E) 3.16 profile pitch repeating length between sections of a uniformly corrugated or undulating roof deck 3.17 roof system covering and sealing systems including any insulating layers or vapour barriers with their supporting elements and roof lights or other closures for roof apertures that are in

32、tended to provide a weatherproof surface Note 1 to entry: Elements with a slope greater than 70 are not considered as roofs in this part of ISO 12468. 3.18 roof covering material (3.12) attached to the deck 3.19 specimen representative section of the roof system prepared for the purpose of test 3.20

33、 sustained flaming flaming arising from an observed location, which persists for 5 s or longer 3.21 underside bottom surface of the specimen 4 Symbols Symbol Description Unit v 1 , v 2 , v 3 , v 4 , v 5 , v 6,v 7 Velocity of the air at the measuring points metres per second (m/s) Pitch (slope) degre

34、es () 5 Selection of test specimen pitch Roof systems designed for only one pitch shall be tested at the actual design pitch. Roof systems designed for more than one pitch shall be tested as follows: a) for pitch () less than 5, test at zero pitch; b) for pitch () from 5 to 20, test at 15; c) for pi

35、tch () greater than 20, test at 30. 6 Test specimens 6.1 General requirements For each level of fire exposure, two specimens shall be tested with dimensions measuring 1 200 mm 10 mm in width 2 000 mm 10 mm in length for each test pitch. (See Figures 1 and 2.) When this is not possible due to the siz

36、e of the roof light or other closure, a larger specimen shall be used. NOTE Roof lights cause difficulties due to their size, shape, composition, and fire behaviour. Further guidance on the testing of roof lights will be presented in the next revision of this part of ISO 12468. ISO 2013 All rights r

37、eserved 3 ISO 12468-1:2013(E) The specimens shall be representative in all details of the roof in practice. Dimensions in millimetres with tolerances of 10 mmKey 1 radiant panel position 2 A brands 3 measuring zone Figure 1 Measuring zone and position of brands for Level A4 ISO 2013 All rights reser

38、ved ISO 12468-1:2013(E)Key 1 measuring zone 2 B brands or C brands Figure 2 Measuring zone and position of the brands for Level B or Level C 6.2 Selection of standard supporting elements 6.2.1 For continuous decks 6.2.1.1 General The test deck shall be selected in accordance with the following: a) I

39、n the case of roof coverings intended to be installed over a continuous deck other than a profiled metal deck, a roof deck in accordance with 6.2.1.2 or 6.2.1.4 shall be used; ISO 2013 All rights reserved 5 ISO 12468-1:2013(E) b) If the materials will only be laid over a profiled metal deck, then a

40、trapezoidal profiled metal deck, in accordance with 6.2.1.3, shall be used as the deck. 6.2.1.2 Wood particleboard decks 6.2.1.2.1 The wood particleboard shall consist of wood particles bonded with polymer adhesive (e.g. urea formaldehyde). This particleboard shall have a density of 680 kg/m 3 50 kg

41、/m 3and shall not be treated with fire retardants. 6.2.1.2.2 A wood particleboard deck shall be constructed from planks 250 mm wide 13 mm 1 mm thick running parallel to the eaves with plain edges and tightly butt jointed so that the gaps between planks do not exceed 0,5 mm. 6.2.1.2.3 If it is intend

42、ed also to cover the case of decks made from wooden planks with plain edges, then these gaps shall be 5 mm 0,5 mm. 6.2.1.3 Metal decks The trapezoidal profiled metal deck shall be made of aluminium or steel (subject to the expected field of application) and have the width of the crown approximately

43、equal to 50 % of the profile pitch and a trough depth of approximately 100 mm. The corrugations shall run parallel to the eaves and be open at the ends. 6.2.1.4 Other non-combustible decks If roofing materials are intended to be laid only on continuous, non-combustible decks with a minimum thickness

44、 of 10 mm, then the test roof deck shall consist of 12 mm 2 mm thick reinforced calcium silicate board (oven dry density 900 kg/m 3 100 kg/m 3 ). 6.2.2 For non-continuous decks The spacing of roof supports of any type shall be in accordance with the maximum permissible spans proposed by the manufact

45、urer for the particular application but not exceeding the minimum dimensions specified for the specimen in 6.1. 6.3 Positioning of joints 6.3.1 General The joints shall be representative of practical application. In the case of overlapping layers, the position of the joints shall be considered to be

46、 the edge of the upper layer. 6.3.2 Description of specimen types with respect to joints Where the dimensions of the elements of any of the layers are such that it requires more than four pieces to cover the specimen, or if any of the layers are without joints, then the specimens shall be fabricated

47、 such that those layers are representative of actual field practice (see Figures 3 and 4). Specimens are categorized by the following types: Type 1: Single central vertical joint in the top layer. Single horizontal joint in the top layer under position of the left brand. Single vertical joint in lay

48、er next to top layer under position of the right brand. Single vertical joint in insulation under position of the left brand see Figure 4 a), Type 1; Ty pe 2: Single vertical joint in the top layer under position of the right brand. Single vertical joint in layer next to insulation under position of

49、 the left brand see Figure 4 b), Type 2;6 ISO 2013 All rights reserved ISO 12468-1:2013(E) Type 3: One cross joint of the top layer under position of the right brand and, where possible according to the design of the product, a vertical joint in layer under top under the left brand see Figure 4 c), Type 3; Type 4: Centre of one element of the top layer and, where possible according to the design of the product, a vertical joint of supporting deck, under position of the righ