ISO-12468-1-2003.pdf

Reference number ISO 12468-1:2003(E) © ISO 2003 INTERNATIONAL STANDARD ISO 12468-1 First edition 2003-03-15 External exposure of roofs to fire Part 1: Test method Exposition des toitures à un feu extérieur Partie 1: Méthode d'essais Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=Aramco HQ/9980755100 Not for Resale, 04/16/2007 10:05:20 MDTNo reproduction or networking permitted without license from IHS -,-,- ISO 12468-1:2003(E) PDF disclaimer This PDF file may contain embedded typefaces. In accordance with Adobe's licensing policy, this file may be printed or viewed but shall not be edited unless the typefaces which are embedded are licensed to and installed on the computer performing the editing. In downloading this file, parties accept therein the responsibility of not infringing Adobe's licensing policy. The ISO Central Secretariat accepts no liability in this area. Adobe is a trademark of Adobe Systems Incorporated. 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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 ii © ISO 2003 All rights reserved Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=Aramco HQ/9980755100 Not for Resale, 04/16/2007 10:05:20 MDTNo reproduction or networking permitted without license from IHS -,-,- ISO 12468-1:2003(E) © ISO 2003 All rights reserved iii Contents Page Forewordiv Introduction v 1 Scope1 2 Normative references .1 3 Terms and definitions.1 4 Symbols .3 5 Selection of test specimen pitch.3 6 Test specimens .4 6.1 General requirements.4 6.2 Selection of standard supporting elements.5 6.3 Positioning of joints6 6.4 Edge detailing7 7 Test equipment7 7.1 Exposure levels.7 7.2 Brands8 7.3 Wind10 7.4 Radiation10 7.5 Timing device 10 7.6 Calibration element.10 7.7 Specimen holder .10 7.8 Gas burner.14 7.9 Stand 15 8 Test conditions15 8.1 Test environment15 8.2 Calibration procedure.16 9 Conditioning and test preparation 16 9.1 Conditioning16 9.2 Protection of the edges17 10 Test procedure 17 10.1 General.17 10.2 Commencement of the test17 10.3 Ignition and positioning of the brands .18 10.4 End of the test .19 10.5 Post-test examination.19 11 Observations and measurements .19 11.1 General.19 11.2 External fire spread.19 11.3 Fire penetration.20 11.4 Opening20 11.5 Damage 20 12 Expression of test results20 13 Test report20 Annex A (normative) Direct field of application22 Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=Aramco HQ/9980755100 Not for Resale, 04/16/2007 10:05:20 MDTNo reproduction or networking permitted without license from IHS -,-,- ISO 12468-1:2003(E) iv © ISO 2003 All rights reserved Foreword ISO (the International Organization for Standardization) is a worldwide 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 on 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. International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2. The main task of technical committees is to prepare International Standards. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote. 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. ISO 12468-1 was prepared by Technical Committee ISO/TC 92, Fire safety, Subcommittee SC 2, Fire containment. ISO 12468 consists of the following parts, under the general title External exposure of roofs to fire Part 1: Test method Part 2: Classification Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=Aramco HQ/9980755100 Not for Resale, 04/16/2007 10:05:20 MDTNo reproduction or networking permitted without license from IHS -,-,- ISO 12468-1:2003(E) © ISO 2003 All rights reserved v 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 two levels of fire exposure. Level A: A large burning brand coming from a nearby building and falling onto the roof. Level A considers the effects of wind and additional radiant heat. Level B: A small burning brand transported by the wind from a remote fire and falling onto the roof. Level B considers the effect of wind but without additional radiant heat. Any national regulation may refer to only one or both of the two levels of fire exposure. Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=Aramco HQ/9980755100 Not for Resale, 04/16/2007 10:05:20 MDTNo reproduction or networking permitted without license from IHS -,-,- Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=Aramco HQ/9980755100 Not for Resale, 04/16/2007 10:05:20 MDTNo reproduction or networking permitted without license from IHS -,-,- INTERNATIONAL STANDARD ISO 12468-1:2003(E) © ISO 2003 All rights reserved 1 External exposure of roofs to fire Part 1: Test method 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 also 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 training shall be given to relevant personnel. Laboratory personnel shall ensure that they follow written safety instructions at all times. 1 Scope 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 roof when exposed to two 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; d) the production of flaming droplets or debris falling through the roof, from the underside of the roof or from the exposed surface. 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 (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 composites EXAMPLE Sandwich panels. Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=Aramco HQ/9980755100 Not for Resale, 04/16/2007 10:05:20 MDTNo reproduction or networking permitted without license from IHS -,-,- ISO 12468-1:2003(E) 2 © ISO 2003 All rights reserved 3.2 burned material material that has been destroyed by combustion or pyrolysis 3.3 composite combination of materials which are generally recognized in building construction 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 has 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 flaming 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 Charring or discoloration is not 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 at 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 which measurements are made Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=Aramco HQ/9980755100 Not for Resale, 04/16/2007 10:05:20 MDTNo reproduction or networking permitted without license from IHS -,-,- ISO 12468-1:2003(E) © ISO 2003 All rights reserved 3 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 required 3.16 profile pitch repeating length between sections of a uniformly corrugated or undulating roof deck 3.17 roof 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 intended to provide a weatherproof surface NOTE 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 prepared for the purpose of test 3.20 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 v1, v2, v3, v4, v5, v6, v7 Velocity of the air at the measuring points metres per second (m/s) Pitch (slope) degrees (°) 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 pitch () greater than 20°, test at 30°. Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=Aramco HQ/9980755100 Not for Resale, 04/16/2007 10:05:20 MDTNo reproduction or networking permitted without license from IHS -,-,- ISO 12468-1:2003(E) 4 © ISO 2003 All rights reserved 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 size 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. The specimens shall be representative in all details of the roof in practice. Dimensions in millimetres with tolerances of ± 10 mm Key 1 radiant panel position 2 A Brands 3 measuring zone Figure 1 Measuring zone and position of the brands for Level A Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=Aramco HQ/9980755100 Not for Resale, 04/16/2007 10:05:20 MDTNo reproduction or networking permitted without license from IHS -,-,- ISO 12468-1:2003(E) © ISO 2003 All rights reserved 5 Dimensions in millimetres with tolerances of ± 10 mm Key 1 measuring zone 2 B Brands Figure 2 Measuring zone and position of the brands for Level B 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) In 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. Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=Aramco HQ/9980755100 Not for Resale, 04/16/2007 10:05:20 MDTNo reproduction or networking permitted without license from IHS -,-,- ISO 12468-1:2003(E) 6 © ISO 2003 All rights reserved b) If the materials will only be laid over a profiled metal deck, then a 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 bon