ISO 12468-2:2005

External fire exposure to roofs — Part 2: Classification of roofs

ISO 12468-2:2005 establishes the classification of roofs tested in accordance with ISO 12468-1. Performance criteria are established with respect to the following: fire penetration or openings; external fire spread; falling of flaming droplets or debris.

Exposition des toitures à un feu extérieur — Partie 2: Classification des toitures

General Information

• Status: Withdrawn
• Publication Date: 14-Aug-2005
• Withdrawal Date: 14-Aug-2005
• ICS: 13.220.50 - Fire-resistance of building materials and elements
• ICS: 91.060.20 - Roofs
• Technical Committee: ISO/TC 92/SC 2 - Fire containment
• Drafting Committee: ISO/TC 92/SC 2 - Fire containment
• Current Stage: 9599 - Withdrawal of International Standard
• Completion Date: 16-Oct-2013

Relations

• Revised: ISO 12468-2:2013 - External exposure of roofs to fire — Part 2: Classification of roofs
• Effective Date: 19-Jan-2012

Standards Content (Sample)

INTERNATIONAL ISO
STANDARD 12468-2
First edition
2005-08-01


External fire exposure to roofs —
Part 2:
Classification of roofs
Exposition des toitures à un feu extérieur —
Partie 2: Classification des toitures





Reference number
ISO 12468-2:2005(E)
©
ISO 2005

---------------------- Page: 1 ----------------------
ISO 12468-2:2005(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.
Details of the software products used to create this PDF file can be found in the General Info relative to the file; the PDF-creation
parameters were optimized for printing. Every care has been taken to ensure that the file is suitable for use by ISO member bodies. In
the unlikely event that a problem relating to it is found, please inform the Central Secretariat at the address given below.


©  ISO 2005
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means,
electronic or mechanical, including photocopying and microfilm, without permission in writing from either ISO at the address below or
ISO's 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 [e-mail]
Web www.iso.org
Published in Switzerland

ii © ISO 2005 – All rights reserved

---------------------- Page: 2 ----------------------
ISO 12468-2:2005(E)
Contents Page
Foreword. iv
Introduction . v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions. 1
4 Classification. 1
5 Test results. 1
6 Field of application . 2
7 Classification report . 4

© ISO 2005 – All rights reserved iii

---------------------- Page: 3 ----------------------
ISO 12468-2:2005(E)
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 12468-2 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 fire exposure to roofs:
 Part 1: Test method
 Part 2: Classification of roofs
iv © ISO 2005 – All rights reserved

---------------------- Page: 4 ----------------------
ISO 12468-2:2005(E)
Introduction
This part of ISO 12468 establishes a classification for roofs tested in accordance with ISO 12468-1. The
classifications described in this part of ISO 12468 consider the two levels of fire exposure as defined in
ISO 12468-1.
 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.

© ISO 2005 – All rights reserved v

---------------------- Page: 5 ----------------------
INTERNATIONAL STANDARD ISO 12468-2:2005(E)

External fire exposure to roofs —
Part 2:
Classification of roofs
1 Scope
This part of ISO 12468 establishes the classification of roofs tested in accordance with ISO 12468-1.
Performance criteria are established with respect to the following:
 fire penetration or openings;
 external fire spread;
 falling of flaming droplets or debris.
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 12468-1, External exposure of roofs to fire — Part 1: Test method
ISO 13943:2000, Fire safety — Vocabulary
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 12468-1 and ISO 13943:2000 apply.
4 Classification
4.1 The classification scheme in Table 1 is based on the results of testing a roof in accordance with
ISO 12468-1. (Fire exposures: Level A test conditions include a large burning brand with radiation and wind;
Level B test conditions include a small brand with wind.)
4.2 Four classes are established in the rank order: A1, A2, B1 and B2 with A1 being the highest
performance. (Level A exposures result in A1 or A2 classes and Level B exposures result in B1 or B2
classes.)
5 Test results
Table 1 gives the test results.
© ISO
...