ISO 12468-2:2013

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

ISO 12468-2:2013 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• Status: Withdrawn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: 15-Oct-2013
• Withdrawal Date: 15-Oct-2013
• 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: 29-Nov-2019

Relations

• Revises: ISO 12468-2:2005 - External fire exposure to roofs — Part 2: Classification of roofs
• Effective Date: 19-Jan-2012
• Consolidated By: ISO 4043:2016 - Simultaneous interpreting — Mobile booths — Requirements
• Effective Date: 06-Jun-2022

Standards Content (Sample)

INTERNATIONAL ISO
STANDARD 12468-2
Second edition
2013-11-01
External exposure of roofs to fire —
Part 2:
Classification of roofs
Exposition des toitures à un feu extérieur —
Partie 2: Classification des toitures
Reference number
ISO 12468-2:2013(E)
©
ISO 2013

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ISO 12468-2:2013(E)

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ii © ISO 2013 – All rights reserved

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ISO 12468-2:2013(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
6.1 Pitch . 2
6.2 Nature of the deck . 2
6.3 Level of fire exposure . 4
6.4 Extension of the field of application . 5
7 Classification report . 5
© ISO 2013 – All rights reserved iii

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ISO 12468-2:2013(E)

Foreword
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The committee responsible for this document is ISO/TC 92, Fire Safety, Subcommittee SC 2, Fire containment.
This second edition cancels and replaces the previous edition (ISO 12468-2:2005), 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: Classification of roofs
The following parts are under preparation:
— Part 3: Commentary
iv © ISO 2013 – All rights reserved

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ISO 12468-2:2013(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 three levels of fire exposure as defined
in ISO 12468-1.
— 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 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.
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INTERNATIONAL STANDARD ISO 12468-2:2013(E)
External exposure of roofs to fire —
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 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
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 13943:2008, Fire safety — Vocabulary
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 12468-1 and ISO 13943:2008 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 medium brand with wind; Level C test conditions include a small
brand with wind.)
4.2 Six classes are established in the rank order: A1, A2, B1, B2, C1, and C2 with A1 being the highest
performance. (Level A exposures result in A1 or A2 classes, Level B exposures result in B1 or B2 classes,
and Level C exposures result in C1 or C2 classes.)
5 Test results
Table 1 gives the te
...