ISO 12468-1:2013 屋根の外部からの火災への暴露—パート1：試験方法 | ページ 2

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 first edition (ISO 12468–1:2003), 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: Classification of roofs
• Part 3: Commentary

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 exposure.

• 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.

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 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 through 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 references, the latest edition of the referenced document (including any amendments) applies.

3 Terms and definitions

For the purposes of this document, the terms and definitions given in ISO 13943 and the following apply.