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BRITISH STANDARD
BS476:Part7:1997

Fire tests on building materials and structures
Part 7. Method of test to determine the classification of the surface spread of flame of products
ICS 13.220.50

NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW

BS476: Part 7: 1997 Committees responsible for this British Standard

The preparation of this British Standard was entrusted by Technical Committee FSH/21, Reaction to fire tests, upon which the following bodies were represented:

• Association of Building Component Manufacturers
• Association of Roof Light Manufacturers
• Autoclaved Aerated Concrete Products Association
• British Carpet Manufacturers Association Ltd.
• British Iron and Steel Producers Association
• British Plastics Federation
• British Railways Board
• British Resilient Flooring Manufacturers Association
• British Rigid Urethane Foam Manufacturers' Association
• British Wood Preserving and Damp-proofing Association
• Chemical Industries Association
• Chief and Assistant Chief Fire Officers Association
• Department of Health
• Department of the Environment (Building Research Establishment)
• Department of the Environment (Property and Buildings Directorate)
• Department of the Environment for Northern Ireland
• Eurisol (UK Mineral Wool Association)
• European Phenolic Foam Association
• Fibre Cement Manufacturers Association Limited
• Flat Glass Manufacturers' Association
• GAMBICA (BEAMA Ltd.)
• Gypsum Products Development Association
• Home Office
• Institute of Fire Safety
• Institution of Fire Engineers
• London Fire and Civil Defence Authority
• Loss Prevention Council
• National Council of Building Material Producers
• National GRP Construction and Engineering Federation
• Polyethylene Foam Insulation Association
• Queen Mary and Westfield College
• RAPRA Technology Ltd.
• Specialist Ceilings and Interiors Association Ltd
• Thermal Insulation Manufacturers and Suppliers Association (TIMSA)
• Timber Research and Development Association
• Warrington Fire Research Centre
• Wood Panel Industries Federation
• Wood Wool Slab Manufacturers Association

This British Standard, having been prepared under the direction of the Consumer Co-opted members Board, was published under the authority of the Standards Board and comes into effect on 15 January 1997.

Amendments issued since publication

First published as BS 476 December 1932

Amd. No. Date Text affected

• Second edition July 1953
• First published as BS 476: Part 7 February 1971
• Second edition June 1987
• Third edition January 1997

The following BSI references relate to the work on this standard:

• Committee reference FSH/21
• Draft for comment 94/307806 DC
• ISBN 0580262987

BS476: Part 7: 1997 Contents

Page

• Foreword
• Method
• Scope
• Normative references
• Definitions
• Suitability of a product for testing
• Test specimens
• Apparatus
• Ancillary equipment
• Calibration
• Test procedure
• Recording of results
• Classification of results
• Report

Annexes

A (informative) Guidance for operators

B (informative) Effect of thermal characteristics on the performance of assemblies

C (informative) Validation of test method

Tables

Irradiance along horizontal reference line on the calibration board

Classification of spread of flame

Figures

• General arrangement of a typical apparatus
• Typical design of specimen holder
• Position of specimen holder in relation to radiation panel
• Position of pilot burner in relation to surface of specimen
• Typical diagrammatic arrangement of gas and air supply
• Calibration board
• Reference lines to assist surface spread of flame classification

List of references (Inside back cover)