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BS 476-6 Fire Test to Building Material – Standard
> BS 476-6: Fire Tests on Building materials and structures – Method of test for fire propagation for products
BS 476-6 Fire Test to Building Material – Brief
Part 6 of BS 476 specifies a method of test, the result being expressed as a fire propagation index, that provides a comparative measure of the contribution to the growth of fire made by an essentially flat material, composite or assembly. It is primarily intended for the assessment of the performance of internal wall and ceiling linings.
BS 476-6 Fire Test to Building Material – Test Procedure
Once a satisfactory repeatable calibration is achieved, allow the apparatus and specimen holder to cool to ambient temperature, remove a specimen from the conditioning chamber and mount it in the specimen holder. Where necessary, back it with non-combustible packing, previously conditioned, to ensure that when the holder is clamped on to the combustion chamber, the face of the test specimen is in contact with the walls of the combustion chamber.
Carry out the test procedure e.
Decomposition of the specimen during test may result in the formation of soot deposits on the thermocouple hot junctions, which may interfere with the accurate measurement of gas temperatures. To minimize this effect, clean the thermocouples at least 30s before every temperature reading after the first 3 min of test, by removing them from the chimney and cleaning them with fine wire wool or a fine wire brush, then replacing them.
Record the mV output from the thermocouples of the flue gases throughout the duration of the test.
Note the actual mV output at the intervals and the mV rises above the initial m V reading.
Calculate Es, the output from the thermocouples for the test specimen, in mV, by the same method specified for Ec and convert it to temperature rise for the flue gases
The determination of the fire propagation index requires results from three specimens, but if any specimen exhibits the behaviour described, test up to a maximum of five specimens in an attempt to obtain three valid test results
BS 476-6 Fire Test to Building Material – Reference Standard
> BS 476：Fire tests on building materials and structures
> BS 476-3：Fire tests on building materials and structures. Classification and method of test for external fire exposure to roofs
> BS 476-4：Fire tests on building materials and structures - Part 4: Non-combustibility test for materials
> BS 476-5：Fire Tests on Building Materials and Structures Part 5: Method of Test for Ignitability
> BS 476-6：Fire tests on building materials and structures — Part 6: Method of test for fire propagation for products
> BS 476-7：Fire Tests on Building Materials and Structures Part 7: Method of Test to Determine the Classification of the Surface Spread of Flame of Products
> BS 476-11：Fire tests on building materials and structures — Part 11: Method for assessing the heat emission from building materials
> BS 476-12：Fire tests on building materials and structures — Part 12: Method of test for ignitability of products by direct flame impingement
> BS 476-13：Fire Tests on Building Materials and Structures Part 13: Method of Measuring the Ignitability of Products Subjected to Thermal Irradiance
> BS 476-15：Fire Tests on Building Materials and Structures Part 15: Method of Measuring the Rate of Heat Release of Products
> BS 476-20：Fire Tests on Building Materials and Structures Part 20: Method for Determination of the Fire Resistance of Elements of Construction (General Principles)
> BS 476-21：Fire Tests on Building Materials and Structures Part 21: Methods for Determination of the Fire Resistance of Load bearing Elements of Construction
> BS 476-22：Fire Tests on Building Materials and Structures Part 22: Methods for Determination of the Fire Resistance of Non- Load bearing Elements of Construction
> BS 476-23：Fire Tests on Building Materials and Structures Part 23: Methods for Determination of the Contribution of Components to the Fire Resistance of a Structure
> BS 476-24：Fire Tests on Building Materials and Structures Part 24: Method for Determination of the Fire Resistance of Ventilation Ducts
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