BS 476-20: Fire Resistance Test to Building Material
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Ä BS 476-20 Fire Resistance Test to Building Material – Standard
ü Fire Tests on Building materials and structures – Part 20. Method of test for determination of the fire resistance of elements of construction (General principles)
Ä BS 476-20 Fire Resistance Test to Building Material – Standard Brief
The objective of determining fire resistance, as described in the part and the associated parts of BS 476, is to assess the behaviour of a specimen of an element of building construction when subjected to defined heating and pressure conditions. The method provides a means of quantifying the ability of an element to withstand exposure to high temperatures, by setting criteria by which the loadbearing capacity, the fire containment (integrity) and the thermal transmittance (insulation) functions can be adjudged.
A representative sample of the elements is exposed to a specified regime of heating and the performance of the test sample is monitored on the basis of criteria described in the standard. Fire resistance of the test elements is expressed as the time for which the appropriate criteria have been satisfied. The times so obtained are a measure of the adequacy of the construction in a fire but have no direct relationship with the duration of a real fire.
BS 476-20 describes a procedure for a laboratory test for the determination of fire resistance of elements of construction.
Ä BS 476-20 Fire Resistance Test to Building Material – Relative Standard
ü BS 476：Fire tests on building materials and structures
ü BS 476-3：Fire tests on building materials and structures. Classification and method of test for external fire exposure to roofs
ü BS 476-4：Fire tests on building materials and structures - Part 4: Non-combustibility test for materials
ü BS 476-5：Fire Tests on Building Materials and Structures Part 5: Method of Test for Ignitability
ü BS 476-6：Fire tests on building materials and structures — Part 6: Method of test for fire propagation for products
ü 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
ü BS 476-11：Fire tests on building materials and structures — Part 11: Method for assessing the heat emission from building materials
ü BS 476-12：Fire tests on building materials and structures — Part 12: Method of test for ignitability of products by direct flame impingement
ü BS 476-13：Fire Tests on Building Materials and Structures Part 13: Method of Measuring the Ignitability of Products Subjected to Thermal Irradiance
ü BS 476-15：Fire Tests on Building Materials and Structures Part 15: Method of Measuring the Rate of Heat Release of Products
ü 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)
ü 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
ü 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
ü 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
ü 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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