BS476-20/BS 476-20:1987 fire resistance-Standard

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)

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) fuctions can be adjudged.

BS476-20/BS 476-20:1987 Focus on

1．Duration of fire resistance

2．Loadbearing capacity and impermeability

3．Insulation

4．Integrity

BS476-20/BS 476-20:1987 fire resistance test time

30 minute

60 minute

90 minute

120 minute

150 minute

180 minute

……

BS476-20/BS 476-20:1987reference standard

BS 476: Fire tests on building materials and structures.

BS 476-3:2004 external fire exposure roof test

BS 476-4:1970 Non-combustibility test for materials

BS 476-5:1979 Method of test of ignitability

BS476-6:1989+A1:2009 Method of test for propagation for materials

BS 476-7:1997 Surface spread of flame test for material

BS 476-11:1982 Method for assessing the heat emission from building materials

BS 476-12:1991 Ignitability of products by direct flame impingement

BS 476-15:1992 Method for measuring heat release of products-cone calorimeter

BS 476-20:1987 Method for determination of the fire resistance of elements of construction (general principles)

BS 476-21:1987 Methods for determination of the fire resistance of loadbearing elements of construction

BS 476-22:1987 Methods for determination of the fire resistance of non-loadbearing elements of construction