BS476-24/BS 476-24:1987 fire resistance of ventilation ducts

BS476-24/BS 476-24:1987fire resistance of ventilation ducts
BS 476-24: Fire tests on building materials and structures-Part 24: Method for determination of the fire resistance of ventilation ducts 

The sample exposed to high temperature and pressure conditions, the test samples within the specified time bearing weight, integrity and insulation.

BS476-24/BS 476-24:1987 Focus on 
1．Duration of fire resistance
2．Loadbearing capacity and impermeability
3．Insulation 
4．Integrity

BS476-24/BS 476-24:1987 fire resistance test time
30 minute
60 minute
90 minute
120 minute
150 minute
180 minute
……

BS476-24/BS 476-24:1987 reference 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

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