Fire Spread via Wall/Floor Joints in Multi-family Dwellings

摘要

This paper presents the results of three wall/floor joint fire tests conducted on double-stud wall/floor joint assemblies with and without fire stops at the joints. Assemblies with fire stops were tested to determine whether semi-rigid glass and rock fibre insulation boards, steel sheet and Oriented Strand Board could Prevent fire spread through the wall/floor joint into the upper storey cavity between the studs. The assembly without fire stops was tested to investigate the effect of the depth of the vertical air space (13 mm, 25 mm or 38 mm for wood studs and 25 mm for steel studs), inside insulated double-stud walls, on fire spread to the upper storey cavity between the studs. Using the results of this study, the performance of the fire stops and the effect of the air space depth on fire spread through wall/floor joints are discussed.