Smoke outlet discharge and shaft construction

Smoke outlets may discharge by means of windows, stall-board risers or pavement lights which can be opened or knocked out provided such covers are readily accessible to the Fire and Rescue Service. Shafts enclosing smoke outlets should be of smoke tight non-combustible construction and have the same period of fire resistance as that for elements of structure in the basement storey served. Shafts from different parts of the same basement storey, or from different basement storeys, should be separated by smoke tight non-combustible fire-resisting construction.