An underground pedestrian tunnel is not the same as an underground building. This walkthrough compares the relevant SBC 201 provisions and explains which section should be applied.

A fire-rated door keeps a fire compartment intact only when it is fully closed and positively latched. Double-leaf fire doors are common in plant, electrical, mechanical and generator…

A summary of the egress door locking arrangements permitted by SBC 201 and the conditions that apply to each, so that security needs do not compromise safe exit.

Why an exit stair door needs a clear width of at least 800 mm for wheelchair access, how clear width is measured, and how this interacts with egress capacity requirements.