Fire Staircase Door Width
Doors must not block access or themselves be blocked.
Fire staircase door width. The minimum recommended stair width is between 34 and 36 across the width of the tread. Minimum width clear of all obstructions must be 44 inches. Width of doors stairs and escape routes. Handrails shall be provided on both sides of accessible stairs and steps including landings.
Stair dimensions for straight stairway runs. A door or doorway is the clear width when the door is open see diagram c1. Lwf code of practice for fire safety in the design management and use of. Stair width landing length.
Protected stair v escape stair. Buildings other than dwellinghouses suggests that the width of. Stairwell width and stair landing platform requirements are summarized by these sketches courtesy carson dunlop associates. Stair treads must be wide enough to give good footing.
Section 1910 155 c 3 iv a of this part defines listed and 1910 7 of this part defines a nationally recognized testing laboratory. Firesafe basic means of escape from fire. The stairwell reentry requirements state that stair doors must unlock automatically upon fire alarm. Width of doors stairs and escape routes the building regulations approved document b2 fire safety.
The dimensions for the minimum width of staircases in width of escape stairs table 14 on page 88 and firefighting stairs paragraph 21 3 2 on page 106 disregard the guidance given on page 247 and ignore the minimum clear staircase width 1 5m required to safely assist the evacuation of a person in a manual wheelchair. Minimum width between handrails on stairs shall be 900mm. Nfpa 101 specifies a minimum 11 inch tread and a maximum 78 inch riser for new stairs. Each fire door including its frame and hardware must be listed or approved by a nationally recognized testing laboratory.