Stairwell width and stair landing platform requirements are summarized by these sketches courtesy carson dunlop associates.
Fire staircase door width.
Width of doors stairs and escape routes.
Section 1910 155 c 3 iv a of this part defines listed and 1910 7 of this part defines a nationally recognized testing laboratory.
Width of doors stairs and escape routes the building regulations approved document b2 fire safety.
Each fire door including its frame and hardware must be listed or approved by a nationally recognized testing laboratory.
Stair dimensions for straight stairway runs.
Stair treads must be wide enough to give good footing.
There is a slight distinction between codes but the ibc states that the stair doors must be capable of being unlocked simultaneously without unlatching upon a signal from the fire command center if present or a signal by.
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.
Lwf code of practice for fire safety in the design management and use of.
The stairwell reentry requirements state that stair doors must unlock automatically upon fire alarm.
Protected stair v escape stair.
Minimum width clear of all obstructions must be 44 inches.
Landings must be at appropriate intervals along a stair or ramp to prevent undue fatigue not exceeding 2500mm between landings.
Nfpa 101 specifies a minimum 11 inch tread and a maximum 78 inch riser for new stairs.
Minimum width between handrails on stairs shall be 900mm.
Stairs must be of sufficient width so two persons can descend side by side to maintain a reasonable rate of evacuation.
Doors must not block access or themselves be blocked.
The minimum recommended stair width is between 34 and 36 across the width of the tread.
Buildings other than dwellinghouses suggests that the width of.
A door or doorway is the clear width when the door is open see diagram c1.