There is an approved document guidance available from the builders hardware industry federation bhif hardware for fire and escape doors.
Fire exit door width regulations.
Stairways which are not used as an exit or emergency according to 1910 24 d may have a minimum stair width of 22 inches.
The width of an exit route must be sufficient to accommodate the maximum permitted occupant load of each floor served by the exit route.
The osha exit route requirements 1910 36 g 2 state that the minimum width of any way of exit access shall in no case be less than 28 inches.
If there is a fire in the area where occupants are they are already being exposed to smoke fire and heat.
Objects that project into the exit must not reduce its width.
Leading to an exit or exit discharge the width of the exit and exit discharge must be at least equal to the width of the exit access.
1910 36 g 3 the width of an exit route must be sufficient to accommodate the maximum permitted occupant load of each floor served by the exit route.
Issue 4 2012 detailing the requirements for any fixtures and fittings used with fire doors and fire.
The nfpa emergency exit door requirements code states there is a maximum travel distance allowed to find an exit.
Where there is only one exit access leading to an exit or exit discharge the width of the exit and exit discharge must be at least equal to the width of the exit access.