Exterior doors in homes and businesses not only provide security, but they also serve as a vital means of egress during a fire or other emergency. Maximum Doorway Depth. Clear width is 32 inches (815 mm) minimum measured from the end of the door to the face of the doorstop. All exterior sliding glass doors must provide a minimum 28-inch wide × 72-inch high clear opening. The opening width of the door cannot be reduced either. 1003.2.3.1 The clear opening at swinging doors shall be measured between the face of the door and the stop, with the door open 90 degrees. Part E – Sound Insulation is relevant to doors, particularly when fitted in an apartment block. Fire doors obviously play a significant part when exiting a building and the regulations state where they should be situated within a building to slow down and compartmentalise the spread of fire. It might be in keeping with and old building ie a small door to an old cottage! 1910.36(g)(3) The width of an exit route must be sufficient to accommodate the maximum permitted occupant load of … Discussion in 'Builders' Talk' started by mudhut, Aug 28, 2006. mudhut New Member. Locks shall not require the use of a key for operation from the inside. 1003.2.3.2 There shall be no projections into the required clear opening lower than 34 inches (864 mm) above the floor or ground. Landings or finished floors at the required egress door shall be not more than 1 1 / 2 inches (38 mm) lower than the top of the threshold.. (3) Each swinging exterior door other than screen or storm doors shall have a key-operated lock that has a deadlocking latch or a key-operated dead bolt with a passage latch. Clear width is 32 inches (815 mm) minimum measured from the one side wall to the face of the opposite side wall. With every commercial property, there are numerous interior and exterior doors, and the majority of these doors must be built to the proper size. Any other exterior door has a threshold height limited to 7 ¾ inches. 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. minimum height for external door. mudhut New Member. You may also find a few narrower doors in stock, including 30 inches, 28 inches, and 24 inches. However, a single exit route is allowed where the number of employees, the size of the building, or the arrangement of the workplace would enable all … This is the minimum width required for a passage door. Falling Out. Openings more than 24 in (610 mm) in depth shall comply with 4.2.1 and 4.3.3. 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