Exception: The landing or floor on the exterior side shall be not more than 7 3 / 4 inches (196 mm) below the top of the threshold provided the door does not swing over the landing or floor. Clear width is 32 inches (815 mm) minimum measured from the one side wall to the face of the opposite side wall. mudhut New Member. Maximum Doorway Depth. Clear width is 32 inches (815 mm) minimum measured from the end of the door to the face of the doorstop. With every commercial property, there are numerous interior and exterior doors, and the majority of these doors must be built to the proper size. 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. Discussion in 'Builders' Talk' started by mudhut, Aug 28, 2006. mudhut New Member. 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. 1910.36(g)(3) The width of an exit route must be sufficient to accommodate the maximum permitted occupant load of … (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. 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. Building Codes for Exterior Doors. All exterior sliding glass doors must provide a minimum 28-inch wide × 72-inch high clear opening. 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. Falling Out. Clear widths :- The effective clear width through a single leaf door, or one leaf of a double leaf door (clear of any projections from the face of the door such as door furniture and weather boards) should be a preferred 800mm and a minimum 750mm based on a straight-on wheelchair approach as set out in clause 6.4.1 of BS 8300:2001. Any other exterior door has a threshold height limited to 7 ¾ inches. You may also find a few narrower doors in stock, including 30 inches, 28 inches, and 24 inches. The opening width of the door cannot be reduced either. Locks shall not require the use of a key for operation from the inside. 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One side wall 'Builders ' Talk ' started by mudhut, Aug 29, 2006 # 4. andyscotland this!