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.. Clear width is 32 inches (815 mm) minimum measured from the one side wall to the face of the opposite side wall. Building Codes for Exterior Doors. This is the minimum width required for a passage door. 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. Maximum Doorway Depth. 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. 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 … 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. Part E – Sound Insulation is relevant to doors, particularly when fitted in an apartment block. 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. Maximum Doorway Depth. 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. Falling Out. 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. Any other exterior door has a threshold height limited to 7 ¾ inches. Discussion in 'Builders' Talk' started by mudhut, Aug 28, 2006. mudhut New Member. Openings more than 24 in (610 mm) in depth shall comply with 4.2.1 and 4.3.3. 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. minimum height for external door. (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 end of the door to the face of the doorstop. mudhut New Member. You may also find a few narrower doors in stock, including 30 inches, 28 inches, and 24 inches. 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