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Exit routes should have ceilings at least 7 ft., 6 in. high and an exit access must be at least 28 inches wide at all points
Exit routes must have ceilings at least 7 ft., 6 in. high and an exit access must be at least 28 inches wide at all points. Objects that project into the exit must not reduce its width.
at least 28 inches/ 71.1 cms.
in Australia it is a minimum of 600 millimetres wid e