Safety standards for public buildings are set by the Occupational Safety & Health Administration (OSHA). Included in the standards are the design of pedestrian passageways.
Twenty-Eight Inches Minimum
Twenty-eight inches is the minimum width for any walkway leading to an exit. The door must at least equal the passageway width if there is only one passageway.
If a large number of people is expected to use the passageway, the width must be more than 28 inches.
As a passageway approaches an exit, it may not decrease in width.
A passageway that has dual use with machinery such as fork-lifts must provide clearance of at least three feet wider than the largest equipment, or a minimum of four feet.
Jack Burton started writing professionally in 1980 with articles in "Word from Jerusalem," "ICEJ Daily News" and Tagalong Garden News. He has managed radio stations, TV studios and newspapers, and was the chief fundraiser for Taltree Arboretum. Burton holds a B.S. in broadcasting from John Brown University. He is a 26-year veteran of the U.S. Navy/Navy Reserves and the Navy Seabees.