Measuring Door Openings
Special care is needed when measuring the clear opening of a doorway. To measure the clear opening of a standard hinged door, open the door to 90 degrees. Measure the clear door opening from the edge of the doorstop to the edge of the door (not to the door jamb). This measures the clear width of the door opening through which people pass, which is less than the width of the door itself. Door handles and push bars should not be included in the measurements of door opening widths.
Measuring the clear door opening
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