不对， 2009 and 2012 International Building Code 规定是 7 feet 6 inch

1208.2 Minimum ceiling heights. Occupiable spaces, habitable
spaces and corridors shall have a ceiling height of not
less than 7 feet 6 inches (2286 mm). Bathrooms, toilet rooms,
kitchens, storage rooms and laundry rooms shall be permitted
to have a ceiling height of not less than 7 feet (2134 mm).

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• International Building Code vs. International Residential Code -易木- ♂ (782 bytes) () 12/04/2014 postreply 18:30:39