definition
strict definition
crawl space
A partial floor level less than 2 meters high, with insufficient headroom for most adults to walk upright.
A crawl space is a partial floor level, less than 2 meters in height and usually substantially less, where there is not adequate room for most human adults to walk upright.
The height is below 2 meters and is usually considerably lower. Limited upright movement distinguishes the space from a floor of regular height.
The classification concerns the available space rather than a particular use. A low service void does not become a regular floor merely because equipment is installed there.
Related definitions
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attic
A floor level where regular human movement is impeded by the shape of the roof above it. -
basement
An underground floor level of regular height, suitable for human movement or occupancy. -
garden floor
An otherwise regular floor partly below and partly above the surrounding ground surface at the building perimeter. -
mechanical floor
A full floor level above ground filled with mechanical equipment and not generally accessible to occupants. -
mechanical penthouse
A mechanical floor level at the top of a building which is set back from the building's perimeter. -
mezzanine
A floor level above ground which does not fill the entire space within the building's perimeter. -
missing floor
A floor level which does not exist, and is skipped in a building's numbering system. -
ramped floor
A floor level above ground, with a sloping floor surface which connects to other levels. -
regular floor
A normal and occupiable floor level which is fully above the base level of a building or structure. -
stem level
A level in the stem of a tower or a building, with no greater extent than a stairway landing or the equivalent. -
unaligned floor
A floor level which is vertically offset from adjoining floor levels by at least half a meter.