If the usable floor space is unknown, then deduct ________ percent of the total area available to estimate the usable area.
If the usable floor space is unknown, then deduct ________ percent of the total area available to estimate the usable area.
When estimating the usable floor space, a general rule of thumb is to deduct approximately ten percent of the total area available. This accounts for spaces that cannot be utilized due to walls, structural columns, and other non-usable areas.
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