The load factor is calculated by dividing the rentable building area (RBA) by the usable area. This factor can then be applied to the usable area to convert it to RBA for comparison. In markets were space is leased on the basis of the usable area, if the load factor is 15 percent, then the usable area can be multiplied by 1.15, resulting in the RBA. (Synonym: add-on factor)
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