floor cavity ratio
quotient of five times the sum of the area of the walls bounded by the floor and the working plane and the sum of the areas of the floor and the working plane, used in the calculation of the utilization factor or utilance
Note 1 to entry: The floor cavity ratio is given by the formula
Note 2 to entry: See also "ceiling cavity ratio" and "room cavity ratio".
Note 3 to entry: The floor cavity ratio has unit one.
Note 4 to entry: This entry was numbered 17-452 in CIE S 017:2011.