For loads indicated as Reducible, any member supporting 150 square feet or more of Reducible live load is reduced per UBC Eq (7‑1): R = 0.08(A - 150). The reduction is limited to 40% for members receiving load from one floor only and is limited to 60% for members receiving load from more than one floor. The reduction is further limited to that obtained by the equation R = 23.1(1+D/L).

There is a special provision in the Code (Section 1607.5) for live loads greater than 100 psf. The program refers to this type of load as a Storage load and, for loads specified as Storage live loads, a reduction of up to 20% is allowed on columns. No such reduction is made on beams. If the equations involving tributary area indicate a lesser reduction, the reduction is limited to the smaller amount. The user must explicitly designate loads as Storage. Any live load designated by the user as Storage will be treated as explained whether the load is greater than 100 psf or not, and any load not specified by the user as Storage will not be treated as Storage even if it exceeds 100 psf.

Roof live loads may be reduced per either Method 1 or Method 2 of Table 16‑C. However, any value of Roof live load can be input (not necessarily 20 psf) and the program will reduce it with the appropriate factor. For example, if a Roof live load of 30 psf is assigned to a member carrying over 600 square feet of roof area, the load is reduced to 18 psf (30 psf times 0.60) for Method 1. It is assumed that the roof is flat or has a rise less than four inches per foot. The reduction is based on the tributary area loaded by Roof live load. The reduction is limited to a maximum of 40% regardless of the number of levels from which the member receives load, and is further limited to the value obtained by UBC Eq (7‑2).

No reduction is made on loads specified as Unreducible.