IBC 2003 live load reduction is specified in code section 1607.9. Live load effects on members with influence areas of less than 400 square feet are not modified by live load reduction.

IBC 2003 requires that live loads in excess of 100 psf and live loads from passenger car garages shall not be reduced, except that members supporting two or more floors may be reduced up to 20% per code sections 1607.9.1.1 and 1607.9.1.2. These two load types must be drawn on a "Live (storage)" loading to be considered appropriately.

IBC 2003 requires that live loads of 100 psf or less in public assembly occupancies cannot be reduced per section 1607.9.1.3. These loads must be drawn on a "Live (unreducible)" loading to be considered appropriately.

The reduction of live loads for one-way slabs is not permitted per section 1607.9.1.4. RAM Concept will never reduce one-way slab loads if IBC 2003 is selected.