Wood Lateral Distribution Factor for a load directly over a beam?
Wood Lateral Distribution Factor for a load directly over a beam?
(OP)
A concentrated load is placed on 2”x6” decking (wide face bearing) over a 2”x8” joist. If the load is centered on the joist, can the NDS lateral distribution factor be applied? Generally I would conservatively assume that 100% of the load applies directly to the beam but in this case we need to find load reductions anywhere we can. The NDS commentary (C15.1.1) states “Generally all designs involving multiple parallel bending members that are loading through traverse elements such as flooring, decking, or sheathing are capable of some lateral distribution of a concentrated load on one member to adjacent members on either side. The repetitive member factor (see NDS 4.3.9, 7.3.6, 8.3.7) partially accounts for such load redistribution.”






RE: Wood Lateral Distribution Factor for a load directly over a beam?
RE: Wood Lateral Distribution Factor for a load directly over a beam?
Typically it isn't much though, and I wouldn't use that in conjunction with the NDS repetitive factor.