Patent ID: 8316594

Claim:
A replacement stair tread assembly comprising: a core member, said core member having a thickness, a stepwise depth, and a cross-wise width, said step-wise depth and said cross-wise width being greater than said thickness; said core member being a dimensionally stabilized core member having a wood-based core matrix, said core matrix having a plurality of overlying layers, said core matrix having cross-wise variation of grain direction between successive layers, said core matrix having substantially uniform mechanical elasticity cross-wise, and said core matrix having substantially uniform mechanical elasticity step-wise; said core matrix having an upper surface and an opposed lower surface; said core member including at least a first wood veneer portion mounted to said upper surface of said core matrix, and a second wood veneer portion mounted to said lower surface of said core matrix, said first and second wood veneer portions lying in parallel planes and having matching material and physical properties; said core member having a quadrilateral form when viewed looking in a direction perpendicular to said plane of said first wood veneer portion; said core member having a periphery and an array of edge members mounted about said periphery such that said core matrix is concealed from view; said edge members being made of solid hardwood; said edge members including at least a first nosed edge member; said edge members including at least a first un-nosed edge member; said core member having a first edge portion for mating engagement with said first un-nosed edge member, said first edge portion having a first profile machined along at least a first portion thereof; said first un-nosed edge member having a second profile machined therealong; said first profile including an out-of-plane feature; said second profile including an out-of-plane feature; said first and second profiles being mutually mating profiles; said first un-nosed edge member having a through thickness matching said core member such that when said first and second profiles are mated said first un-nosed edge member mates flush with said first wood veneer portion of said core member; said core member having a second edge portion for mating engagement with said first nosed edge member, said second edge portion having a third profile; said first nosed edge member having a fourth profile machined therealong; said third and fourth profiles being mutually mating profiles such that when mated together said first nosed edge member having a first nosing, said first nosing being flush with said first wood veneer portion of said core member; and said first nosing having an overall height greater than said thickness of said core member.