Patent ID: 8726614

Claim:
A composite material structure comprising a plate having an upper side, an under side and at least first and second beams, the at least first and second beams each having a plurality of beam walls comprising at least an upper beam wall and a base beam wall and a pair of spaced apart beam side walls intermediate to and adjoining the at least upper and base beam walls defining a spacial area intermediate the plurality of beam walls, each of the at least first and second beams being attached to the under side of the plate at the at least upper beam wall, the at least first beam having an open ended passage extending between the at least pair of beam side walls, the at least second beam extending through the open ended passage and residing between and in contact with an inner surface of the at least upper beam wall and an inner surface of the at least base beam wall of the at least first beam, wherein the open ended passage and the at least second beam are sized and shaped so that the at least upper beam wall and the at least base beam wall of the at least second beam are in abutment with the inner surface of the at least upper beam wall and the inner surface of the at least base beam wall of the at least first beam respectively in the open ended passage, wherein the composite material structure comprises fibers woven into a woven structure into which a matrix resin is infused, wherein the at least first and second beams have load bearing properties in a longitudinal direction and a lateral direction, and wherein the at least first beam has the same load bearing properties in the longitudinal direction and the lateral direction as the at least second beam.