Patent ID: 7818929
Filing Date: 2010-10-26
Classification: B27M,E01C,E04C

Abstract:
1. A support mat comprising: a plurality of billets fastened together, each of said billets comprising a plurality of vertically oriented individual wood laminations adhesively bonded to each other, said plurality of individual wood laminations having wide faces oriented parallel to a direction of a load applied to said support mat, each billet having outboard laminations, said wide faces of said outboard laminations of each billet defining a wide face of said billet; an expansion pad disposed between the wide faces of adjacent billets, the expansion pad permitting the asymmetrical expansion of the billets; and a substantially rigid fastener extending through and connecting said expansion pad and adjacent billets; wherein said billets, expansion pad, and fastener define a substantially rigid support mat having a substantially planar wide face.