Ribbed waferboard product

A consolidated, structurally reinforced wood waferboard consolidated under elevated temperature and pressure conditions comprising a structurally reinforced consolidated elongated panel having one major surface thereof substantially planar and an opposite major surface thereof provided with longitudinally extending, outwardly projecting, substantially parallel integral ribs having intervening longitudinally extending substantially parallel valleys therebetween, said panel being formed by pressing at elevated temperature a mat of elongated wood wafers coated with adhesive, said mat having one major surface thereof substantially planar and having rib forming projections composed of said wood wafers coated with adhesive extending from a second major surface of said mat opposite said one surface of said mat to provide a mat having rib forming areas of a first thickness spaced by valley forming areas of said composite mat of a second thickness less than said first thickness, said consolidated panel having a density in the area of said ribs within 15 percent of the average density of said consolidated panel in the areas of said valleys, said elongated wafers at least in said areas of said ribs being oriented with their longitudinal axes substantially parallel to the longitudinal axes of said ribs.