Patent ID: 8266867

Claim:
A resin-based fiber-reinforced composite structural building panel, having a height defined when said building panel is in an upright use orientation, a length, and a thickness, said structural building panel comprising: (a) a first outermost fiber-reinforced polymeric layer, said first outermost layer defining an outwardly-facing surface of said building panel; (b) a second innermost fiber-reinforced polymeric layer, said second innermost layer defining at least a first portion of an inwardly-facing surface, and a first thickness, of said building panel; (c) foam elements in said structural building panel, (i) a first set of elongate said foam elements having lengths thereof extending along the height of said building panel, widths thereof extending along the length of said building panel, and thicknesses thereof, extending along the thickness of said building panel, (ii) a second set of elongate said foam elements having lengths thereof extending along the height of said building panel, widths thereof extending along the thickness of said building panel, and thicknesses thereof, extending along the length of said building panel, the widths of the second set of said foam elements being greater than the thickness of the first set of said foam elements, ones of said second set of said foam elements being spaced from each other by ones of said first set of said foam elements, and wherein ones of said second set of foam elements protrude from the first portion of the inwardly-facing surface thereby defining a second portion of the inwardly-facing surface, and a second thickness in said building panel, greater than the first thickness.