Construction panels for structural support systems

A construction panel comprising a core of foamed polyurethane having a density of at least 4 pounds per cubic foot embodied between first and second major face members made of polyester resin reinforced with glass fibers in multidirectional orientation, pultrusion angle members encapsulated within said panel, said pultrusion angle members comprising side walls of said panel, said side walls having a portion extending beyond the plane of one of said major faces, said extending portion having a plurality of holes therethrough to facilitate connecting said panels to each other, and at least one elongated pultrusion reinforcing member disposed within said panel between said major face members and bonded to said major face members, said pultrusion reinforcing member being U-shaped in cross section to define a channel between the side walls of the reinforcing member, said pultrusion angle members and said pultrusion reinforcing member being prestressed and made of polyester resin reinforced with continuous strands of glass fibers in unidirectional orientation, said glass fibers used to reinforce said major face members having portions extending from the inner surface of said major face members into the interior of said panel whereby a mechanical and chemical bond is formed between said core and said major face members.