Lightweight building component

Tubular lightweight and extruded plastic structural members for use in constructing ribbed concrete roof and mid-level floor/ceiling slabs comprising,

• an elongate tubular member, the member being generally rectilinear in cross-section, having four longitudinal walls, comprising a pair of side walls, a floor, and a top, said sidewalls and floor forming a bottom left and right intersection,
• there being substantially centrally located a horizontal wall substantially parallel to the top and the floor, and extending between the sidewalls to form upper and lower hollow conduit sections of the interior of the member,
• there being a vertical wall substantially parallel to the side walls, and extending from the horizontal wall at a central intersection to the floor substantially centrally thereof,
• the bottom surface of the floor extending beyond the side walls on each side of the member, but lying in substantially the same plane, and serving as the flat bottom or wing-like longitudinal projections each of a uniform thickness on each side of the member, the outer longitudinal edge of each wing including cooperating alignment means arranged to align each member with a next adjacent wing edge in a moisture resistant relationship when a plurality of the members are aligned to form a concrete form,
• there also being a first and a second sloped wall each extending downwardly and outwardly at approximately the same angle from a first set of right and left points proximate to said central intersection, through said side walls, with opposite ends of said sloped walls joined to said wings at a second set of right and left points proximate to said bottom right and left intersections.

Tubular lightweight and extruded plastic structural members for use in constructing ribbed concrete roof and mid-level floor/ceiling slabs comprising:

• an elongate tubular member, the member being generally rectilinear in cross-section, having four longitudinal walls, comprising a pair of side walls, a floor, and a top, said sidewalls and floor forming a bottom left and right intersection;
• there being substantially centrally located a horizontal wall substantially parallel to the top and the floor, and extending between the sidewalls to form upper and lower hollow conduit sections of the interior of the member;
• there being a vertical wall substantially parallel to the side walls, and extending from the horizontal wall at a central intersection to the floor substantially centrally thereof;
• the bottom surface of the floor extending beyond the side walls on each side of the member, but lying in substantially the same plane, and serving as the flat bottom or wing-like longitudinal projections each of a uniform thickness on each side of the member, the outer longitudinal edge of each wing including cooperating alignment means arranged to align each member with a next adjacent wing edge in a moisture resistant relationship when a plurality of the members are aligned to form a concrete form, the alignment means having an upwardly extending finger-like ridge along one wing edge and a complimentary receiving member having an opening to fit said ridge along the other wing, the finger and receiving member constructed and arranged to engage in a substantially mortar impervious mating relationship, and the finger having a longitudinal lobe to prevent passage of water caused by capillary action;
• there also being a first and a second sloped wall each extending downwardly and outwardly at approximately the same angle from a first set of right and left points proximate to said central intersection, through said side walls, with opposite ends of said sloped walls joined to said wings at a second set of right and left points proximate to said bottom right and left intersections;
• there being protuberance means at a right and left end of said top wall constructed and arranged for engagement by adjacent cured concrete in a slab;
• and
• there being longitudinal decorative embossing formed during the extrusion of said member to facilitate hung ceiling installation in commercial and industrial buildings.