Lightweight building component

A structural device for constructing ribbed concrete slabs, comprising:

• an elongate hollow tubular member having:
• two side walls each having a top region with a bottom thereof;
• a substantially horizontal top wall connecting said bottom of said top region of said first side wall to said bottom of said top region of said second side wall to form:
• side wall fingers respectively extending along said side walls away from said top wall;
• and
• an upper exterior chamber for receiving a material therein;
• a bottom wall connected to said two side walls, said bottom wall extending beyond said two side walls and forming two external wings;
• intermediate walls;
• said side walls, said top wall, said bottom wall, and said intermediate walls defining at least two interior chambers;
• said intermediate walls forming two truss configurations disposed in one of said two interior chambers, said two truss configurations partially defining said one chamber.

An assembly for constructing ribbed concrete slabs, comprising:

• a plurality of elongate hollow tubular members each having:
• two side walls being first and second substantially vertically disposed opposing parallel side walls, each of said side walls having an interior side wall surface, a top region and a bottom;
• a top wall connected to said two side walls;
• intermediate walls defining at least two interior chambers and forming two truss configurations disposed in one of said two interior chambers, said at least two interior chambers including upper and lower interior chambers, said truss configurations each being disposed in said lower interior chamber at a respective one of said two side walls, said two truss configurations partially defining said lower interior chamber;
• said top wall being a substantially horizontal top wall connecting said top region of said first side wall to said top region of said second side wall and forming a top of said upper interior chamber;
• said intermediate walls including a substantially horizontal intermediate span connected to each of said first and second side walls and defining a boundary between said upper and lower interior chambers;
• a bottom wall extending beyond said two side walls and forming two external wings, one of said wings having a first portion of an interlocking assembly and another of said wings having a second portion of an interlocking assembly, said bottom wall being a substantially horizontal bottom wall connecting said bottom of said first side wall to said bottom of said second side wall;
• and
• each of said two truss configurations being connected to said intermediate span and to said bottom wall and being respectively connected to one of said first and second side walls;
• and
• said members being adapted to interlock with one another in series by connecting said first portion of one member with said second portion of another member.

A structural member, comprising:

• first and second substantially vertically disposed opposing parallel side walls each having a top region, and a bottom;
• a substantially horizontal top wall connecting said top region of said first side wall to said top region of said second side wall;
• a substantially horizontal bottom wall connecting said bottom of said first side wall to said bottom of said second side wall, said bottom wall extending beyond said two side walls and forming two external wings each having one portion of a two-portion connecting device for connecting one structural member to another structural member;
• a substantially horizontal intermediate span connected to each of said first and second side walls and disposed parallel to said top wall and to said bottom wall;
• said side walls, said top wall, and said intermediate span defining an upper interior chamber;
• first and second truss configurations each connected to said intermediate span and to said bottom wall and respectively connected to one of said first and second side walls;
• said intermediate span, said first and second truss configurations, and said bottom wall defining a lower interior chamber;
• and
• each of said first and second truss configurations having a vertical wall and two intermediate walls.

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, said member being generally rectilinear in cross-section, having four longitudinal walls defining an interior and comprising a pair of side walls, a floor, and a top;
• there being a horizontal wall disposed between said top and said floor substantially parallel to said top and said floor, and extending between said side walls to form upper and lower hollow conduit sections of said interior of said member;
• there being two vertical walls substantially parallel to said side walls and extending from said horizontal wall to said floor;
• there also being, between each of said two vertical walls and a respective one of said side walls, first and second sloped walls each extending from a respective one of said vertical walls to said respective one of said side walls;
• and
• said floor having a bottom surface extending beyond said side walls on each side of said member, but lying in substantially the same plane, and forming a wing on each side of said member, each wing having an outer longitudinal edge with cooperating alignment means disposed to align said member with a next adjacent wing edge of another different member in a moisture resistant relationship when a plurality of said members are interconnected to form a concrete form.