Abstract: A fire resistive and insulating bonded composite structure includes a binder made from a mixture of a weak acid and a powdered base metal oxide wherein the acid and metal fuse as a mixture under an exothermic reaction into the binder. A fibrous cellulose material is encapsulated within the binder and rendered non-flammable thereby. The subject invention further provides a method of making the bonded composite structure including the steps of mixing the weak acid and powdered base metal oxide, encapsulating the fibrous cellulose material within the binder and rendering the fibrous cellulose material non-flammable thereby, forming the slurry mixture into a predetermined form, and setting the formed mixture into a solid.

Abstract: An improved access panel assembly including a multi-functional frame which enables the door to be mounted within the frame from either opposing face. Also included is a unique locking mechanism which enables the door to be press-fitted within the frame from either face while firmly retaining the door within the frame. The assembly is fabricated from plastic composition material which is highly resistant to environmental conditions, particularly water and humidity.

Abstract: A block used for forming reinforced concrete structures employs a number of thin-wall tubes supported in spaced parallel relationship to one another. The upper and lower ends of the tubes are supported by laterally extending sheet metal frames which leave the tube ends open. The upper frame has an upward opening channel shaped cross-section. A pair of wall panels which form the inner and outer wall surfaces of the completed structure sandwich the tubes and extend between the frames. The volume between the panels, exterior of the tubes, is filled with a lightweight thermal insulation. In the completed structure, the tubes are filled with reinforced concrete to form the columns for the structure and interconnected by horizontal reinforced concrete bond beams poured in the upper frame members.

Abstract: A lightweight, thermally insulated block form for reinforced concrete construction, having voids extending between the top and bottom for the reception of concrete, is formed with a sheath of a non-combustible porous material, and a core of foamed plastic. The concrete receiving voids in the core are lined with circular cardboard tubes. In the finished construction the organically based plastic foam is enclosed in the inorganic non-combustible sheath and the surface of the sheath is sufficiently non-resilient so that when properly coated to seal and protect the surface it may act as a finished building surface. The cardboard tubes contain the concrete slurry so as to isolate the low tensile strength, low modulus of elasticity block against forces which might crack or distort the block.The block is formed by joining four rectangular slabs of the sheath material at their ends to form an open-ended rectangular tube.