Abstract: An improved method of concrete building slab construction comprising positioning a precast base portion having longitudinally extending bridge-type reinforcing units or joists pre-stressed in place therein, with the reinforcing units being transversely stiffened on precast concrete wall panels having vertical voids and covering the slabs with concrete during final pouring operations at the building site wherein the concrete enters the vertical voids.

Abstract: A series of precast concrete links interconnect the upper ends of vertical wall panels and a precast roof. The links are formed with slots at their longitudinal ends for the reception of specially formed reinforcement members, as required by the design of the building under construction, and some of said links being formed with openings intermediate their ends.

Abstract: An in-ground swimming pool having a plurality of panels; the vertical edges of each adjacent panel seized between a front wall-joint and rear back-up joint having a rearwardly extending U-shaped channel to receive one side edge of a triangular brace; another U-shaped channel to receive the other side edge of the triangular brace; another U-shaped channel at the top of each panel to receive the edge of a deck member; a double channel having a regular position attached at the top of the panels to receive the outer edge of a horizontal deck; another double channel having a regular channel, receiving the bottom of each panel, and offset channels on each double channel receiving an outer edge of the deck; each offset channel having a brace attached at each end in the offset channels.

Abstract: A concrete reinforcement means arranged in cast walls particularly but not exclusively for the purpose of supporting the wall during casting of the superposed wall, the upper ends of said means projecting vertically to a level past the plane of the predetermined surface of the joisting slab to be cast on top of the first wall. The reinforcement means are sufficiently pliant to bend down level with the joisting slab surface and capable of springing back to their original position, whereby any tool necessary for the finishing treatment of the concrete joisting slab may work on the entire slab surface in a quick and efficient manner without being impeded by the upright ends of said reinforcement means.

Abstract: The wall structure is comprised of a building panel which includes U-shaped side members each having a web portion and outwardly disposed spaced apart flange members with a plurality of sheet members extending between the web portions of the side members. The sheet members dwell in the same plane and the adjacent edges of the sheet members may be spaced from each other. Pairs of stiffener members extend between the side members on opposite sides of the sheet members and cover the adjacent edges of adjacent sheet members. The stiffener members have a beveled outer surface so that particulate material will not lodge thereon when the panel is in a vertical position. The stiffener members form an enclosed compartment along the adjacent edges of adjacent sheet members.

Abstract: The structures of the present invention start with a basic hollow tube of any desired outer shape and made of paper, plastic or metal. When paper is used, it is vacuum impregnated with a plastic resin and oven baked to give it rigidity. The tube may also be covered with an ornamental veneer, if desired. The tubes are provided with suitable openings to receive matching counterparts fitting against the openings. Strong, rigid core members of wood, plastic or metal are positioned in the tubular members with the abutting portions of the core members interconnected. The structure is placed in a clamp to hold the parts together in proper position. Polyurethane is then poured into one end, the end is capped, and the structure is rotated to evenly distribute the polyurethane. The urethane sets at room temperature and expands as it sets to internally mold the members into a solid structure. The finished structure can be drilled, machined, or bolted to add features in the conventional manner.

Abstract: The present prefabricated structural element is especially adapted for the formation of balconies or other cantilevered structures. To this end a floor slab section or main section is joined to a balcony or cantilevered section by reinforcing steel elements which are connected to or in both sections and which bridge a gap between the sections. The gap width between the sections is preferably narrower than the top width of a supporting member, such as a wall or header, so that the gap may be filled with poured-in-place concrete once the element is properly placed in the desired position on top of the header or other supporting structure.