Heat resistant, insulated wall construction

A tie member for interconnecting spaced apart parallel sheets, that are formed on numerous edge to edge connected plastic panels, for pouring-in-place and curing a concrete core between the sheets to produce a composite, insulated wall construction, comprising:

• a pair of elongated, parallel, rigid, thin sheet metal plates having a pair of opposite surfaces, said plates are interconnected by a number of tie strips, with each tie strip having opposite end portions and with each tie strip being formed of a narrow, elongated strip of sheet metal, and the opposite end portions of each tie strip bent into a flat U-shape having two legs and a bight, with the legs at right angles to an initial plane of the strip;
• the bight of each U-shape bent portion extending through a slot formed in the plate, so that the legs are parallel to the opposite surface of the plate;
• mechanical fastener means extending through the legs of the U-shape bent portion and the plate portion for securing the tie strip and plate together;
• and tooth means carried by the plate for embedding in the surface of an adjacent panel portion;
• said plates being sized and shaped to snugly fit into open end, slotted side, aligned pockets formed in adjacent edge portions of adjacent panels, with the tie strips arranged to extend transversely through the pocket slots;
• whereby the tie members rigidly secure together the parallel sheets and hold the panels against movement caused by, hydrostatic pressure during casting of the concrete and further, the tie strips and plates dissipate into the concrete localized high heat, such as may be caused by fire, to produce a more fireresistant wall construction.

An insulated wall construction comprising:

• a pair of parallel, spaced apart, foam plastic sheets, each formed of numerous smaller panels that are engaged together edge to edge to form a sheet;
• a poured and cured in place concrete core filling the space between the sheets to form a composite plastic-concrete-plastic structure;
• aligned pockets formed in at least some of the engaged edges of adjacent panels, each pocket having an open slot formed through the wall surface into the interior of the pocket and facing toward the opposing panel;
• tie members for interconnecting and immobilizing the panels and the sheets during the pouring and curing of the concrete, with said tie members each comprising a pair of elongated, thin, rigid sheet metal plates that are sized and shaped to snugly fit into a pair of aligned edge pockets;
• a number of thin, narrow, sheet metal strips having opposite edges and extending between each pair of plates, with the opposite edges of the strips extending through the pocket slots into the pockets and connected to the plates;
• tooth members carried by the plates for embedding into the plastic panels;
• and a number of L-shaped clips each having a pointed leg inserted through a slot in the plate for insertion into a portion of the plastic panel adjacent thereto, and each having another leg fastened to the plate;
• wherein the tie members rigidly hold the panels in position prior to and during the pouring of the concrete, thereby forming a casting mold for the concrete, and mechanically fasten the panels and concrete core together, and further, rapidly dissipate heat, such as due to fire, applied to one surface of the wall, into the concrete core for increasing the heat resistance and insulation capacity of the wall.