STRUCTURAL TIE SHEAR CONNECTOR FOR CONCRETE AND INSULATION SANDWICH WALLS

摘要

A structural tie shear connector (20) utilized in a concrete and insulationsandwich wall panel (10) having first and second wythes(12, 14) and an insulation layer (16) interposed therebetween. The connector(20) includes first and second horizontal strands (22, 24) ofthermally non-conductive material which are adapted to be encased by therespective wythes (12, 14). A transverse web (26) of thermallynon-conductive material interconnects the first and second strands (22, 24)through the insulation layer (16). The web (26) includes strandsformed into a lattice structure. At least one (30) of the strands (22, 24, 28,30, 32) of the lattice extends at an angle with respect to oneof the first and second strands (22, 24) so as to be in tension when a load isapplied to the wall panel (10). The connector (20) resemblesa bow tie. The method of making sandwich wall panels (10) disclosed hereinincludes pouring the first layer (14) of concrete into a form(50); laying a plurality of insulation strips (16A, 16B, 16C, etc.) adjacenteach other to define at least one gap (52) therebetween; providinga bow tie shear connector (20) having a chairing loop portion (32) thereon;while the first layer (14) of concrete is still plastic, insertingthe connector (20) through the gap (52) and into the first layer (14) ofconcrete such that the chairing loop portion (32) rests on the bottomof the form (50); and pouring a second layer (12) of wet concrete onto theinsulation strips (16A, 16B, 16C, etc.) in the form (50). Thechairing loop (32) positively locates the connector (20) with respect to theform (50), the concrete layers (12, 14) and the insulation layer(16) without being affixed to the insulation.