Fail-safe anchoring systems for cavity walls

摘要

A fail-safe wall anchor for cavity walls includes a wingnut including receptors for receiving pintles of a veneer tie. Thermally insulative material is provided to inhibit transfer of heat from the veneer tie to the wall anchor. Back up structure is provided in the event the thermally insulative material fails to maintain the structural connection between the wall anchor and the veneer tie.

主权项

1. A fail-safe wall anchor for cavity walls, the wall anchor for engaging a veneer tie, the wall anchor comprising:
a stud-type anchor having an elongated body with a driving end and a driven end; a hybrid wingnut disposed on the driving end of the stud-type anchor body, the hybrid wingnut further comprising:
a fail-safe wingnut portion with a shaftway therethrough for the stud-type anchor and with receptors for receiving the veneer tie;a fail-prone wingnut portion of molded thermoplastic with a shaftway therethrough for the stud-type anchor body and receptors for receiving the veneer tie, the fail-prone wingnut portion melting upon extreme temperature conditions and the veneer tie being securely held by the fail-safe wingnut portion, the fail-prone wingnut portion under normal operating conditions providing an in-cavity thermal break between the veneer tie and the wall anchor, wherein the fail-safe wingnut portion is of stamped metal and forms a frame, the fail-prone wingnut portion being positioned within the frame, thereby forming an exterior fail-safe wall anchor and an interior fail-prone wall anchor; and,a bolt securing the hybrid wingnut to the stud-type anchor body.