Abstract: An improved building panel erection bracket includes a panel lifting plate which is rotatable and retractable. The panel erection bracket permits a building panel to be fixed into the final position thereof before the erection bracket is detached from the panel.

Abstract: A movable insulation puncher includes lancing elements which are used to define slots for receiving shear connectors in a multi-layer panel. The lancing elements are heated by gas burners and are moved along a panel on a carriage, and toward a panel by a crank assembly. Return to a neutral position of the lancing elements is spring assisted, and the carriage can be used to store tools, or to support a workman.

Abstract: An attachment for attaching a precast concrete wall panel to a building in a manner which permits vertical movement of that wall panel relative to building structural elements. In one embodiment, the attachment includes inserts embedded in the wall panel near the top and bottom edges of the upright wall panel, a tongue element connecting the top inserts to a building beam, or the like, and a clamp attached to the bottom inserts to connect those inserts to a building foundation. The inserts have slots defined therein in which portions of the tongue and clamp are located to permit the wall panel and building to move vertically with respect to each other.

Abstract: A reinforced insulated concrete building panel has an inner layer of concrete and an outer layer of concrete, with a layer of insulating material sandwiched therebetween. Shear connectors are embedded in the layer of concrete and extend from the outer layer through the layer of insulation and into the inner layer to prevent delamination of the panel during handling. The shear connectors have projecting portions defining a depth gauge to indicate when the connector has been inserted a proper distance into the panel during construction of the panel.

Abstract: A device for lifting large concrete panels. The device includes gripping jaws pivotally attached to a main lifting beam to transmit lifting forces to the panel being hoisted in a manner which will not crush or otherwise damage the panel. The device is amenable to adjustment for providing the most expeditious lifting technique.