| 摘要 |
A concrete insert for casting in a concrete wall panel, having a housing having an elongate centre portion and two opposing longitudinal sides, and two opposing longitudinal flanges. The elongate centre portion is bounded by opposing outer longitudinal bend lines, the elongate centre portion defining a longitudinally oriented nut access slot. The opposing longitudinal sides depend inwardly from the opposing outer longitudinal bend lines to opposing inner longitudinal bend lines. The opposing longitudinal flanges depend from opposing inner longitudinal bend lines transversely to the opposing longitudinal sides and extend in mutually divergent relation. The housing and the nut box insert comprise a nut box. A nut defines a threaded aperture to receive a threaded fastener through the nut access slot for attaching the concrete wall panel to the building. The nut box insert comprises at least one resilient layer carried by a compression plate for compressing the at least one resilient layer against the bottom of the nut for permitting the nut to be slidably located within the nut box and for holding the nut under pressure in a selected location in the nut box for the threaded aperture in the nut to receive the threaded fastener through the nut access slot while the nut is in the selected location. In one aspect the resilient layer comprises resilient end walls compressed against the housing by the compression plate for substantially preventing wet cement from entering the nut box during casting of the concrete panel. In another aspect the compression plate comprises end walls for substantially preventing wet cement from entering the nut box during casting of the concrete panel. |
