| 摘要 |
An internally threaded insert anchor for use in poured concrete floors having a metal decking or a wood form is described which provides stability against skewing or misalignment due to rough action after being inserted into the metal deck or wood form, prior to the concrete being poured. Once locked into the concrete floor, the threaded insert anchor provides easy attachment for the support rods that carry the racks of utility, piping and ceiling grid systems for the building. Each threaded insert anchor is capable of accepting two different size rods or bolts with different thread cuts. The internal threaded apertures are protected from concrete intrusion during the pour by the plastic or metal sleeve. Moreover, the anchors are designed so that subsequent spraying of the ceiling with fire retardant or insulation foam will not penetrate into the threaded apertures, so as to prevent subsequent entry of the support rods. |
