Abstract: A clamp includes first and second parts, each of the parts having a circular central section and a pair of straight extensions extending away from the circular central section in opposite directions. In the first part the holes are closed holes, while in the second part the holes are open holes, connected by slots to an upper edge of the part. Bolts may be pre-located through the closed holes, with nuts threaded onto the bolts, but not tightened. The pre-placed bolts may be received through the slots and into the open holes of the second part. The nuts may then be tightened against the second part to clamp the circular central sections on opposite sides of a circular object, such as a vertical pipe run, between the parts. According to a variant, the bolts are permanently secured to the first part so as to prevent rotation of the bolts.

Abstract: A structural clamp has a cast body with an open back portion or slot for receiving, in a hollow in the body, a threaded rod or bar to which the clamp is to be coupled. The body has one or more protrusions on at least one of the top and bottom surfaces of the body, to engage a first threaded fastener, which is threaded on the threaded rod. The protrusions operate to keep the first threaded fastener in place while a second threaded fastener is tightened against the opposite side of the body. In an alternative configuration, the structural clamp with the open slot or back end may have a threaded fastener secured in a recess or hollow in the clamp body by a clip that is snapped onto the clamp body. The clip may also aid in securing the threaded rod within a hollow in the clamp body.

Abstract: A fabricated heavy duty structure clamp hanger uses a spacer block with a primary opening threaded hole accommodating a clamp screw. The block is secured between side plates each having a notch which extends beneath the hole so that a structure flange and the like may be inserted in the notch and clamped thereto by the screw. The clamp accommodates one or more threaded rods through other primary openings or holes, which may be in one or more spacer blocks. The blocks may be fabricated from laminations and the side plates may include at least two plates on each side. The structure is utilized with swaged or peened pins or projections extending through the side plates to provide a heavy duty hanger clamp having all of the advantages of castings but none of the problems and cost.