Abstract: A standoff attached to an outlet box on the opposite side thereof from a wall stud on which the box is mounted. The box has an open front located adjacent an opening in wallboard attached to one side of the wall stud. The standoff projects rearwardly of the box for engaging the inner surface of wallboard attached to the opposite side of the wall stud for preventing rearward movement of the box. The standoff has selectively frangible portions for adapting it for use with outlet boxes and wall studs of different depths.

Abstract: A clamp back spacer for rigid conduit or the like includes a generally flat base member having opposite upper and lower surfaces. Projection means extends outwardly from the upper surface to define a cradle for cradling the rigid conduit. Recess means in the lower surface of the base member is dimensioned for receiving the projection means on another base member. The projection means and recess means are located for reception of the projection means on one base member in the recess means of another base member when a pair of base members are reversely positioned end-for-end relative to one another in stacked relationship. The projection means and recess means are shaped for preventing relative sliding movement in all directions between a pair of stacked base members.

Abstract: A support member on an electrical floor box or the like includes an opening receiving a cover formed in two parts having mating walls defining a joining line extending across the opening. The outer peripheral walls of the cover parts on opposite sides of the joining line have outwardly extending detents releasably received in recesses in the support member. The outer surfaces of the cover parts have rabbets formed therein adjacent the opposite ends of the joining line, and abutments on the support member are received in the rabbets.