A floor stand is disclosed for mounting an electrical box at a location above a floor between two wall studs. The floor stand has an elongate sheet metal body and at least one mounting arm attached to the body. In one embodiment, the mounting arm is bendable from a position extending lengthwise of the body to a position in which it extends generally laterally outward from the body for attachment to one of the wall studs. In another embodiment, the two mounting arms are detachable from the body and re-attachable in the stated second position. An optional cable-containment section for connection to the box-mounting section of the floor stand is also disclosed.