Adjustable bar hanger and electrical box

摘要

An adjustable hanger bar assembly including an adjustable hanger bar having tubular inner and outer bar members, an electrical box having a top wall with a deep channel therein, and a mounting plate having one or more tensioner tangs. The inner bar member is adapted to slide within the outer bar member. The adjustable hanger bar assembly includes mounting fasteners and an interior channel in which the mounting plate is assembled. With the electrical box mounted to the hanger bar assembly by the mounting fasteners, the hanger bars are tightly held between the channel walls of the electrical box. The tensioner tangs create tension between the mounting bars, the mounting plate, and the electrical box, thereby forming a secure connection between the components that will withstand vibrational forces and prevent separation of the electrical box from the mounting bars.

主权项

1. An adjustable hanger bar assembly for securing an electrical box to an overhead support, said adjustable hanger bar assembly comprising:
an adjustable hanger bar including an inner bar member slideable within an outer bar member, said adjustable hanger bar including an interior channel; a substantially planar mounting plate including a bore therein, said mounting plate slideable within said interior channel; an electrical box including a sidewall and a top wall defining an electrical box enclosure, and a channel extending across said top wall; a tensioner tang on said mounting plate; said channel of said electrical box includes a channel bottom and channel walls; a through-hole in said channel bottom of said electrical box; a mounting screw for securing said electrical box to said mounting plate and said adjustable hanger bar; a bench extending longitudinally along said channel bottom; and a knock out wall portion in said bench.