US Patent 7673841 Hangar bar for recessed luminaires with integral nail

A hangar bar assembly for a recessed luminaire is disclosed. The hangar bar assembly includes a first hangar bar member having a first attachment structure disposed on an end thereof, and a second hangar bar member having a second attachment structure disposed on an end thereof, the second hangar bar member being adjacent to the first hangar bar member. The first and the second attachment structures each include a first wall having a first fastener aperture and a second wall having a second fastener aperture, the first and second fastener apertures being formed about a common central longitudinal axis.