A clamp for overhead assemblies, comprising: a clamp portion comprising a frame having first and second spaced apart side portions connected at respective ends to a top portion, the first and second side portion comprising first and second openings therethrough to form a clamp opening; a plate disposed through third and fourth openings in the first and second spaced apart side portions, respectively, the plate including a tapped recess for receiving a threaded rod; and a screw disposed in a tapped recess in the top portion, an engagement end of the screw being selectively extendible into the clamp opening to engage a structural member inserted within the clamp opening to couple the structural member to the threaded rod; a clevis portion having first and second spaced apart clevis plate portions joined at respective ends by a top clevis plate portion, the top clevis plate portion engaged with the plate, the first and second clevis plate portions having first and second openings for engaging a swivel assembly; the swivel assembly comprising a swivel clevis portion having first and second spaced apart swivel clevis plate portions joined at respective ends by a bottom swivel clevis plate portion, the first and second swivel clevis plate portions comprising first and second swivel clevis plate openings; and a fastener disposed in the first and second openings of the clevis portion and the first and second swivel clevis plate openings of the swivel clevis portion; wherein the swivel assembly is rotatable with respect to the clamp about a longitudinal axis of the fastener; and wherein the bottom swivel clevis plate portion comprises a tapped hole for receiving a threaded rod. a clamp portion comprising a frame having first and second spaced apart side portions connected at respective ends to a top portion, the first and second side portion comprising first and second openings therethrough to form a clamp opening; a plate disposed through third and fourth openings in the first and second spaced apart side portions, respectively, the plate including a tapped recess for receiving a threaded rod; and a screw disposed in a tapped recess in the top portion, an engagement end of the screw being selectively extendible into the clamp opening to engage a structural member inserted within the clamp opening to couple the structural member to the threaded rod; a clevis portion having first and second spaced apart clevis plate portions joined at respective ends by a top clevis plate portion, the top clevis plate portion engaged with the plate, the first and second clevis plate portions having first and second openings for engaging a swivel assembly; the swivel assembly comprising a swivel clevis portion having first and second spaced apart swivel clevis plate portions joined at respective ends by a bottom swivel clevis plate portion, the first and second swivel clevis plate portions comprising first and second swivel clevis plate openings; and a fastener disposed in the first and second openings of the clevis portion and the first and second swivel clevis plate openings of the swivel clevis portion; wherein the swivel assembly is rotatable with respect to the clamp about a longitudinal axis of the fastener; and wherein the bottom swivel clevis plate portion comprises a tapped hole for receiving a threaded rod.