Abstract: A pair of opposed clamp halves for circumscribingly engaging a sprinkler head supporting pipe are attachable to one another about the pipe and include anchor plates at the distal ends for attachment to an anchor point. The proximal ends of the clamp halves define a pair of ramps tapering in opposed directions. Each of first and second wedges engages one of the pair of ramps. A threaded member, threadedly interconnecting the wedges, draws the wedges toward one another to urge the proximal ends of the clamp halves toward one another into gripping engagement with the circumscribed pipe through the wedging action mainfested by the pair of ramps.

Abstract: A system for mounting a branch pipeline and sprinkler head assembly of a fire extinguisher sprinkler system to structural elements above the ceiling of a building in a manner which allows the sprinkler head to be vertically adjusted relative to the plane of the ceiling. The mounting system includes an anchor bracket which attaches the horizontal pipe of the branch pipeline to a structural element and a clamp which is attached to a structural element and is selectively operable for gripping and releasing the vertical pipe of the branch pipeline to allow vertical adjustment of the sprinkler head and hold it immobile subsequent to the vertical adjustment. The clamp is of special configuration which allows it to be operated in response to an operating force which is applied thereto in a direction parallel to the vertical pipe through a sprinkler head clearance hole formed in the ceiling.