H-STRUT Top Beam Clamps are designed to secure all H-STRUT 1-5/8"wide channels, or threaded rod, to beams or supports for the purpose of running piping, conduit or tubing. All H-STRUT fittings are manufactured from 1/4"thick carbon steel or cast malleable iron. Recommended for use under roof installations with bar joist type construction where thickness of joist does not exceed 5/8 inch. Specify model, rod size and finish when ordering. Please contact us for any other clamps you may need.