H-STRUT Open Wide Mouth 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. For beams between 3/4"to 15/8"thick flanges. Please specify model, material and finish when ordering. Please contact us for any other clamps you may need.