Polar Focus - Used for level I beam with vertical loading. Fits I beams with a flange width from 2.95 to 9.05 inches. Maximum flange thickness is 0.79 inches. WLL = 4400 pounds. [break] Polar Focus® Rigging Beam Clamps are good for simple attachment to the bottom of a level I beam. They are commonly used to support 1 ton chain hoists when the top of an I beam is covered over by architectural material, thereby blocking the use of a sling over the top of the beam. [break] These clamps are designed for flat and level beam applications only. Designed for standard S and wide flange W beams. For most applications, chain slings will have a lower cost than beam clamps. [break] See the Polar Focus PY1 Quick Disconnect Fitting for solutions that allow an easy connection between the line array frame and line array accessories, for infinite adjustability with our Motor Zbeam and associated products. [break] Pro audio rigging design, roof attachment, supplemental structure, sales, support and PE stamped drawings in any US State provided by Polar Focus. Call us today for more information at (413) 586-4444.