Adaptive Technologies Group BC16-21-2 Beam Clamp - 16"-21"Standard, pre engineered beam clamps anchor to a buildings beam structure and offer two very predictable off set rigging points for hanging clusters, arrays and other objects from overhead. This channel style beam clamp is adjustable and mounts flush underneath the beams flange. It comes equipped with two eye nuts, one on each side of the flange, for suspending objects from wire rope, rigging chain, spansets, etc. Use the BC16 21 2 channel style beam