Adaptive Technologies BC-2824-9 - Speaker Rigging Offset Channel Beam Clamp (9 Inch Offset)Standard, pre engineered channel style beam clamps anchor to a building's structure and offer a safe and predictable method of rigging grids and other objects from overhead. This hook style beam clamp is adjustable and mounts flush underneath the building's I Beam's flange. Use the BC 2824 series hook style beam clamp to provide a load rated overhead rigging point from structural I Beams with widths ranging between 2" and 6", 6" and 9" or 9" and 12".