A clamp assembly adapted for attachment to a tubular beam includes first and second grips, with each grip having and at least four curved fingers projecting radially from the central portion and curving generally in the same direction to respective distal ends. The grips are secured together in a complementary relationship with the distal ends of the fingers of the first grip aligning with the distal ends of the fingers of the second grip to define a first generally cylindrical aperture extending through the fingers in a first direction and a second generally cylindrical aperture extending through the fingers in a second direction. The first cylindrical aperture has a diameter that substantially corresponds to the diameter of the tubular beam to which the clamp assembly is to be clamped. The clamp assembly generally includes a flange for attaching auxiliary equipment to the clamp assembly.