Beam Lifting Clamp Clamp Type Beam Flange Clamp Material Steel Maximum Jaw Opening 13 1/4 in Minimum Jaw Opening 6 in Working Load Limit 20 000 lb Attachment Type Shaft Maximum Beam Thickness 1 3/4 in Compatible Beam Shape Flat Minimum Beam Thickness 6 in Attachment Diameter 1 3/4 in Beam Mount Location Bottom Top Maximum Beam Width 13 1/4 in Minimum Beam Width 6 in Overall Depth 6 in Overall Width 22 1/2 in Standards ASME B30.16 ASME B30.20 ASME BTH-1