Beam Lifting Clamp Clamp Type Beam Flange Clamp Material Steel Maximum Jaw Opening 7 1/2 in Minimum Jaw Opening 3 in Working Load Limit 20 000 lb Attachment Type Shaft Maximum Beam Thickness 7/8 in Compatible Beam Shape Flat Minimum Beam Thickness 3 in Attachment Diameter 7/8 in Beam Mount Location Bottom Top Maximum Beam Width 7 1/2 in Minimum Beam Width 3 in Overall Depth 3 in Overall Width 12 1/4 in Standards ASME B30.16 ASME B30.20 ASME BTH-1