Beam Lifting Clamp Clamp Type Beam Flange Clamp Material Steel Maximum Jaw Opening 12 in Minimum Jaw Opening 6 in Working Load Limit 11 420 lb Attachment Type Shackle Maximum Beam Thickness 1 in Compatible Beam Shape Flat Minimum Beam Thickness 12 in Overall Height 9 1/2 in Attachment Diameter 1 1/4 in Beam Mount Location Bottom Top Maximum Beam Width 12 in Minimum Beam Width 6 in Overall Depth 6 in Overall Width 19 3/4 in Standards ASME B30.20 ASME BTH-1