Reversible Beam Clamp Beam Clamp Type C-Clamp Beam Mount Location Bottom Clamp Length 0.75 in Clamp Material Cast Iron Clamp Material Finish Electro-Galvanized Clamp Width 0.81 in For Beam Shape/Type C-Purlin H-Beam I-Beam For Threaded Rod Size 1/4 in Load Capacity 250 lb Standards ANSI/MSS-SP-58 Type 19 ANSI/MSS-SP-58 Type 23 WW-H-171 Type 23