Square 8” x 6” U-Bolt Set FCAVCSU80 This set of two U-Bolts can attach the FCAVCA to rectangular columns and I-Beams Features: Designed to be mounted to 8” (20cm) concrete columns or 8" (20 cm) steel I-beams Specifications: Notes Column Dimensions: 8” x 4” maximum (20 x 10 cm)