ABB Installation Products' Superstrut Metal Framing
ABB Installation Products’ Superstrut metal framing has half-slot holes punched on three sides to allow installers to make side-to-side strut connections or attach various side-mounted accessories without performing custom drilling. The pregalvanized 12-gauge steel strut is available in 10- or 20-ft. lengths. Holes are drilled every two inches, center to center and are 9/16 in. wide.