B-Line B12SH-120HDG Eaton series strut channel, 2.43" channel height, 120" channel length, 1.62" channel width, Steel, 12 Gauge, SH hole pattern, B12 channel type, Hot-dipped galvanized

The B12SH strut channel is hot-dipped galvanized steel, which is the finish you want for exterior runs, parking structures, wash-down areas and other damp or corrosive environments. Plain or pre-galvanized channel is the indoor equivalent. No specific certification is carried on this channel, so if your spec calls out a named listing, match it on the submittal.

The B12 profile measures 1.62 inches wide by 2.43 inches high, which is the deep 1-5/8 by 2-7/16 back-to-back style section. The 1-5/8 inch opening width is the standard strut throat, so standard 1-5/8 channel nuts, spring nuts and strut fittings seat in it. The extra height over a shallow 1-5/8 by 13/16 channel is what gives it the added load span, not a different fitting size.

SH is the slotted-hole back pattern, so the channel back is punched on a repeating slot series rather than being solid. That lets you through-bolt to structure, hang threaded rod, or bolt channel to channel anywhere along the run without field drilling. If you need a solid unpunched back for appearance or full section strength, that is a different channel designation, not this one.

Order Eaton B-Line part number B12SH-120HDG. Reading the code: B12 is the channel profile, SH is the slotted hole pattern, 120 is the length in inches, and HDG is the hot-dipped galvanized finish. Change any of those segments and you get a different stick, so quote the full string on the PO.

Yes, 12 gauge steel channel cuts with a bandsaw, chop saw with a metal blade, or portable band saw, and the SH slotted back means you rarely need to drill after cutting. One thing to plan for on exterior work: a field cut exposes bare steel at the end, so the hot-dip coating is broken there and the cut end should be treated with a cold galvanizing compound or covered with an end cap.