B-Line B22SHA-120GRN Eaton series strut back-to-back welded channel, 1.62" channel height, 120" channel length, 1.62" channel width, Steel, 12 Gauge, SHA hole pattern, B22 channel type, DURA GREEN

B22 is the back-to-back welded configuration: two 1-5/8 strut sections welded spine to spine, so the finished profile measures 1.62 in by 1.62 in and runs 120 in long. That gives you an open slot facing both directions on the same run, which is what you want for a trapeze support carrying conduit or pipe on the top and the bottom, or for a rack upright that has to accept fittings from either side. A single-sided channel gives you one usable face; this one gives you two.

SHA is a slotted-hole pattern punched in the back of the channel, and on the B22SHA-120GRN it is punched in both welded halves. The practical difference from solid-back strut: you can through-bolt to a beam, a deck, or a wall anchor anywhere along the 120 in run without drilling on site, and the slots give you a little adjustment to square the run up. If your layout calls for a plain unpunched back, SHA is the wrong suffix and you want the solid-back version of B22 instead.

Yes. B22 is built from 1-5/8 in strut sections welded back to back, and each half keeps the standard 1-5/8 open slot, so the usual spring nuts, channel nuts, pipe straps, conduit clamps, and beam clamps sized for 1-5/8 strut engage it on either face. The welded pair is 1.62 in across, which is that same 1-5/8 dimension. What changes with B22 versus a single channel is the fittings that wrap the outside of the section: end caps, closure strips, and post bases have to be picked for the back-to-back profile, not the single.

12 gauge steel is the standard structural weight for B-Line strut, and this is the heaviest common wall thickness in the line, not the light-duty 14 or 16 gauge used for small single-run supports. Doubled up in the back-to-back welded form, a 1.62 by 1.62 in B22 section is what gets specified for trapeze spans and rack uprights rather than a single 1-5/8 channel. Load capacity depends on span and support spacing, so size it off the engineer's load table for the span you are running.

DURA GREEN is Eaton B-Line's green painted coating over the steel channel. It is a coated finish, not stainless and not hot-dip galvanized, so it suits dry interior work: mechanical rooms, electrical rooms, plant interiors, ceiling spaces. For a wet, washdown, corrosive, or exterior run you want a galvanized or stainless channel instead of the painted DURA GREEN version. Field cuts on a 120 in stick expose bare steel at the end, so touch up the cut if the environment is at all damp.

The channel ships as a 120 in stick and is cut to length in the field with a bandsaw, chop saw with a metal blade, or portable band saw. Nothing mounts it on its own: plan on channel nuts or spring nuts, the bolts and washers to suit, and the fittings for your layout, plus the anchors or rod for the structure. The SHA slotted back lets you through-bolt directly to structure at the slots, which saves drilling the 12 gauge steel on site. Deburr and touch up cut ends, since the DURA GREEN paint stops at the cut.

Match on three things, not just the color. The part is Eaton B-Line B22SHA-120GRN: B22 back-to-back welded channel, SHA slotted hole pattern, 12 gauge steel, DURA GREEN finish, 120 in long. If the existing run is a single channel rather than a welded pair, or has a solid back instead of SHA slots, this will not look or bolt up the same even though the green matches. Compare the stamped part number on the installed strut where you can find it.