B-Line B22A-120SS6 Eaton series strut back-to-back welded channel, 1.62" channel height, 120" channel length, 1.62" channel width, 12 Gauge steel, B22 channel type, Stainless steel type 316

B22 is two standard 1-5/8 inch channels welded back to back, so the profile measures 1.62 inches by 1.62 inches with a slotted face on two opposite sides. That gives you mounting surfaces facing both directions and roughly double the section of a single channel, which is what you want for trapeze hangers, freestanding pipe racks and longer unsupported spans. A single channel is the cheaper, lighter choice when you only need to fasten in one direction against a wall or deck.

For salt air, chlorides, pool rooms, food plants and chemical wash-down areas, yes. The B22A-120SS6 is type 316 stainless, the grade with molybdenum added for chloride pitting resistance, which is where hot-dip or pre-galvanized strut eventually breaks down. If the run is indoors, dry and climate controlled, 316 is more corrosion protection than the job needs.

It is 12 gauge steel, the standard heavy-duty strut thickness. Because the profile is the ordinary 1-5/8 inch channel form, standard 1-5/8 inch strut nuts, spring nuts, clamps and fittings seat in the slots normally. For a stainless installation, match the hardware: use 316 stainless channel nuts and bolts so you do not create a dissimilar-metal corrosion point on the part you paid for stainless to protect.

The manufacturer part number is B22A-120SS6, from the Eaton B-Line strut line. The suffix breaks down as B22 profile, 120 inch length, SS6 for type 316 stainless. It ships as a single channel length, not a kit, so order nuts, bolts, fittings and pipe clamps separately.

It arrives already welded as one back-to-back unit, so there is no field assembly and no clamping two sticks together to build up the section. That saves labor on rack posts and trapeze members where you would otherwise be bolting pairs of single channel at intervals.

Yes, 12 gauge steel channel cuts with a bandsaw, abrasive chop saw or portable saw. Two cautions with 316: use cutting wheels and files kept for stainless only, since carbon steel debris embedded in the surface will rust and stain the run, and treat the fresh cut end, which is the spot most likely to show corrosion.