B-Line B22S-120SS4 Eaton series strut channel, 1.62" channel height, 120" channel length, 1.62" channel width, Steel, 12 Gauge, S hole pattern, B22 channel type, Stainless steel type 304

It is type 304 stainless steel, not a plated or painted carbon channel. That is what makes the B22S a candidate for wet, washdown, coastal, or corrosive process areas where a plain electro-galvanized strut would rust out. The body is 12 gauge steel.

B22 measures 1.62 inches high by 1.62 inches wide, which is the standard 1-5/8 inch square strut profile. Fittings, nuts, clamps and hangers built for 1-5/8 inch channel will land on it.

S is the slotted back pattern, so the channel comes with slots punched through the base rather than a solid back. Use it when you want to through-bolt to structure anywhere along the run or drop threaded rod without field drilling. If you need an unpunched back for full section strength or a clean appearance, you want a solid-back channel instead.

The channel ships as bare stick only. Channel nuts and springs, end caps, angle and corner fittings, pipe and conduit clamps, and the threaded rod or anchors that tie it to structure are all separate line items. Budget those into the order, and specify them in stainless to match the 304 channel.

The manufacturer part number is B22S-120SS4 from Eaton B-Line. Read it as B22 profile, S slotted pattern, 120 inch length, SS4 for type 304 stainless. Quote that number and there is no ambiguity about gauge or finish.