B-Line 4D22SH-240SS4 Eaton series 4Dimension strut channel

It is steel in a type 304 stainless finish, which is what the SS4 in the part number designates. That makes it the version to specify for wet, washdown, coastal or corrosive areas where plain electrogalvanized or painted channel would rust out. If the run is indoors and dry, a plain finish channel of the same 4D22 profile does the same mechanical job for less material cost.

The 4D22 is a 2.12 inch square profile in the Eaton B-Line 4Dimension family, so use 4Dimension series nuts, clamps and fittings sized to that channel. Strut hardware is profile specific, so match the fitting to the 4D22 opening rather than assuming a fitting off a different channel width will seat. In stainless applications, pair it with type 304 stainless nuts and bolts so you do not set up galvanic corrosion against the 304 channel.

SH is the slotted hole pattern, so the back of the channel is punched along its length rather than solid. That lets you bolt the channel flat to structure, wall or deck without field drilling, and gives adjustment along the run for hanger rod and threaded rod drops. If you want an unpunched back for a cleaner look or full section strength, order the solid back version of the same 4D22 profile instead.

18 gauge. That is the lighter end of the strut range, suited to conduit runs, small pipe, cable tray supports and light equipment hanging rather than heavy mechanical loads. For heavier pipe racks and seismic bracing, step up to a thicker gauge channel in the same 2.12 inch profile.

Yes. The type 304 stainless finish is exactly what gets specified for washdown food and beverage areas, natatoriums, water treatment and coastal exterior runs where galvanized channel corrodes. Keep the gauge in mind: at 18 gauge it is for conduit, cable and light equipment support, not heavy pipe racking.

The catalog number is 4D22SH-240SS4 from Eaton B-Line: 4D22 profile, SH slotted hole pattern, 240 inch length, SS4 type 304 stainless. It is the bare channel only. Nuts, springs, brackets, clamps and threaded rod are ordered separately.

Yes, strut is routinely cut to length in the field, and the 240 inch stick is meant to be broken down into drops and trapezes. Cutting 304 stainless exposes bare steel at the cut, so deburr and treat the ends if the run is in a corrosive or washdown area, or the protection you paid for stops at the cut line.