B-Line B22SHA-240HDG Eaton series strut back-to-back welded channel, 1.62" channel height, 240" channel length, 1.62" channel width, Steel, 12 Gauge, SHA hole pattern, B22 channel type, Hot-dipped galvanized

Hot-dipped galvanized is the right finish for exterior runs, rooftops, parking structures, wash-down areas, and unconditioned spaces. The zinc coating goes on after fabrication and covers cut edges and welds, so it holds up far better than a pre-galvanized or painted channel in weather. For dry indoor electrical and mechanical support, plain or pre-galvanized B22 is the usual choice.

SHA is B-Line's designation for slotted holes in both sides of the channel, in addition to the open slotted face. That lets you bolt through the side walls for splices, bracing, and fitting attachment anywhere along the 240 inch length instead of drilling on site. If you only need the open face and no side holes, you want the plain (no-hole-pattern) version of the B22 instead.

It is 12 gauge steel, which is the heavy-duty strut thickness used for structural support runs rather than the lighter 14 or 16 gauge used for light fixture and small conduit work. Combined with the back-to-back welded section, this is the channel specified for trapeze hangers carrying multiple conduit runs, cable tray, and piping.

Order it as Eaton B-Line B22SHA-240HDG. Reading the code: B22 is the back-to-back welded channel type, SHA is the side hole pattern, 240 is the length in inches, and HDG is the hot-dipped galvanized finish. Change any one of those segments and you get a different stick, so the finish and hole-pattern letters are the ones to check on a submittal.

Cutting a hot-dipped galvanized channel exposes bare steel at the cut, so the end should be touched up with a cold galvanizing compound on any exterior or damp installation. The rest of the piece keeps its factory hot-dip coating. Cutting is expected here, since it ships as a 240 inch stick and most runs are field-cut.