B-Line B22A-120YZN Eaton series strut back-to-back welded channel, 1.62" channel height, 120" channel length, 1.62" channel width, Steel, 12 Gauge, B22 channel type, Yellow zinc chromate

The B-Line B22A is two B22 channels welded back to back, giving a closed box section measuring 1.62 inches in height and 1.62 inches in width with slots facing opposite directions. Single B22 channel has one open slotted face and a flat back that sits against a wall or structure. Use the back-to-back version where you need to hang or mount from both sides, or where a single channel would deflect too much on a long span, such as trapeze supports and free-standing racks. For simple wall-mounted conduit runs, single channel is the usual choice.

The B22A-120YZN is 12 gauge steel with a yellow zinc chromate finish. Yellow zinc chromate is a plated coating intended for dry indoor and protected service, not for direct weather exposure, wet process areas, or corrosive environments. For exterior runs, roof-top supports, or wash-down areas, specify a hot-dip galvanized or stainless channel instead.

The B22A is built from B22 profile channel at 1.62 inches across the face, which is the nominal 1-5/8 inch strut size. Standard 1-5/8 inch channel nuts, straps, clamps, and fittings engage the slot on either face. Bear in mind the overall section is 1.62 by 1.62 inches, so fittings that wrap the channel, such as post bases and some brackets, need to be sized for the deeper back-to-back section rather than a single 1-5/8 by 13/16 stick.

12 gauge is the standard heavy-duty strut thickness, and pairing it in the welded back-to-back B22A section roughly doubles the depth over a single channel, which is where the added stiffness on long spans comes from. It is the section commonly specified for trapeze hangers, multi-conduit racks, and free-standing equipment frames. Span and load still need to be checked against your engineer's load tables for the span you are actually running.

Order B-Line B22A-120YZN. In that designation, B22A is the back-to-back welded B22 channel, 120 is the 120 inch length, and YZN is the yellow zinc chromate finish. It ships as a single length, and cut ends should be touched up since the plating is not carried through the steel.

No. The B22A-120YZN is supplied as bare 120 inch channel only. Channel nuts, spring nuts, threaded rod, beam clamps, post bases, end caps, and any conduit clamps or pipe straps are ordered separately. Take off your fitting count before the order goes in, since a trapeze run needs nuts at every connection point.