B-Line Eaton series strut back-to-back welded channel, .81" channel height, 120" channel length, 1.62" channel width, Aluminum, 14 Gauge, B54 channel

B54 is the shallow back-to-back welded profile at 1.62 in wide by .81 in tall. The 1.62 in width matches the common 1-5/8 in strut face, so standard 1-5/8 strut nuts, fittings, and clamps sized to that width engage the slot. The .81 in depth is the half-height version, not the full 1-5/8 in deep channel, so verify depth-sensitive fittings before ordering.

This B54 channel is formed from aluminum rather than steel, which is why contractors pick it for wash-down areas, coastal exteriors, water treatment plants, and food processing spaces where galvanized steel eventually rusts at cut ends. Aluminum will not rust, weighs far less for the same span, and needs no field touch-up where you saw the stick. Where the run carries heavy mechanical load, steel strut is still the stronger choice.

Back-to-back welded means two channel sections are already joined along their backs at the factory and shipped as one piece, so there is no field assembly, no splice plates, and no bolting two single sticks together on the job. You get a symmetrical member with a usable slot on both faces, which is what you want for trapeze hangers and double-sided mounting runs.

No. The B54A-120AL is sold as the channel alone, a single 120 in welded back-to-back aluminum member. Strut nuts, threaded rod, beam clamps, post bases, conduit clamps, and end caps are all ordered separately, so plan those into the same order if you are building out a hanger run.

Yes. The B54A-120AL ships as a 120 in stick and is meant to be cut to length in the field. Aluminum cuts cleanly with a chop saw and a non-ferrous blade, and because the material is aluminum there is no galvanizing to burn off and no cut edge to cold-galvanize afterward.