B-Line Eaton series strut channel, .81" channel height, 120" channel length, 1.62" channel width, Steel, 14 Gauge, S hole pattern, B54 channel type, D

The B54 channel measures 1.62 inches wide by .81 inches high, which is the half-height version of the common 1-5/8 inch strut profile. Because the open face is the full 1-5/8 inch nominal width, standard 1-5/8 inch strut nuts, spring nuts, clamps and fittings seat in it the same way they do in full-height 1-5/8 x 1-5/8 channel. What changes is the depth: at .81 inches the channel has less back-to-face room, so deep fittings meant for full-height strut may bottom out.

Half-height channel at .81 inches deep is the choice for light and medium duty work: single or double runs of small conduit, cable tray supports, strut trapeze with modest spans, and wall-mounted pipe runs where the fitting depth is short. Go to full-height 1-5/8 x 1-5/8 channel when spans get long between supports or the load is heavy, such as large diameter conduit banks or mechanical piping, because the deeper section carries more load over the same span. The B54 also saves projection where you are tight to a wall or ceiling.

S is the slotted back pattern, so the channel arrives with a continuous series of slots punched through the back web rather than a solid back. That lets you bolt the strut to a wall, deck or beam anywhere along its run without drilling, and it lets threaded rod or hardware pass through the back. If you want a solid back for a cleaner face or full section strength, that is a different channel designation, not the S version.

DURA GREEN is Eaton B-Line's green painted corrosion resistant coating over the 14 gauge steel, and it is the standard finish for general indoor and sheltered industrial work such as mechanical rooms, plant interiors and covered service areas. For direct weather exposure, wash-down or coastal work, buyers normally specify a hot dip galvanized or stainless channel instead. Also keep in mind that cutting the strut on site exposes bare steel at the cut end, so field cuts should be touched up.

Order Eaton B-Line part number B54S-120GRN. That breaks down as B54 channel type, S for the slotted back, 120 for the 120 inch length, and GRN for the DURA GREEN finish. Distributors matching a spec should quote that full string, since the same B54 profile is also produced in other lengths and finishes.

No. B54S-120GRN is the bare 120 inch channel only. Spring nuts or strut nuts, bolts, end caps, closure strips, post bases, brackets and beam clamps are all separate line items, so build them into the order or the job stalls at install. For the slotted back pattern you can fasten straight through the web with the anchor or lag appropriate to your substrate.

14 gauge steel is the standard commercial weight for strut channel and is what most electrical conduit racks, cable tray hangers and equipment supports are built from. Lighter 16 gauge strut exists for signage and light bracketry, and heavier 12 gauge is used where a single member has to span farther or carry more. For a trapeze, the deciding factor is usually the span between hanger rods more than the gauge, so size the span to the load rather than assuming gauge alone solves it.