B-Line Eaton series strut channel, .81" channel height, 120" channel length, 1.62" channel width, Aluminum, 14 Gauge, SH hole pattern, B54 channel typ

It's the shallow, half-height profile. The B54 channel measures .81 inch high by 1.62 inch wide, so it takes standard 1-5/8 inch channel nuts and fittings across the open face but sits roughly half as deep as a full 1-5/8 x 1-5/8 channel. Use it where you need a low-profile run for light to moderate pipe, conduit, or equipment support and don't have depth to give up.

Yes. The B54 profile is 1.62 inch wide, the standard 1-5/8 inch channel face, so channel nuts, spring nuts, conduit clamps, beam clamps, and pipe straps made for 1-5/8 strut engage the same way. Watch the depth, not the width: at .81 inch high the interior is shallow, so deep-shoulder or double-channel fittings sized for a full 1-5/8 x 1-5/8 section may bottom out.

SH is B-Line's slotted-hole back pattern, so the channel arrives pre-punched along the back for through-bolting to structure, beams, or walls without field drilling. If you want a solid back with no holes you need a plain (no-hole) B54 instead, not the SH version.

You can, but be deliberate about it. Aluminum in direct contact with dissimilar metal in a damp or exterior location invites galvanic corrosion, which is usually the reason someone specified aluminum channel in the first place. For wet or outdoor runs, pair the aluminum B54 with stainless or aluminum hardware, or isolate the joint. Indoors and dry, standard electro-galvanized strut hardware is normal practice.

Order it as Eaton B-Line B54SH-120AL. Reading the code: B54 profile, SH slotted back, 120 inch length, AL aluminum. If you need a different length or a solid back, the suffix changes, so match the full designation on your submittal.