B-Line Eaton series strut channel, 1.62" channel height, 120" channel length, 1.62" channel width, Aluminum, 12 Gauge, B22 channel

The B22 channel measures 1.62 inches across the opening face and 1.62 inches deep, which is the standard 1-5/8 inch strut profile. Fittings, spring nuts, clamps and brackets sized for 1-5/8 inch channel seat in the slot normally. Note this is the aluminum version, so pair it with stainless or aluminum hardware if you want to avoid galvanic issues in a wet or coastal location.

Yes. A stick of B22-120AL is bare channel only, with no hardware. A typical run needs spring channel nuts sized for 1-5/8 inch strut, hex bolts, end caps to close the cut ends, and either post bases, beam clamps or threaded rod with rod couplings depending on how you are hanging it. Conduit and pipe clamps are also separate. Specify aluminum or stainless accessories to match the channel material.

12 gauge aluminum. That is the standard heavy-wall strut thickness, and it is what the channel nut teeth bite into when you torque a fitting down. Thinner 14 or 16 gauge strut is made for lighter duty support; 12 gauge is what most electrical and mechanical specs call out for trapeze and rack framing.

That is a typical use for the deep 1.62 inch B22 section in aluminum, since rooftop and exterior runs are exactly where a non-rusting channel earns its place. Spans and loads have to come from the engineer or the load tables for your configuration, not from the profile alone, but the square 1.62 by 1.62 inch 12 gauge section is the heavier of the two common strut depths and is what trapeze assemblies are usually built from.

The B22-120AL is the plain, unpunched channel; the B22 designation is the profile, not a hole pattern. If you need field holes for threaded rod or anchors, you drill them, which is quick in aluminum. Where you want factory punching, that is a separate catalog suffix on the B22 series.