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

B22 is a back-to-back welded channel, meaning two channel sections are welded spine to spine to form a closed box profile with slots facing out on both sides. The B-Line B22A-120AL measures 1.62 inches high by 1.62 inches wide in 12 gauge aluminum. A single channel gives you one mounting face; the back-to-back section gives you two opposing faces and much greater resistance to bending, which is why it gets used for trapeze uprights, freestanding racks, and long unsupported spans rather than simple wall mounting.

B22 uses the standard 1-5/8 inch channel profile, listed here as 1.62 inches wide and 1.62 inches high per side, so the slot opening and lip take the same 1-5/8 inch strut nuts, spring nuts, conduit clamps, pipe straps and fittings you already stock for steel strut. The difference is material, not geometry. Where the aluminum matters is fastener choice: pair it with stainless or aluminum hardware in wet locations so you do not set up galvanic corrosion at the connection.

Order it as Eaton B-Line B22A-120AL. The number breaks down as B22 channel type, A for aluminum, 120 for the 120 inch length. That is the full identity of the part, there are no separate finish or length options to specify against it.

Back-to-back B22 is the section normally used for trapeze work, because the welded double profile resists bending across the span far better than a single channel, and the slots on both faces let you clamp conduit on one side and pick up the threaded rod on the other. In aluminum at 12 gauge it keeps the dead load down on the rod and the anchor. Size the span and rod against the load you are actually hanging, since aluminum carries less than the same profile in steel.

Yes. 12 gauge aluminum cuts cleanly with a chop saw and a non-ferrous or carbide blade and drills far easier than steel of the same gauge. Deburr the cut end, because the back-to-back welded B22 section leaves two channel lips exposed at the cut. Cut ends have no coating to touch up, which is one of the practical advantages of ordering aluminum rather than painted or galvanized steel.