B-Line Eaton series strut back-to-back welded channel, 1.37" channel height, 240" channel length, 1.62" channel width, Steel, 12 Gauge, B32 channel ty

B32 is a back-to-back welded channel: two 1.37 inch deep channel sections welded spine to spine, giving an open slot on both faces. That lets you bolt fittings on either side of the same run, which is what you want for trapeze hangers, freestanding racks and pipe supports that need hardware attached front and back.

Pre-galvanized (mill galvanized) steel is intended for indoor and protected dry locations. The zinc coating handles normal building interiors, but cut ends are left bare and the coating is thinner than hot-dip. For exterior runs, parking structures, wash-down areas or corrosive process rooms, specify a hot-dip galvanized or stainless channel instead.

Each 240 inch stick weighs 69.34 lb. That is a two-man lift at full length and it matters for overhead work: figure the dead load of the strut itself into your trapeze and threaded rod sizing before you add conduit or pipe.

Single channel is the usual pick for short trapeze spans and light conduit racks. Step up to the B32 back-to-back welded section when the span is long, the load is heavy, or you need to mount hardware on both faces of the member. The welded pair is roughly twice the depth at 1.37 inches per channel and stiffens the run considerably over a single stick of the same 12 gauge steel.

Yes, 12 gauge steel channel cuts with a bandsaw, chop saw with a metal blade, or portaband. Because the finish is pre-galvanized rather than hot-dip, the cut end exposes bare steel, so touch it up with a cold galvanizing compound if the run is anywhere damp.