B-Line Eaton series strut back-to-back welded channel, .81" channel height, 120" channel length, 1.62" channel width, Steel, 14 Gauge, B54 channel typ

The Eaton B-Line B54A-120GLV is two shallow channel sections welded back to back, so the open slots face opposite directions. That gives you a nut-and-bolt attachment surface on both faces of the same run, which is what you want for trapeze hangers, double-sided rack mounting, or a post that carries equipment on either side. Overall it measures .81 in height by 1.62 in width over a 120 in length.

Pre-galvanized is a mill-galvanized coating applied to the steel before forming, so the cut ends and weld points are left bare. It's intended for dry interior use, mechanical rooms, and covered areas. For rooftops, exterior runs, wash-down areas or corrosive environments, step up to a hot-dip galvanized or stainless strut instead.

The channel is 1.62 in wide, which is the nominal 1-5/8 inch strut slot opening, so standard 1-5/8 in strut nuts, spring nuts, clamps and fittings seat in it. What the shallow .81 in depth changes is nut style: deep channel nuts with long springs made for 1-5/8 in deep channel will not fit the half-height section, so order the short/shallow-channel nuts.

Yes, 14 gauge steel channel cuts with a bandsaw, chop saw with an abrasive or metal-cutting blade, or a portable band saw. Since the coating is pre-galvanized and applied before forming, every cut leaves raw steel at the end, so touch up cut ends with a cold galvanizing compound if the run is anywhere with moisture.