B-Line B24A-120SS4 Eaton series strut back-to-back welded channel, 1.62" channel height, 120" channel length, 1.62" channel width, Steel, 14 Gauge, B24 channel type, Stainless steel type 304

It is type 304 stainless steel, 14 gauge. That makes it suitable for wet, washdown and corrosive environments where painted or plain galvanized strut would rust out. If your run is dry interior only, a cheaper finish will do the same structural job.

The B24A uses the 1-5/8 inch square channel opening, so spring nuts, channel nuts, pipe clamps and fittings made for 1-5/8 inch strut engage it normally. For a 304 stainless channel, spec your nuts, bolts and clamps in stainless too, otherwise the plated steel hardware corrodes first and you lose the reason you bought stainless.

Back-to-back means two channel sections welded together along their backs, giving you an open slot facing both directions and roughly double the stiffness of a single stick. Use it for trapeze hangers, long unsupported spans, and posts or uprights where you need to mount hardware on two faces. For a short wall-mounted run of conduit or a single pipe clamp, ordinary single-sided strut is the simpler pick.

Order B-Line B24A-120SS4. The B24 designation is the channel type, 120 is the length in inches, and SS4 identifies the type 304 stainless material.

28.84 lb per 120 inch length. Worth knowing before you plan hand-carry to a roof or size out a bundle for a truck load, since back-to-back strut is about twice the weight of a comparable single channel.

Yes, strut is routinely cut to length in the field, and the 14 gauge wall cuts with a bandsaw or abrasive chop saw. On 304 stainless, deburr the cut and keep carbon steel blades and grinding dust off the surface, since embedded carbon particles are what start rust on an otherwise clean stainless run.