B-Line B22TH-240HDG Eaton series strut channel, 1.62" channel height, 240" channel length, 1.62" channel width, Steel, 12 Gauge, TH Hole pattern, B22 channel type, Hot-dipped galvanized

Hot-dipped galvanized is the finish spec'd for exterior, rooftop, parking structure and wash-down areas, because the zinc is applied after forming and coats cut edges and punched holes. Plain or pre-galvanized strut is the indoor-dry option. The base metal here is steel, so keep cut ends touched up with a cold galvanizing compound after field cuts.

TH is a knockout/hole pattern punched through the channel back rather than a solid back. It lets you through-bolt or hang threaded rod without drilling in the field, which speeds up trapeze and rack assembly. If you need an unpunched back for a continuous clamping surface, TH is the wrong suffix.

12 gauge is the heavy-duty standard strut thickness and is what most electrical trapeze and equipment support details call for, as opposed to the lighter 14 or 16 gauge material used for light hanging. Combined with the full-depth 1.62 in B22 section, it is the section contractors use for multi-run conduit racks and rooftop pipe supports.

No. B22TH-240HDG is the bare channel only, a 240 in length of 12 gauge hot-dipped galvanized steel strut. Channel nuts, threaded rod, conduit clamps, end caps and fitting brackets are ordered separately to suit the hanging method.

Order by the full part code. B22TH-240HDG breaks down as B22 channel type, TH hole pattern, 240 in length and HDG for hot-dipped galvanized. Keeping the B22 and HDG portions consistent across a site means the same fittings and the same corrosion rating on every run; changing only the length suffix gets you a shorter stick of the identical section.

It ships as a single 240 in stick and is cut to length on site with a bandsaw, chop saw with a metal blade, or portaband. Because the finish is hot-dipped galvanized, any cut face loses its zinc, so cut ends should be coated before the piece goes into a wet or exterior location.