B-Line Eaton series strut back-to-back welded channel, .81" channel height, 120" channel length, 1.62" channel width, Steel, 12 Gauge, SHA hole patter

The B52SHA-120HDG channel is hot-dipped galvanized steel, which is the finish B-Line uses for exterior, damp, and corrosive-environment runs such as rooftop equipment supports, parking structures, and wash-down areas. Plain or pre-galvanized strut is the indoor-dry choice; this one is the outdoor one.

It measures .81 inch channel height by 1.62 inch channel width, in 120 inch lengths. The B52 is two shallow B52-profile channels welded back to back, so you get an open slot face on both sides of the member instead of one open face and one flat back.

The B52 is a 1-5/8 inch wide profile (1.62 inch stated width), so it takes the standard 1-5/8 inch strut nuts, clamps, and fittings the trade already stocks. Height is .81 inch, which is the shallow half-height channel, so deep-throat fittings sized for 1-5/8 inch deep channel are not what you want here.

Back-to-back welded channel is what you go to when a single strut deflects too much over the span, or when you need to bolt hardware to both faces of the same member. Typical uses are trapeze hanger cross members, freestanding racks, and pipe or conduit supports on longer spans. For a short single run of conduit clamps against a wall or deck, a single channel is the simpler and lighter choice.

SHA is B-Line's slotted hole designation, punched along the channel so you can slide fittings, nuts, and hanger rods to position rather than drilling on site. If your drawing calls out solid (unpunched) channel, this is not that part.

12 gauge steel, and a 120 inch stick weighs 23.8 lb. That weight matters when you are calculating hanger rod loading on a trapeze or figuring how many sticks a crew can carry up a lift at once.

Yes, it ships as a 120 inch stick and is routinely cut to length on site. One thing to plan for: cutting hot-dipped galvanized steel exposes bare edges, so touch cut ends up with a cold galvanizing compound if the run is outdoors or in a corrosive area.