B-Line Eaton series strut channel, .81" channel height, 120" channel length, 1.62" channel width, Steel, 14 Gauge, S hole pattern, B54 channel type, H

The B54S-120HDG strut is hot-dipped galvanized steel, which is the finish specified for exterior, damp, and corrosive environments such as rooftops, parking structures, tunnels, and wash-down areas. Plain or pre-galvanized channel is the indoor-only option. Cut ends still expose bare steel, so field cuts should be touched up with a cold galvanizing compound.

The open face of B54 is 1.62 inches wide, the same 1-5/8 inch nominal opening as standard strut, so spring nuts, channel nuts, pipe straps, and clamps sized for 1-5/8 inch channel engage the lips. What differs is depth: at .81 inches the channel is half-height, so deep-throat fittings or anything that relies on a full 1-5/8 inch interior will not seat.

S is the slotted back pattern: the channel back is punched with a repeating run of slots rather than left solid. That lets you bolt the strut to structure, thread all-thread through the back, or run hardware from behind anywhere along the 120 inch stick without drilling on site. If you need an unpunched back for a continuous bearing surface, you want the solid-back version of B54 instead.

Order Eaton B-Line B54S-120HDG. Read the number as B54 channel type, S slotted hole pattern, 120 inch length, HDG for hot-dipped galvanized. If a drawing calls out a different suffix, that is a different finish or punch of the same B54 profile.

No. B54S-120HDG is the bare 120 inch channel stick only. Channel nuts, hardware, end caps, brackets, and fittings are ordered separately, and for an exterior job they should be specified in a galvanized or stainless finish to match the hot-dipped galvanized channel and avoid mixing metals.