B-Line B24SH-120SS4 Eaton series strut channel, 1.62" channel height, 120" channel length, 1.62" channel width, Steel, 14 Gauge, SH hole pattern, B24 channel type, Stainless steel type 304

The B24SH-120SS4 is steel in a Type 304 stainless finish, 14 gauge. That is the material and finish combination B-Line publishes for this channel. For wet, washdown, coastal or chemically aggressive areas, Type 304 is the usual choice over plain pre-galvanized strut.

B24 channel measures 1.62 inches high by 1.62 inches wide, which is the nominal 1-5/8 inch strut profile. Fittings, nuts, clamps and brackets made for 1-5/8 inch channel seat in that opening. Keep the hardware in stainless too if you picked this channel for a corrosive location, since mixing plated steel nuts into stainless strut defeats the reason for buying it.

SH is B-Line's slotted-hole designation, so the B24SH-120SS4 arrives with a pre-punched slot pattern in the back rather than a solid back. Slots let you through-bolt the channel to structure anywhere along the run and give you some adjustment without drilling on site. If you want an unpunched back for a cleaner look or full section strength, you need a solid-back B24 instead of the SH version.

Pick the Type 304 stainless channel, like the B24SH-120SS4, where the strut sees moisture, cleaning chemicals, food processing washdown or salt air. Pre-galvanized strut is the cheaper choice for dry indoor mechanical rooms and plenums and is fine there. The trade-off is cost and hardware: once you go stainless you should carry stainless channel nuts and bolts through the whole assembly.