B-Line Eaton series strut channel, 1.62" channel height, 120" channel length, 1.62" channel width, Steel, 14 Gauge, S hole pattern, B24 channel type,

Pre-galvanized (sometimes called mill galvanized) is a zinc coating applied to the steel sheet before the channel is roll formed, so the cut ends and punched slots are bare steel. It holds up in dry interior work, mechanical rooms, and covered areas. For rooftops, exterior runs, wash-down areas, or corrosive spaces, spec a hot dip galvanized or stainless channel instead, where the coating covers the cut edges.

S is B-Line's slotted hole pattern, punched through the back of the channel along its length. It lets you bolt the strut to structure or hang it from threaded rod anywhere along the run without drilling on site, and the slots give you adjustment to square things up. If you want a solid back with no holes, that is a different channel designation, not the B24S.

B24 is a single 1-5/8 by 1-5/8 channel, not a welded back-to-back section. The 1.62 inch height tells you that directly: a back-to-back combination runs roughly double that depth. For heavier trapeze spans where deflection is the issue, step up to a deeper or doubled channel rather than running B24 further apart.

The B24 is 14 gauge steel, which is the standard duty thickness for general strut work: conduit and cable tray supports, pipe hangers, trapeze runs, and equipment mounting. Heavier gauge (12 gauge) strut exists for higher loads and longer unsupported spans. Actual capacity depends on span and support spacing, so size the run off the load table for your span rather than off gauge alone.

Order Eaton B-Line part number B24S-120GLV. Read it as B24 channel, S slotted hole pattern, 120 inch length, GLV pre-galvanized finish. That is the only configuration on this item, so there is no finish or length to select separately.

Yes. B24 is the standard 1-5/8 inch strut profile at 1.62 inches wide, with the usual inturned lips, so strut nuts, channel nuts, and clamps built for 1-5/8 channel seat in it regardless of whose name is on them. Where you do need to stay in family is the hole pattern, since the S slots set where you can bolt through the back.