B-Line Eaton series Grip Strut stair tread, 288" Grating length, 7" Grating width, Steel, 1.5" Channel size, Mill-galvanized, Stair tread, 12 gauge

It is a 288 inch long Grip Strut stair tread with a 7 inch tread width and a 1.5 inch channel depth, formed from 12 gauge steel. At 24 feet of length it is a full stock length meant to be cut to your riser width, not a pre-cut single step.

The Grip Strut tread is listed as OSHA compliant and is intended for non-slip footing on stairs and platforms. The pierced, serrated surface is what gives the slip resistance, so it suits plant catwalks, mezzanine stairs and mechanical platforms where a smooth plate tread would not pass.

The finish is mill-galvanized steel, which is a zinc coating applied to the coil before forming. That handles damp interior plant areas, covered exterior stairs and general industrial exposure. Cut ends and pierced edges are bare steel after fabrication, so in a constantly wet or corrosive environment expect edge rusting unless you touch up with a zinc-rich coating.

The channel depth is 1.5 inches, so the tread sits that far above the stringer seat or support angle it is fastened to. Work that into your riser layout before fabricating the stringers, otherwise the top and bottom risers come out uneven.

A single 7 inch wide plank gives a narrow step depth. On industrial stairs it is common to run two planks side by side per tread to build out the run, or use the 7 inch width alone on ship ladders and access steps. The 1.5 inch channel depth is the same either way, so pairing them keeps the walking surface flush.

The item is the 12 gauge steel plank itself. Bolts, end carrier plates and any nosing are separate, so add fasteners and support angles to your order when you are building out a stair run.

The stated product weight is 4.1 lb. It is light enough for one person to carry cut sections up a stair tower, though a full 288 inch piece is awkward for one man because of its length rather than its mass.