B-Line Eaton series Grip Strut stair tread, 432" Grating length, 9.5" Grating width, Steel, 2" Channel size, Mill-galvanized, Stair tread, 14 gauge

The Grip Strut tread, model T42014N 36 GL, has a 9.5 inch grating width (the tread depth underfoot) and a 432 inch grating length. Mounted at 2 inches high with a 2 inch channel size, so it sits proud of the stringer by that depth. Check your stringer-to-stringer opening against the length before cutting or ordering.

Yes, the Grip Strut stair tread is listed as OSHA compliant. The pierced, serrated grip surface is what does the work, giving non-slip footing where a smooth plate tread would be a hazard, which is the main reason facilities specify it for plant stairs, catwalk access and exterior egress stairs.

To match existing steps, three numbers have to line up: the 9.5 inch grating width, the 2 inch channel size, and 14 gauge material. Get those right and the new tread sits at the same height and depth as the old one, so riser spacing on the stair does not change. Finish is mill-galvanized, so it will read as bare silver-grey steel next to any painted treads already in place.

Mill-galvanized steel is the finish here, which is zinc coating applied to the coil before forming. That handles normal exterior and damp industrial exposure, but the cut edges and pierced openings are left bare steel, so for coastal, wash-down or chemical exposure a hot-dip galvanized or stainless tread is the better call.

14 gauge steel is the standard duty weight for Grip Strut stair treads in plant and MRO work, and the formed channel shape is what carries the load rather than sheet thickness alone. At 2 inch channel depth it is intended for normal personnel traffic on stairs and platform access. For longer unsupported spans or rolling loads, step up to a deeper channel section.

What ships is the steel tread itself, model T42014N 36 GL. Fasteners and any nosing or end connection hardware are separate, so order the bolts and washers to suit your stringer material and hole pattern along with the treads.

Grip Strut is a one-piece formed steel tread with a pierced, serrated surface, so the slip resistance is in the metal itself and there is nothing to wear off, and it drains debris and liquid. Bar grating gives a flatter, larger open surface and heavier load capacity for platforms. For personnel stairs where non-slip footing is the requirement and OSHA compliance is being checked, the Grip Strut tread is the usual specification.

Each tread is listed at 3.8 lb, light enough for a single installer to set and bolt without a lift. That matters when you are replacing treads in a live stairwell one at a time rather than dropping in a whole stair assembly.