B-Line Eaton series Grip Strut stair tread, 288" Grating length, 4.75" Grating width, Steel, 1.5" Channel size, Mill-galvanized, Stair tread, 12 gauge

The Grip Strut tread measures 288 inches long by 4.75 inches wide, with a 1.5 inch channel height. That 24 foot length is a stock mill length, not a pre-cut stair riser, so plan on cutting it to your tread width on site. At 4.75 inches wide, a single run covers the nose of the step; deeper treads take two or more runs side by side.

Yes, the Eaton B-Line Grip Strut tread is listed as OSHA compliant and is made for safe, sturdy footing where a non-slip walking surface is required, which is what plant catwalks, mezzanine stairs and equipment platforms are inspected against.

The tread is steel with a mill-galvanized finish, which is the zinc coating applied to the coil before forming. It handles normal industrial and covered exterior exposure, but the cut ends and pierced openings are bare steel after fabrication. For constant wet, coastal or chemical wash-down service, plan on touching up cut edges with a cold galvanizing compound or specifying a hot-dip or stainless option instead.

12 gauge is the thickness of the steel the tread is formed from, and it is the heavier of the common Grip Strut gauges, intended for foot traffic on stairs and walkways rather than light-duty covers. Combined with the 1.5 inch channel depth, the formed channel gives the piece its span stiffness. Span the tread between stair stringers or support angles at the spacing your structural drawings call for.

Grip Strut is a single piece of pierced and formed steel: the openings have raised serrated edges that bite through mud, ice, oil and snow, and debris falls through instead of collecting. Diamond plate holds liquid on the surface and gets slick; bar grating drains but has a flat bearing bar edge underfoot. Where a non-slip walking surface is the requirement, the formed channel plank is the usual answer, and this one is OSHA compliant.

What you order under part T21512 24 GL is the formed steel plank itself, 288 inches long. Stair nosings, end closure plates, support angles and the bolts or welds that fasten it to the stringer are separate items, so add them to the same order if the stair is being built from scratch.

Order Eaton B-Line part T21512 24 GL. That covers the 12 gauge steel, 4.75 inch wide, 1.5 inch channel plank in mill-galvanized finish at a 288 inch length. Quote that number if you are matching existing treads on a platform so the channel profile and width line up with what is already installed.