B-Line Eaton series Grip Strut two diamond plank, 144" Grating length, 4.75" Grating width, Aluminum, 2.5" Channel size, Grip Strut, .100" Thick

The Grip Strut two diamond plank is listed as OSHA compliant, and the diamond-pierced surface is intended for safe, sturdy footing where non-slip is required. That is the reason it gets specified for elevated platforms, mezzanine walkways, and access catwalks in plants and utility spaces.

Model 22510 12 AL is aluminum, which is the version people pick where moisture, weather, or chemical washdown would attack a painted steel plank, and where crew members have to carry 12 foot lengths up a ladder by hand. Steel versions of the same profile carry more load for the same section, so for heavy traffic or long unsupported spans in a dry interior, steel is the usual call. For exterior mezzanines, cooling towers, and wastewater catwalks, the aluminum is the one that lasts.

It is formed from 12 gauge aluminum, which is the .100 inch thickness called out in the product name. That gauge is what the load and span tables are based on, so if a drawing specifies 12 gauge two diamond plank, this is the matching part.

The diamond count describes how many rows of pierced, raised diamonds run across the walking surface, which sets the plank width. Two diamond gives the 4.75 inch width here on a 2.5 inch deep channel, so it suits narrow runs, single stair treads, and ladder or hatch landings. Wider planks are used when you want fewer pieces to make up a broad platform. The non-slip surface is the same either way.

Weight is listed at 1.31 lb, and the aluminum construction is the reason these get specified on retrofit jobs where material has to be hand carried into place. A 144 inch length is awkward more than it is heavy, so two people and a rope is still the sensible way to get it onto an elevated frame.