B-Line Eaton series Grip Strut four diamond plank, 144" Grating length, 9.5" Grating width, Steel, 2" Channel size, Plain, Grip Strut, 12 gauge steel

The B-Line Grip Strut four diamond plank is listed as OSHA compliant, and the diamond-pierced surface is what does it: the openings shed liquid, ice and debris instead of holding them, and the raised serrated edges bite into boot soles from any direction. That is why it gets specified for mechanical platforms, catwalks and stair treads where slip resistance is a code issue rather than a preference.

Plain means bare, uncoated steel, no galvanizing or paint. It is fine for dry interior use, mechanical rooms and covered platforms, but bare steel will rust in weather or in a washdown area. For exterior or wet locations, order a galvanized or painted Grip Strut plank instead, or plan to prime and coat this one after cutting.

At 5.4 lb, a full 144 inch plank is a one-man carry and can be handed up a ladder or through a hatch without rigging. That is the practical advantage of 12 gauge formed steel plank over bar grating on retrofit work in occupied buildings.

Four diamond plank is the choice when you want a finished walking width out of a single piece and a light, field-cuttable product. The 9.5 inch plank with 2 inch channel legs is self-supporting between framing members and drops straight onto steel angle or channel supports. Bar grating is the answer instead when you need heavy rolling loads or very long unsupported spans. For a walk-only maintenance route, the plank is simpler.

Order Eaton B-Line part number 42012 12 BL. That is the four diamond plank, 144 inch length, 9.5 inch width, 2 inch channel, 12 gauge plain steel.

Figure 2 inches. The plank's channel legs are 2 inches deep, so the walking surface sits 2 inches above whatever you land it on. Worth checking against door thresholds, curb heights and handrail height at platform edges before you set your supports.