B-Line Eaton series Grip Strut three diamond plank, 144" Grating length, 7" Grating width, Aluminum, 3" Channel size, Grip Strut, .080" Thick

Each plank of the Eaton B-Line Grip Strut three diamond plank runs 144 inches long by 7 inches wide, with a 3 inch channel height. That 7 inch tread width is a single-plank walking surface, so for a wider catwalk or platform you set two or more planks side by side and figure your span in multiples of 7 inches.

The B-Line Grip Strut three diamond plank is listed as OSHA compliant, and the serrated three diamond surface is made for safe, sturdy footing where non-slip is required. That is what puts it on catwalks, mezzanine walkways, equipment access platforms and stair treads rather than plain sheet or plate.

This plank is aluminum, 14 gauge, .080 inch thick. Aluminum is the one to pick for wash-down areas, coastal or chemical exposure, and anywhere crews have to carry planks up a ladder, since it will not rust like plain or painted carbon steel. If the deck is taking heavy rolling loads or vehicle traffic, a steel or galvanized version of the same channel profile carries more and is the better call.

The 3 inch channel is the depth of the formed side rails running the length of the plank. It sits flange-down across your support steel, so the rails carry the load and the diamond tread stays flush at the top of the walking surface. Lay the 144 inch length across supports and fasten through the channel legs at each bearing point.

Order it as Eaton B-Line model 33012 12 AL. That covers the three diamond plank in aluminum, 144 inches long, 7 inches wide, 3 inch channel, .080 inch thick. Mounting hardware and clips are separate items, so add fasteners for each bearing point to your order.

The 7 inch width is narrow for a finished stair tread on its own, since most commercial treads run wider. Planks are cut and set side by side to make up the tread depth, or used single-width for crossovers and equipment access runs. The three diamond non-slip surface is the same either way.