B-Line Eaton series Grip Strut ten diamond plank, 144" Grating length, 24" Grating width, Steel, 3" Channel size, Mill-galvanized, Grip Strut, 12 gaug

OSHA compliant, per the manufacturer spec on the 103012 12 GL plank. The non-slip diamond-pierced surface is what earns it: the ten diamond pattern gives footing where grease, water, or ice would make smooth plate dangerous. That is the reason this gets specified over checker plate on mechanical mezzanines, rooftop equipment access, and transformer platforms.

Mill-galvanized is the finish here, meaning the steel was galvanized in coil before the plank was formed and pierced. That leaves the cut edges and the pierced diamond openings as bare steel. It holds up fine in covered and normal indoor industrial service, and it is commonly used on sheltered exterior platforms, but in a washdown bay, a coastal site, or anywhere with chemical exposure you want a hot-dip-after-fabrication or stainless plank instead, where the coating wraps every cut edge.

12 gauge is the heaviest common material thickness in formed Grip Strut, and it is the one specified for longer clear spans and heavier foot and equipment loading. Lighter gauges of the same 3 inch channel profile exist for shorter spans and lighter service. If your supports are close together and you are only carrying pedestrian traffic, a lighter gauge does the job; if you are spanning further or rolling carts across it, stay at 12 gauge.

The 103012 12 GL is the plank itself, steel, formed with a 3 inch channel on the sides. Hold-down clips, saddle clips, or bolts to secure it to your supporting steel or strut framing are separate items, sized to the 3 inch channel depth. Plan the attachment hardware into the same order so the crew is not on site with deck and nothing to fix it down with.

Grip Strut plank is a single formed steel sheet with pierced diamond openings and a channel turned down on each side, so it arrives as a finished walking surface with its own structural depth, 3 inches here. Bar grating is a welded assembly of bearing bars and needs its own banding and support layout. Plank goes down faster on retrofits and mezzanine decks, and the pierced diamonds shed water and debris while still giving a much smaller open area than grating, which matters when you do not want tools dropping to the level below.

Order it as Eaton B-Line part 103012 12 GL. That number carries the whole configuration: ten diamond plank, 144 inch grating length, 24 inch grating width, 3 inch channel, 12 gauge steel, mill-galvanized. Changing width, gauge, or finish changes the part number, so match it exactly against the schedule if a spec drawing calls the deck out.

Yes, steel plank is regularly cut on site to fit a run, and the 144 inch length gives you room to trim back to a support. Two things follow from cutting mill-galvanized material: the cut end is bare steel and should get a cold-galvanizing touch-up, and you have to land the cut end on a support member rather than leaving it cantilevered. Cutting within the channel depth of 3 inches on the sides also means the trimmed end loses part of its stiffening flange, so keep it bearing.