B-Line MG62518FM 20 Eaton series Grate-Lock traction grip female to male interlock, 240" Grating length, 6" Grating width, Carbon steel, 2.5" Channel size, Mill-galvanized, Traction grip, Female/Male, 18 gauge

It's a 20-foot plank: 240 inches long, 6 inches wide, with a 2.5 inch channel height. That 6 inch width is what you multiply out to cover a walkway, so a 3-foot-wide catwalk takes six planks locked side by side.

The MG62518FM 20 is a female-to-male interlock plank: one edge is formed female, the opposite edge male, so each plank snaps into the next without fasteners between planks. Because both edge types are on the same piece, you can run a continuous field of them in one direction. Planks with two female or two male edges are what you use to close out an edge.

Yes. The plank is a traction grip surface, made for safe, sturdy footing where non-slip is required, which is why it gets used on mezzanines, catwalks, platforms and stair treads rather than plain sheet.

The plank is 18 gauge carbon steel with a mill-galvanized finish. Mill galvanizing gives you coating on the flat stock, but the sheared and formed edges are bare after fabrication, so treat it as suitable for dry interior and sheltered work. For continuous weather exposure, washdown, or corrosive process areas, specify a hot-dip galvanized or stainless plank instead.

2.5 inches is the depth of the formed channel, and it is also the plank's overall height, so you lose 2-1/2 inches of headroom or add 2-1/2 inches to your finished walking level over the supporting steel. Deeper channel means more section for span; span capacity itself is a load question for the manufacturer's load table, not something the plank's dimensions settle on their own.

No hold-down hardware is part of the plank. What you get is the 240 inch female/male interlock plank itself; the interlock joins plank to plank, but anchoring the run to your beams or bearing bars needs separate saddle clips or self-drilling fasteners ordered alongside.

Yes, carbon steel plank at 18 gauge cuts with a chop saw or shears on site, which is how you fit a 240 inch plank to a shorter bay. Field-cut ends lose the mill galvanizing, so touch them up with a cold galvanizing compound if the area sees any moisture.

Certification documentation for the MG62518FM 20 comes from Eaton directly, so submittal and rating paperwork should be requested from the manufacturer for the Grate-Lock series.