Safety Grating planks shall be manufactured from one-piece material with serrated edges on top of diamond shaped openings.
Safety grating planks shall have integral side channels and be manufactured from:

Pre-galvanized steel - Z275 (G90)

Stainless Steel Type 304 or 316
Materials:

Steel - 14 Gauge or 12 Gauge
Z275 galvanized (H.R.P.O. or hot dipped
galvanized by special order)

Aluminum - 0.080" thickness from 4 3/4" to 11 3/4",
18 3/4" .100" thickness, alloy 5052 H32

Stainless Steel - Type 304 or 316