Particle Board Decking is for use on Single and Double Rivet units and is Industrial Grade 1-M-2.;EZ-Deck is 22 ga. galvanized formed steel. Multiple planks are used to achieve unit depth. FeatherDeck™ is made from a proprietary compound and is lightweight, strong, water proof and chemical resistant. EZ-Deck and FeatherDeck™ decking are for use on Double Rivet units ONLY, must be center supported for widths greater than 42". FOB Shipping Point.