Combine National Public Seating’s Pie-Shaped Riser Unit w/ Carpet Deck to create custom arrangements with your straight choral risers. The built-in couplings allow you to safely and easily connect risers into curved formations. A sturdy 16-gauge steel frame supports the solid plywood core decks, so they’ll stand up to years of heavy use. This model features attractive carpeted decks for a finished look. Choose from four carpet colors to match your venue.