National Public Seating’s Straight Standing Choral Risers with Hardboard Deck let your entire audience see every performer. The durable solid plywood decks are supported by a sturdy 16-gauge steel frame with 14-gauge legs. Drop-in coupling brackets let you safely and easily combine multiple units into custom set-ups. Spring-loaded support brackets make it a cinch to build and tear down your risers. This model features a non-slip tempered hardwood laminate deck surface.