How to Build a Riser for Arena Seats

Risers for indoor or outdoor seating in arenas allow spectators to catch their favorite sporting events. The tiered risers are constructed from EPS geofoam cemented in place in a stepped appearance. Once the risers are in place, construction workers attach the metal hardware to secure the rows of seating. Arena risers require a crew of workers with experience in working with concrete applications.

EPS geofoam blocks
Circular saw
3/4-inch plywood
Foam adhesive
Threaded fasteners
Ties
Adjustable wrench
Riser hardware
3/4-inch HDO plywood
Concrete
2-inch by 4-inch wooden board

Instructions

- 1
  Place EPS geofoam on a compacted base in horizontal rows that are tiered back. Cut the 3/4-inch plywood into foot-long pieces with the circular saw. Apply foam adhesive to the plywood and attach over the seams of the geofoam blocks.
- 2
  Secure threaded fasteners through metal ties 24 inches on center along the blocks to hold the plywood to create the concrete riser. Screw in the fasteners with the adjustable wrench.
- 3
  Attach the HDO plywood to the metal ties so the flat of the wood faces outward. Secure the plywood with the pre-assembled riser hardware by tightening the anchor bolts into the plywood.
- 4
  Pour the concrete onto the geofoam blocks either by carrying buckets onto the form or pumping the concrete over the foam with a hose connected to a concrete truck. Smooth the surface with the 2-inch by 4-inch wooden board.
- 5
  Allow the concrete to set. Remove the plywood riser face. Attach the seat hardware to the concrete. Secure the arena seats to the seat hardware.

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