Patent ID: 8869461

Claim:
A stadium seating construction system, comprising: a tiered stadium seating support understructure; a plurality of tiered pre-cast concrete treads mounted to the stadium seating support understructure, at least one of said treads having a) a pre-cast concrete body portion, b) a pre-cast concrete lip portion integrally formed with and extending upwardly from a rear end of the concrete body portion, and c) a non-concrete front embed embedded within a front end of the concrete body portion; and a plurality of tiered non-concrete risers, at least one of said risers arranged such that a lower portion of the riser overlaps the forward side of the upwardly extending pre-cast concrete lip portion of a lower adjacent tread of the at least one of said treads and receives therethrough a fastener attaching the riser to the upwardly extending pre-cast concrete lip portion.