YapiData has two firm1-YapiData Engineering - Design2- YapiData Evrensel Endustrialed Structural Systems Ltd.- percast structural prestressed elements same as Prefabricationa- prestressed EPS void concrete ortotrop structural precast panel system for floor,bridge e.c.tb- prestressed EPS void concrete ortotrop structural wall precast panel for building structural panel elementsc- prestressed concrete foundation precast structural special elements and post tensioning foundations