NCSPA Design Data Sheets are prepared by the NCSPA Technical Advisory Committee to provide up-to-date technical inforamtion about CSP products and their proper use and application. Design Data Sheet #12 – Typical Headwall Designs Design Data Sheet #16 – Rehabilitation Methods Design Data Sheet #18 – Pipe Reinforcement at Fittings and Intersections Design Data Sheet #19 – Load Rating and Structural Evaluation of In-Service, Corrugated Steel Structures Design Data Sheet #20 – Design of CSP Manhole Risers