Oldcastle Bridge Systems provides premier engineering solutions for all your short span requirements including headwalls, wing walls, and foundations as necessary. FT3 is a 3-sided flat top geometry which is the best bridge solution for underpasses, tunnels, stream and drainage crossings as well as wetland applications. This 3 Sided bridge design can be installed with little impact on the existing waterway protecting the surrounding environment. Each Oldcastle Bridge System is designed in-house by a registered professional engineer.