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RECo’s arch product, TechSpan®, exhibits this efficiency in design and construction. Using reinforced precast concrete and a catalog of proven optimized shapes, RECo’s engineers design and manufacture the arch units based on the project’s loading and clearance requirements. With accompanying retaining walls, the result is substantial load-carrying ability with minimal materials that provide efficient high-performance bridges, tunnels and other proven solutions for applications in roadways, railway, mining, military, and beyond.TechSpan is ideal for short to medium span bridges and tunnels.