Tekla Structural Designer is described as 'Analyze and design buildings efficiently Tekla Structural Designer is revolutionary software that gives engineers the power to analyze and design buildings efficiently and profitably. Fully automated and packed with many unique features for optimized concrete and steel design' and is an app. There are more than 25 alternatives to Tekla Structural Designer for Windows, Web-based, Mac and Linux. The best Tekla Structural Designer alternative is CalcSteel, which is free. Other great apps like Tekla Structural Designer are Robot Structural Analysis Professional, SAP2000, RISA-3D and SkyCiv Structural 3D.