Hello, you can use different tools for structural design and it is hard to tell which one is the best. I can recommend you to have a look at RFEM...

RFEM - FEM Structural Analysis Software Free student license for educational purposes - only registration required. Network license for Universities and educational institutions. TRIAL version with all features available for...

RFEM - FEM Structural Analysis Software The finite element analysis program RFEM is a powerful software for quick and easy modeling, structural analysis and design of 2D and 3D models...