The program will load-test your structure in a progressive dynamic way, showing deflected shapes and allowing you to track its progressive collapse. You can view the member loadings and numeric deflection values at any point in the simulation. The efficiency of your design configuration will be determined by calculating how much weight of material would be required to carry the specified loads."
With a strong underlying physics model, Structural Engineering Challenge is ideal for engineering students or Bridge Builder/Pontifex fans who want to try a more realistic simulation of bridges. The learning curve is somewhat steep, but fortunately the documentation and tutorial are both very well-written. With the ability to create new challenges on your own and new ones being posted regularly at the official site, Structural Engineering Challenge is a strong simulation with considerable long-term play value. Well worth the small registration price tag of $12. Highly recommended!