I did a very similar project for my Foundations of Engineering class (easiest class i'll ever take ).

I used a program called west point bridge designer. It was made for a contest but your entry was optional. I'm not much of a civil engineer, but search for the program and see if it helps you any more. It has a load test and three or four different metal to use in several different sizes. Thats all I can help you with. Good luck.


My ride(Cardomain link) : '95 Contour 16V Zetec DOHC, Teal , ATX Born on Sep. 4, 1995 86+ miles *LEDs mods are on their way!*