The documentation can be found here.

Our (mock) client is the American Bridge Company and we (Pranae Harirajan, Apollo Heo, Ria Khatri, Sathvika Nadipalli) have been tasked to design a bridge across Trinity River for vehicles to cross. The specific conditions were to use Bridge Designer, and meet all WPB Designer Constraints. Our goal was to make the least costly design, with little regard to stability.