A beam or "girder" bridge is the simplest and most inexpensive kind of bridge. According to Craig Finley of Finley/McNary Engineering, "they're basically the vanillas of the bridge world." ...

Make a model suspension bridge to see how it works. After you test the strength of the beam bridge in Step 4, predict how many pennies your suspension bridge will support. 1. Cut two short pieces ...

This project consists of replacing the existing 4-span steel I-beam bridge on Route 74 with a 3-span concrete bulb-tee beam bridge and preserving the existing 4-span prestressed concrete spread ...