A suspension bridge's cables are beautiful to look at, but they also enable the bridge to cross large spans. Make a model suspension bridge to see how it works. After you test the strength of the beam ...

At first glance, an I-beam looks flimsy compared to a solid chunk of steel — but its geometry is what makes it powerful. Most of the strength in a beam comes from how far the material is placed from ...

The Interstate 35 bridge that collapsed in Minneapolis was a truss bridge, one of six main bridge types. Here's a quick look at the different types: A truss bridge is a bridge composed of connected ...

City officials are asking for your help to choose a new design for the Grand Avenue Bridge over the Des Moines River in downtown.View video of this storyThere are four designs ranging from a plain ...