How Do Engineers Build Safe Bridges? | Built From Disaster

In order for something new to be born, something else has to go down to ashes. That is a life motto, but also reality for some engineering marvels.
This documentary takes a look at how bridge disasters have helped engineers build better bridges. Some catastrophic collapses have shaped future designs. And now, the world is a safer and better place.
Civil engineers plan, design, construct, and maintain structures including bridges. To develop a safe structure, they have to follow the basis of the engineering design process.
Those include the following steps: developing a complete understanding of the problem, determining potential bridge loads, combining these loads to determine the highest potential load, and computing mathematical relationships to determine the structure of the bridge.