How Bridges Stay Standing

Description:
Bridges combine engineering, geometry, materials, and careful planning to carry loads across gaps.

Different designs for different problems

Beam bridges are relatively simple structures, while arch bridges transfer forces through curved structures. Suspension bridges use large cables to support long spans.

Engineers consider many factors when designing a bridge, including weight, wind, temperature, vibration, materials, and the surrounding environment.

Bridge type	Characteristic
Beam	Simple horizontal structure
Arch	Uses curved structural elements
Suspension	Uses large supporting cables
Cable-stayed	Roadway supported by cables connected to towers