Introduce el texto aquí

Introduce el texto aquí

1. Choosing the type of bridge

   • What the bridge needs to cross?
   • The beam bridge
     • It's horizontzl surface with supports at either end.
     • Short spans of distance.
   • The arch bridge
     • It's from the ancient Greek
     • It's used in places where it's difficult to add extra supports.
     • It's supported by structures known as abutments
   • The suspension bridge
     • It's more modern.
     • Today they use strong steel cables.
     • They are lightweight and strong
     • Can be use for long distances

2. They are use for go under something like a montain

   • It's building to carry water, dispose of waste and protect cables.

3. Tunnels are long, narrow passages or people, cars,etc.