What does a truss bridge look like?

A truss bridge is a bridge design that uses trusses, which are triangulated structural frames. Trusses are typically made of steel or wood and are used in a variety of bridge designs, including:

- Simple truss bridge: This is the most common type of truss bridge and consists of a single truss that supports the bridge deck.

- Vierendeel truss bridge: This type of truss bridge is similar to a simple truss bridge, but the trusses are made up of vertical members instead of diagonal members.

- Warren truss bridge: This type of truss bridge has a distinctive "W" shape and is often used for long-span bridges.

- Pratt truss bridge: This type of truss bridge has a distinctive "X" shape and is also often used for long-span bridges.

- K truss bridge: This type of truss bridge is a combination of a Warren truss and a Pratt truss and is often used for heavy-duty bridges.

Truss bridges are often used for long-span bridges because they are lightweight and strong. They are also relatively easy to build and can be made from a variety of materials. However, truss bridges can be more expensive to build than other types of bridges and can be more susceptible to damage from wind and earthquakes.