1. BRIDGE PROJECT
Hunter fuller
Period 5

2. Types of Bridges 1. beam bridge 2.truss bridge 3.arch bridge
A horizontal beam that is supported by piers on each end. The farther apart the piers are, the weaker the beam will be. Usually will not be longer than 250 feet
2.truss bridge
A triangle assembly , usually made of straight steel bars. Arms of steel will extend from one pier to the other. Steel tubes will hold these arms in place. The cantilever arms will support a third central span of the bridge.
3.arch bridge
Very natural and great strength, and was built by romans, who built the arches out of stone. Today is mostly steel and concrete. Can span up to 800 feet.
4.suspension bridge
Have a truss system under the roadway to resist bending or twisting. Can span 2,000 to 7,000 feet-biggest types of bridges. Golden Gate is example.

3. Beam Bridge
These are the smallest and simplest bridges. This bridge is one beam supported by two piers on each side. The farther away the piers are, the weaker the bridge is. This is why most will not be longer than 250 feet.

4. Truss Bridge
A truss is a bridge supported by steel triangular figures on the top or bottom. Steel arms will span from one pier to the other, and will be supported by diagonal steel tubes which create the triangle shapes.

5. Arch Bridge
An ancient style bridge that was built by the romans. This consists of arches, supporting more arches, then connecting two piers. It can either consist of many or just one giant arch. Romans used stones, but todays are made of concrete and steel.

6. Suspension Bridge
Suspension bridges are the ones that can be built the biggest out of the four. Suspension bridges can range from 2,000 to 7,000 feet long. This bridge is created with a truss system under the roadway to resist bend, and make it stronger. It also has steel suspension cord to help spread the tension and force created.

7. Forces Bridges Must Withstand
Compression-squeezing force that brings a material closer together, tends to become shorter in this state.
Tension-Force that will stretch a material apart, and will make the material longer
Bending- Will curve material, making one side create tension, while the opposite side will create compression.
Shear