1. Warren truss by: Chris bell 11/16/16

2. OVERVEIW How does it work What is it made out of What is it used for
advantages/disadvantages
Who invented the warren truss bridge
How did it get it’s name
pictures

3. James Warren (1806–1908) was a British engineer who, around 1848 to (along with Willoughby Manzoni), patented the Warren-style truss bridge and girder design. This bridge design is mainly constructed by equilateral triangles which can carry both tension and compression.

4. The bridge is built with cast iron side bands, rods, or plates, inclined towards each other, and combined so as to form a series of Vandyke's [V shapes]. They are bolted at top to horizontal compression rods, and at bottom to horizontal tension rods, and carry a roadway at top or at bottom, or at both.

5. The Warren Truss uses equilateral triangles to spread out the loads on the bridge The equilateral triangles minimize the forces to only compression and tension. Interestingly, as a load (such as a car or train) moves across the bridge sometimes the forces for a member switch from compression to tension.

6. Advantages: First and foremost the design has an interior railing which is connected to the diagonal span which prevents people from falling down from the edge of a bridge
Disadvantage:  They are built with small and light members, so they can be built in places with difficult access or limited transportation services. Also, given that all members are in compression or tension (this is, no bending / no shear), they have a good dynamic behavior (for example, in railways).

8. resources www.structuremag.org/?p=8715
thenextgalaxy.com/advantages-and-disadvantages-of-truss-bridges/