Bridge project By Nick toland, christian gildea and vincent horton

Truss system

We used a truss system to help relocate the tension on the bridge. A truss is basically two beams or pole s that cross each other taking the tension and moving it somewhere else, these can be used many different shapes and ways, we used these as X's.

Base of our bridge

The base of our bridge is very strong. It is built of a dsign we put a lot of thought into. The bottom will have units of 5 popsical sticks then connected by one horizontal stick. This way we can make 6 of those and connect them cogether with stocks sticking out to add on our sides.

Sides of our bridge

The sides of our bridge is made up of the trusses, and the beams. The beams basically connect the top of the bridge to the actully bridge base. The sticks that stick out through the base, the sides can stick through the sides providing the sides to stay up and hold all the tension.

The test

Our first bridge design really gave us high expectations and a lot of ideas and creativity to work with. Due to the fact that none of us had any experience with popsicle bridges, we had very broad ideas.such as a bridge that was flat or a bridge that was tall and other ideas. We came with a "weird" idea according to our classmates. Our idea was to have a truss system in the middle of our bridge with post/beams on the sides. The thought by doing this it will redirect the tension somewhere else to even out the forces interacting with our bridge. On test day let's just say we gave a pretty good laugh for the class because of the fact our bridge was barely long enough to reach the tables it couldn't hold the platform. We adjusted the table to be smaller and our bridge was holding up good till 65 pounds later and the sides took a spill.

SECOND BRIDGE

Triangle system

Our second bridge we used a triangle system to make our beidge strong. A triangle made out of popsical sticks sideways is very weak were as a vertical triangles are very hard to break. We used five triangles on both sides connected by sideways sticks to keep the bridge up and strong.

Base

The base of our second bridge, was made up of popsical sticks, where five go next to each other then are connected by a sideways stick. Five more sticks are put on top of the layered base as well. These sideways sticks are used as the platforms for the sides to connect to where the the base has to break before the sides.

Horizontal beams

The main part of our design was under part with sideways interlocked popsical sticks. These are very strong and hard to break. By having this underneath our bridge, it will keep the bridge strong and sturdy. With this beam under the bridge. The top of our bridge will be compressed together and the beam will limit this. The day before testing this part was named illegal and we were unable to use the strongest part of our bridge.

The bottom of our bridge will take lots of tension and expand, this would have been handled better if our support beam would have helped it stay up

After testing our first design, we had some good ideas and points on what we should do to help maximize the weight held by the bridge. We decided that by having the sticks side ways they are much harder to break. We were going to make a platform for under our bridge to make it hard to break. We took a hard lost after our teacher told us that that peiece we built was illegal and our whole design was falling apart. Our bridge was put up to the test and snapped immediately after putting the platform on.

The test

When we put our bridge onto the tables and our teacher put the platform onto our bridge and it slowly snapped into two pieces. We knew it wasn't going to go far because we lost a key part of our bridge.

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