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## What is the science behind building a bridge?

They do it by carefully balancing two main kinds of forces called compression (a pushing or squeezing force, acting inward) and tension (a pulling or stretching force, acting outward), channeling the load (the total weight of the bridge and the things it carries) onto abutments (the supports at either side) and piers ( …

### What bridge designs are the strongest for science projects?

Truss bridges are extremely effective because they have a high strength to weight ratio. In this experiment we have tested which type of truss bridge is the strongest, yet uses the least amount of material. Two of the most used truss bridges are of the Pratt and Howe design.

How do you build a strong bridge structure?

While connecting two sides, make triangles. If you really have time and want your bridge to be very strong, you may also divide each triangle to 3 smaller triangles. This will give additional strength to your bridge. You may also glue additional strips of pasta over the roadway.

What is the strongest type of bridge?

truss bridge
Which type of bridge is strongest? Even though the truss bridge design has been around for literally centuries it is widely regarded as the strongest type of bridge.

## Why does a bridge not fall down?

Water bridges were discovered 120 years ago, but no one has ever been sure why they do not collapse. One theory is that the voltage makes the water molecules line up, creating a “dielectric” tension that stops the bridge from falling. Now, researchers believe that water bridges rely on both strategies.

### What is the weakest bridge?

beam bridges
We did further research after our experiment and learned that beam bridges are actually the weakest of all bridges and suspension bridges are the strongest.

Which type of bridge is the strongest?

An arch bridge is stronger than a beam bridge, simply because the beam has a weak point in the center where there is no vertical support while arches press the weight outward toward the support.

What is the strongest bridge in the world?

Firth of Forth Bridge Notably one of the strongest bridges in the world, the Firth of Forth had to be strong since its primary function was for railroad loading. Today, this Highlands workhorse still supports between 150 and 180 trains each day taking people from Glasgow to Edinburgh and all stops in-between.

## Which type of bridge can hold the most weight?

arch bridge
The arch bridge can hold the most weight of the three, the deck truss bridge can hold an average amount of weight, and the beam bridge could hold the least amount of weight.

### What is the cheapest bridge to build?

beam bridge
The simplicity of the beam bridge made it the first type of bridge ever built. It’s still the cheapest to build. All you need is a crossbeam covering the span, supported by an abutment at each end. One type of beam bridge is a girder bridge, which employs steel girders as reinforcement.

Why is bridge building good for science project?

Through hands-on experimentation the concepts of physics inherent in bridge building become clear. This experience gives students a better understanding of a human-made structure that they encounter in cities and towns on a regular basis.

Who is responsible for the science fair project?

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