now or never

For my project I decided to do bridges and to see what one would hold the most weight. So I did. I choose two types of bridges and I tested them out and I found out that the triangular bridge held the most weight. The half circle bridge held a little less then half of what the triangular bridge did. I had to build each kind of bridge then test them each at a different time. I found out in real life that the bridge would still be stronger too.

In real life bridges are not made of tooth picks, they use metal. They actually use different kinds of metals. The best on for them to use is iron or steal because they don't rust as fast ...