Keystone library 2nd floor

In class today, we put a floor on the 2nd story in our library. We could either use precast slabs or cast-in place for our floors.

I liked this activity because it was quick and wasn't hard to do. I chose the precast because it is cheaper, faster, and easier, unlike cast-in-place, which takes time, and time=money.

Structural efficiency activity

Today in class, we made an 8 inch tall structure out of playing cards of tape that was required to hold at least 5 lbs.

 

       Image of your structure

 

We were in second place for the weight, which was 7861 g. Our structural efficiency rating was 225.69, which was about average. In our preliminary tests, we just made sure it held about 2200 g. which is about five lbs. We didnt revise our design.To improve structural efficiency, we could have made the cards half circles for more support and used less tape for less mass.       

Keystone library Roof

Today we made a greenroof on the 2nd floor. we also put a roof above the other half of the building. We had to put specific layers in the green roof, like grass, and dirt.

It was fun because the requirements were pretty loose, we could choose the thickness of some of the materials and design the upper roof.