Wind Vs. Trusses.

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Presentation transcript:

Wind Vs. Trusses

News - testing tornado winds http://www.youtube.com/watch?v=ga7N-bS4nLU News - testing tornado winds Reinforcing tornado houses http://www.youtube.com/watch?v=o-PMi23aQ3k g

Trusses A framework, typically consisting of rafters, posts, and struts, supporting a roof, bridge, or other structure

What we DON'T want!

Experiment #1 - Manillatag and Fasteners Square Test Square & Truss Experiment Pentagon House & Truss experiment Before After

Paper strips and Trusses What did we learn from these experiments? Paper strips and Trusses Trusses helped to make squares and pentagons stronger.

The cube bent after ____ pennies were put on top of it. #2 Cube Test WHAT HAPPENED The cube bent after ____ pennies were put on top of it.

trick to building a cube: #3 Cube and Trusses Test DRAWING WHAT HAPPENED trick to building a cube: I had ____ trusses on my cube. It broke after _____ pennies. Once you have finished the experiment and filling out the worksheet, raise your hand. If the teacher gives it the OK, you can come get more "Truss" pieces and continue testing out your square to see how many pennies you can make it hold by adding more trusses! (and write it on the back of your paper) "Most Pennies" Score!

The Trusses in a cube should make it even stronger!