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SECME – Balsa Bridges

SECME – Balsa Bridges. Presented By: Michael Olka P.E. What are the teams responsible for building?. The superstructure only. The support is supplied at the testing site. Balsa Size Restrictions. Maximum Member cross section is ¼” by ¼”.

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SECME – Balsa Bridges

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  1. SECME – Balsa Bridges Presented By: Michael Olka P.E.

  2. What are the teams responsible for building? • The superstructure only • The support is supplied at the testing site

  3. Balsa Size Restrictions • Maximum Member cross section is ¼” by ¼”. • Students are allowed to laminate smaller members to create larger ones, however this “built-up” section may not exceed ¼” by ¼”. ¼” ¼” ¼” ¼”

  4. The Supplied Support 38 cm 10 cm 6 cm

  5. Testing Machine Leave the center open

  6. Ranking of Bridges • The Bridges are ranked according to the Strength to Weight Ratio. Not the Maximum Load. Load Ratio Weight *The higher the ratio the more efficient the bridge.*

  7. Example of the Ratio Bridge A: Weight: 100g Load: 45,359g (100lbs) Bridge B: Weight: 50g Load: 27,215g (60lbs) SWR: 544.31 SWR: 453.59 Bridge B wins!

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