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Demolishing Bridges

CSEF · 2006 Structural Capability & Strength of Materials (Junior Division Only)

Omar Espinoza · Clay Elementary School, Kingsburg

Overview

Objectives/Goals The objective is to see whether the Pratt truss will hold more weight then the Warren design. Methods/Materials I used 3/16 wooden dowels, cut them into lengths of 2 inches, 27/8 inches and 4inches. I also used Elmer's carpenter's wood glue and used pliers to cut the wood. Once i was done I had a three dimensional bridge with two sides braced together. Results My results were simple. I only did one test. The Pratt design held 65 pounds, the Warren design held 33 pounds. Conclusions/Discussion I studied two types of bridges, the Warren design and the Pratt design. I built both of them to see how much weight they could hold. I put the weight on the middle of the trusses.The Pratt design held more weight than the Warren design.

Summary statement

I tested the Pratt and the Warren design trusses to see which would hold the most weight.

Help received

Santigo Espinoza Jr.

Competition history

  • CSEF 2006 Structural Capability & Strength of Materials (Junior Division Only) · Entry J1809

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