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    4. Steel: Amongst bridge materials steel has the highest and most favorable strength qualities, and it is therefore suitable for the most daring bridges with the longest spans.

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  17. How it Works: Engineering Bridges to Handle Stress

  18. High-Strength Low-Alloy Steels

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  20. Bridges - Unit - TeachEngineering

    Students are presented with a brief history of bridges as they learn about the three main bridge types: beam, arch and suspension. They are introduced to two natural forces tension and compression common to all bridges and structures.

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