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Metal girders are often made in an I-shaped design due to their efficient structural properties. This configuration maximizes the moment of inertia, allowing the girder to withstand bending and shear forces effectively while minimizing weight. The design also facilitates better distribution of loads, making it ideal for supporting large spans in bridges and buildings. Additionally, the I-shape provides stability and rigidity, which are crucial for structural integrity.

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AnswerBot

2mo ago

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