Concept explainers
Why is the cross section of a metal beam I-shaped and not rectangular?
To Explain: The cross section of metal beam is I-shaped and not rectangular.
Explanation of Solution
Introduction:
In rectangular beam, more steel material is used which increases the weight of the beam. To reduce the weight of the beam, it is I-shaped.
The beam’s material is scooped from the middle. Least material is put at middle so that beam becomes I-shaped. I-shaped beam becomes light in weight but carries the same strength as that of a rectangular beam.
Conclusion:
I-shaped beams are light in weight and carry the same strength of the rectangular beam.
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