The girders having two or more than two webs are called -
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A.
Plate girder
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B.
Box girder
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C.
Gantry girder
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D.
Balanced girder
Correct Answer:
B. Box girder
Explanation:
A box girder is the correct answer because it is specifically designed with a closed, hollow cross-section consisting of two or more vertical webs connected by top and bottom flanges. This multi-web configuration provides superior torsional stiffness and strength compared to other types. - Plate Girder: Typically consists of a single vertical web plate welded to horizontal flanges.
- Box Girder: Features a rectangular or trapezoidal shape formed by at least two webs, making it ideal for long spans and heavy loads.
- Gantry Girder: A functional classification for girders supporting overhead cranes, which may use various web configurations but are not defined by having multiple webs.
- Balanced Girder: Refers to the structural equilibrium or support method of a beam rather than its specific cross-sectional web count.
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