Test Academy | Railway lines and girders for buildings, are I shaped, because The bending of a girder is inversely proportional to depth, hence high girder bends less, The coefficient of rigidity increases by this shape, Less volume strain is caused, This keeps the surface smooth

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Railway lines and girders for buildings, are I shaped, because

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The bending of a girder is inversely proportional to depth, hence high girder bends less
The coefficient of rigidity increases by this shape
Less volume strain is caused
This keeps the surface smooth

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