Question:
WHY GIRDERS OF SUPPORTING ROOFS FORMED IN SHAPE OF I
Answer:
A girder is a support beam used in construction. Girders resist external loads primarily due to their ability to bend.
When a structure is subjected to compressive stress, buckling may occur. Buckling is characterized by a sudden sideways deflection of a structural member as in the given diagram.
The I shaped cross-section provides the necessary support to prevent bucking.
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