Question

why one end of a steel girder in a bridge kept on rollers insed of fixing it in pillar​

Answer 1

Explanation:

One end of the girders is fixed into the concrete or brick pillars and its other end is not fixed , but is placed on rollers. The reason is that if there us any rise ( or fall ) in temperature of the atmosphere, the girder can freely expand ( or contract) without affecting the pillars.

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