Why is one end of a steel girder in a bridge kept on rollers instead of fixing it in pillar? - Physics

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Why is one end of a steel girder in a bridge kept on rollers instead of fixing it in pillar?

Solution

In summer when the temperature increases considerably the bridge made of metal expands and rollers slide to allow for expansion otherwise the bridge may break the pillar.

Concept: Thermal Expansion - Superficial Expansion

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Chapter 6: Heat Transfer - Short/long Answer Questions [Page 121]

Q 25 Q 24.5 Q 26

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Selina Concise Physics Class 8 ICSE

Chapter 6 Heat Transfer
Short/long Answer Questions | Q 25 | Page 121

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Why is one end of a steel girder in a bridge kept on rollers instead of fixing it in pillar? - Physics

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