Heat makes things grow. See exactly how much a beam, rail, or pipe lengthens with temperature — and why engineers leave gaps for it.
Thermal ExpansionLive
materials grow with heat
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Heat a material and it expands: ΔL = α·L·ΔT, where α is the coefficient of linear expansion. Area grows at twice that rate and volume at three times. It is why bridges have expansion joints, why rails buckle in heat, and why Invar — with almost zero expansion — is prized for precision instruments.
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How it works
Thermal expansion follows ΔL = α·L·ΔT, where α is the coefficient of linear expansion. Area expands at twice that rate and volume at three times. This is why bridges have expansion joints and rails can buckle in heat, and why low-expansion alloys like Invar are used in precision instruments and measurement standards.
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