Torsion Constant for Square Cross-section Formula |
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\( J \;=\; 2.25 \cdot a^4 \) (Torsion Constant for Square Cross-section) \( a \;=\; \sqrt[4]{ \dfrac{ J }{ 2.25 } }\) |
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| Symbol | English | Metric |
| \( J \) (Greek symbol alpha) = torsion constant | \(in^4\) | \(mm^4\) |
| \( a \) = half the edge length of a square | \(in\) | \(mm\) |
