Plastic Section Modulus of a Hollow Circle formula |
||
| \( Z \;=\; \dfrac{ 4 \cdot ( R^3 - r^3 ) }{ 3 } \) | ||
| Symbol | English | Metric |
| \( Z \) = plastic section modulus | \( in^3 \) | \(mm^3 \) |
| \( r \) = inside radius | \( in \) | \( mm \) |
| \( R \) = outside radius | \( in \) | \( mm \) |
