Rectangle section properties
About the axis parallel to the breadth.
Method
I = bd³/12, Z = bd²/6. Worked case: 100 mm by 200 mm gives I = 66,666,667 mm⁴ and Z = 666,667 mm³.
Logic: how this figure is built.
Last checked 2 October 2026. See the common-calculations note and the disclaimer.