EngiRef / Mechanical Engineering Formula
Moment of Inertia (Rectangle)
Moment of Inertia (Rectangle): Second moment of area for a rectangular cross-section about centroidal axis. A Statics formula in mechanical engineering.
Statics
Specification
- Name
- Moment of Inertia (Rectangle)
- Discipline
- mechanical
- Category
- Statics
- LaTeX
- I = \frac{bh^3}{12}
- Description
- Second moment of area for a rectangular cross-section about centroidal axis
- Conditions
- About the centroidal axis parallel to the base (width b)
- Can solve for
- I, b, h
- Tags
- moment, inertia, rectangle, section
Variables
| Symbol | Name | Unit | Si Unit | Imperial Unit |
|---|---|---|---|---|
| I | Moment of Inertia | m⁴ | m⁴ | in⁴ |
| b | Width | m | m | in |
| h | Height | m | m | in |
Common questions
- What is the Moment of Inertia (Rectangle) formula?
- Second moment of area for a rectangular cross-section about centroidal axis. It sits under Statics, Mechanical engineering in the EngiRef reference.
- What do the symbols in the Moment of Inertia (Rectangle) formula mean?
- In Moment of Inertia (Rectangle), I is moment of inertia in m⁴; b is width in m; h is height in m.
- When does the Moment of Inertia (Rectangle) formula apply?
- Moment of Inertia (Rectangle) holds under this condition: About the centroidal axis parallel to the base (width b).