Structural
Beam Deflection Calculator
Calculate the maximum deflection of a simply supported beam under a central concentrated load.
These calculators provide estimates and educational results. Always verify critical engineering calculations against applicable standards and qualified professional review.
Formula
δ = PL³ / (48EI)
Maximum deflection at midspan for a simply supported beam with a point load at center.
Variables
| Symbol | Variable | Unit | Description |
|---|---|---|---|
| δ | Deflection | m | Maximum deflection at midspan |
| P | Load | N | Point load at center |
| L | Span | m | Beam span length |
| E | Elastic Modulus | Pa | Modulus of elasticity of material |
| I | Moment of Inertia | m⁴ | Second moment of area of cross-section |
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