Beam Deflection Calculator
Calculate deflection, bending moment, and shear force for structural beams
Beam Configuration
Define your beam parameters
Save Calculation
Calculation Results
Deflection Formula
Where: P = Load, L = Length, E = Elastic Modulus, I = Moment of Inertia
Deflection Check
Deflection limit (L/360): 13.89 mm
Actual deflection: 130.21 mm
Status: Excessive
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Understanding Beam Deflection
What is Beam Deflection?
Beam deflection is the vertical displacement of a point on the beam from its original position under load. It's critical in structural design to ensure serviceability.
Beam Types
- Simply Supported: Supported at both ends, free to rotate
- Cantilever: Fixed at one end, free at the other
- Fixed-Fixed: Both ends fixed, no rotation allowed
Loading Conditions
- Point Load: Concentrated force at a specific location
- UDL: Uniformly Distributed Load across the beam length
Deflection Limits
Common deflection limits: L/360 for floors, L/240 for roofs, L/180 for cantilevers. These limits ensure structural serviceability and prevent damage to finishes.
Features
- Multiple beam types and loading conditions
- Accurate deflection calculations using standard formulas
- Bending moment and shear force calculations
- Material presets (Steel, Aluminum, Concrete, Wood)
- Deflection limit checking (L/360)
- Save and load calculations
- Local storage for privacy
Engineering Disclaimer
This calculator is for preliminary design and educational purposes only. Always consult a licensed structural engineer for final design and verification. Results should be verified against applicable building codes.