Calculate beam deflection, bending moment, and stress for various beam loading conditions.
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Enter Load, Length, Elastic Modulus, and Moment of Inertia
Steel: 200,000 N/mm², Concrete: 30,000 N/mm², Wood: 12,000 N/mm²
Common limits: L/250 (general), L/300 (floors), L/150 (roofs)
Choose your beam support type (simply supported, cantilever, fixed) and loading condition (point load, distributed load).
Input beam length, cross-sectional dimensions, and material properties including elastic modulus.
Enter the applied loads, their magnitudes, and positions along the beam span.
The calculator applies beam theory formulas to determine maximum deflection and stress.
Compare calculated deflection with allowable limits (typically L/250 to L/360 for different applications).
Choose support and load type, enter E and I, and check maximum deflection against span limits. Useful for quick serviceability checks.
Compute deflection and slope for standard cases with E and I inputs; quick checks for beams under typical loads.
Simply supported, cantilever, center load, UDL.
Elastic modulus and second moment.
Compare to span/deflection criteria.
Beam deflection calculator, E I deflection, UDL, point load
Important: This beam deflection calculator is designed for preliminary structural analysis and educational purposes using standard beam theory and established deflection formulas for common loading conditions. While calculations are based on recognized structural engineering principles and standard beam equations, actual beam behavior involves complex factors including material properties, connection details, lateral-torsional buckling, dynamic loading, and specific boundary conditions that require comprehensive structural analysis. For actual structural design, building construction, safety assessments, or load-bearing applications, always follow applicable building codes (IBC, AISC, ACI, etc.), obtain professional structural engineering review, and consult qualified structural engineers who can ensure compliance with safety standards and regulatory requirements for your specific structural application and loading environment.
Deflection is within typical limits for floors and sensitive applications. The beam meets serviceability requirements.
Deflection is acceptable for most roof applications but may be noticeable. Consider if this meets your specific requirements.
Deflection may be acceptable for some applications but could cause issues with finishes, doors, or user comfort.
Deflection exceeds typical limits and may cause structural or serviceability problems. Consider increasing beam size or adding support.