Beam Deflection Calculator
Calculate maximum deflection and stress in simply supported beams under point loads
About this calculator
This beam deflection calculator determines the maximum deflection and stress in simply supported beams subjected to point loads. It's essential for structural engineers, architects, and construction professionals to ensure beam safety and compliance with building codes. The calculator helps verify that beams won't exceed allowable deflection limits or stress thresholds, preventing structural failure and ensuring occupant safety in buildings and bridges.
How to use
Enter your beam's length, cross-sectional properties (moment of inertia), material properties (elastic modulus), and applied point load magnitude and position. The calculator will instantly compute the maximum deflection and bending stress values, helping you assess whether the beam meets design requirements.
Frequently asked questions
What is maximum allowable deflection for beams?
Typically L/360 for floors and L/240 for roofs, where L is the span length, though building codes may specify different limits.
How does load position affect deflection?
Maximum deflection occurs when the point load is applied at mid-span. Loads closer to supports produce less deflection.
What beam properties do I need for calculation?
You need beam length, moment of inertia, elastic modulus of the material, and the magnitude and position of applied loads.