Base Plate Calculator
Size a steel column base plate based on column load and concrete strength.
How to Use the Base Plate Calculator
- Enter the column load in kilonewtons.
- Enter the concrete compressive strength in MPa.
- Click Calculate to get plate area, side, and thickness.
Casos de Uso
- •Steel column base plate design.
- •Preliminary sizing for steel structures.
- •Checking bearing on concrete pedestals.
- •Structural steel engineering education.
Fórmula
A = P / (0.85 × fc). Side = √A. Thickness ≈ 0.9 × side × √(fc/250).
Perguntas Frequentes
Why 0.85 × fc?
ACI 318 limits the bearing stress on concrete to 0.85 × fc when the bearing area equals the concrete area.
Is the thickness formula exact?
It is a simplified estimate. Full design uses the cantilever projection and plate yield strength.
What concrete strength is typical?
Commercial construction typically uses 25–40 MPa concrete.