🏛️ Structural Design Tool

Column Design Calculator

Preliminary column sizing & reinforcement — Calculate axial capacity, slenderness, and steel as per IS 456:2000 & ACI 318. Square, Rectangular & Circular columns.

Column Details
⬜ Square
▭ Rectangular
⬤ Circular
mm
mm
mm
kN

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Design Summary
Column Size
Gross Area (mm²)
Steel Area (mm²)
Capacity (kN)
Slenderness
Status
Reinforcement
Main Bars
Ties
Steel Ratio
% of Ag
Step-by-Step
DescriptionValue
💡 Formulas (IS 456): Ag = b×D | Asc = p×Ag | Pu = 0.4fck·Ac + 0.67fy·Asc | λ = Le/rmin
⚠️ Preliminary design only. Final design must consider moments, shear & detailing.

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🏛️ Column Design Calculator — Complete Guide

Our Column Design Calculator provides preliminary column sizing and reinforcement estimates based on IS 456:2000 and ACI 318 standards. Supports Square, Rectangular, and Circular columns with axial load capacity, slenderness checks, and steel detailing.

📖 How to Use

  1. Select column shape
  2. Enter dimensions & height
  3. Choose concrete/steel grade
  4. Enter axial load
  5. Click Calculate

❓ FAQs

Q: What is the minimum column size?

IS 456 recommends minimum 200mm × 200mm for residential columns with 4 bars of 12mm Ø.

Q: What steel ratio is best?

1-3% is standard. Below 1% is uneconomical, above 4% causes congestion.

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