Free online Column Design Calculator. Estimate concrete, vertical steel bars, stirrups, and shuttering area for building columns.
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How to Use Column Design Calculator
Enter column width, depth, and height.
Select the vertical rebar count and rebar diameter.
Enter stirrup diameter and tie spacing.
View structural quantities and cost estimates.
Structural Columns Design Criteria
Columns are primary vertical members that transfer compression loads down to footings. Design factors include axial loads, buckling ratios, concrete cover protection (minimum 40mm), and lateral confinement ties.
Minimum Rebar Standards
- Rectangular columns require a minimum of 4 longitudinal bars.
- Circular columns require a minimum of 6 longitudinal bars.
- Minimum bar diameter should not be less than 12mm.
Frequently Asked Questions
What is the minimum steel percentage in columns?
Under IS 456, vertical reinforcement in columns must be at least 0.8% of the total cross-sectional area.
What spacing is standard for lateral ties (stirrups)?
Stirrups are typically spaced at 100mm near beam-column joints, and 150mm in mid-spans.