Column Reinforcement Calculator
Calculate column reinforcement including main bars, ties, and capacity per ACI 318 requirements.
Column Parameters
Steel Percentage
1.95%
6.32 in² of 324.0 in² gross area
Steel ratio within ACI limits (1% - 8%)
Tie spacing: 12" (Max allowed: 16.0")
Axial Capacity
949
kips (phi*Pn)
Number of Ties
13
@ 12" spacing
Rebar Summary
Main Bars8-#8 @ 17.0 ft each
Lap Length5.0 ft
Total Main Bar Length136.0 ft
Total Tie Length78.0 ft
Steel Weight
363.1
Main (lbs)
29.3
Ties (lbs)
392.4
Total (lbs)
ACI 318 Column Requirements
Longitudinal Steel
- Minimum: 1% of gross area (0.01Ag)
- Maximum: 8% of gross area (0.08Ag)
- Minimum 4 bars for rectangular columns
- Minimum 6 bars for circular columns
Tie Requirements
- Minimum tie size: #3 for bars up to #10
- Minimum tie size: #4 for bars #11 and larger
- Spacing: min of 16db, 48dt, or least dimension
- First tie within half spacing from joint