Eccentric column
TCVN 5574:2018Check provided steel or design symmetric steel for a rectangular column under one-axis N + M per TCVN 5574:2018 §8.1.2.
About the eccentric column tool
Check or design symmetric reinforcement for a rectangular column in uniaxial eccentric compression (N + M) per §8.1.2 TCVN 5574:2018.
What you enter
In check mode: section, materials, provided reinforcement and the (N, M) combination. In design mode: just section, materials and internal forces.
What the results mean
The section's N–M interaction diagram with a verdict on whether the combination lies inside the resistance region; in design mode, the required symmetric steel area As.
When to use this tool
Verifying grid columns of framed buildings; finding a workable As when changing concrete or steel grade while keeping N ≤ Ncap.
Calculation method
This tool checks or designs symmetric reinforcement for a rectangular column under one-axis eccentric compression (N + M) per TCVN 5574:2018 §8.1.2.
In check mode, enter the provided steel; the tool builds the N–M interaction diagram and concludes whether the (N, M) combination falls inside the load-bearing region. In design mode, it proposes a symmetric reinforcement area As that satisfies the code.