# Column Design: RCC P-M Chart — IS 456, ACI 318, EC2, AS 3600

> IS 456, ACI 318, EC2, AS 3600 (iPhone/iPad app by hirenkumar patel.)

- Source: https://appshunter.io/ios/app/column-design-rcc-p-m-chart/id904184081 (this page in markdown: same URL + `.md`)
- Developer: [hirenkumar patel](https://appshunter.io/developer/393288416)
- Category: Productivity, Education
- Price: Free (on sale, was $1.99)
- Age rating: 4+
- Requires: iOS 15.0 · 50 MB
- Released: 2014-08-15
- Data updated: 2026-10-29

## What is Column Design?

Column Design checks reinforced concrete columns the way engineers do: with a strain-compatibility P–M interaction diagram built for your exact section, bars and design code. Enter the column and its loads and the utilisation, every code check, the steel the loads need and the full working update as you type.

FOUR DESIGN CODES
• IS 456:2000 — parabola-rectangle at 0.446 fck, Fig. 23 steel, 3D/7 pivot, cl. 39.6 biaxial, cl. 39.7 slender columns
• ACI 318-19 — Whitney block with β1, φ from εt (tied or spiral), 0.80φP0 cap, moment magnifier, Bresler reciprocal load
• EN 1992-1-1 (Eurocode 2) — αcc option (1.0 or UK 0.85), Table 3.1 high-strength concrete, nominal curvature, 5.8.9 biaxial
• AS 3600:2018 — α2 and γ block, straight line to the squash load, Table 2.2.2 φ (Amendment 2), moment magnifier, 10.6.4 biaxial

INTERACTION DIAGRAMS
• Nominal and design P–M curves about either axis, from pure tension to squash load
• Balanced point, decompression and pure bending marked
• Drag along the curve to read P, M, φ and the neutral axis depth
• See the compression zone and strain diagram for any point

DESIGN CHECKS
• Rectangular or circular sections with any number of bars
• Minimum eccentricity, slenderness and second-order moments for braced columns
• Biaxial bending by exact load contour and by the code's simplified method
• Reinforcement limits and the least steel that passes, with a bar suggestion

DESIGN CHARTS
• SP-16 style non-dimensional charts: p/fck curves for IS 456, steel ratio curves for ACI, EC2 and AS 3600
• Bars on two faces, four sides or in a circle; d'/D from 0.05 to 0.20; every common steel grade
• Touch the chart to read the steel needed for any load

MADE FOR iPHONE
• Five themes — Pearl, Midnight, Blueprint, Sandstone and Royal Gold — plus Auto
• Landscape layout with the chart beside the controls
• Share the design: the full working plus a picture of the section
• A theory guide to interaction diagrams and each code's rules

PRIVATE BY DESIGN
No account, no ads, no tracking and no internet connection needed.

Column Design is a checking and learning tool; a qualified engineer must verify every design.

## Is Column Design safe?

Not enough ratings yet to assess Column Design.

## Is Column Design legit?

Column Design: RCC P-M Chart appears to be a legitimate app. The AppsHunter Legitimacy Score for Column Design is 90 out of 100 points across 7 verification signals from App Store and developer data.


## Version history (last 3 releases)

### 2.0.1 — 2026-10-27

Column Design has been completely rebuilt.

• Exact strain-compatibility P–M diagrams replace the four-point chart
• Four codes: IS 456, ACI 318, Eurocode 2 and AS 3600
• Corrected IS 456 steel stresses (Fig. 23) and the d'/D input now used in every calculation
• Biaxial bending, slenderness and minimum eccentricity checks
• SP-16 style design charts, full working, five themes and landscape support
• Zoom any chart: buttons, pinch and two-finger drag

### 1.2 — 2017-09-11

-Better Visual Interface.
-Compatible to iOS version 10x 
-Minor Bug fixes

### 1.0 — 2014-08-15

No release notes.

## More apps by hirenkumar patel

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All apps by hirenkumar patel: https://appshunter.io/developer/393288416

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