timberColumnAS1720.1-2010ITI
Run the calcThe Calcs.com timber column calculator to AS 1720.1:2010 enables the fast and accurate design of timber columns and studs to Australian standards. With support for dynamic load linking between beams and columns, easily design accurate and quality engineered columns, and select from our database of thousands of Australian timber sections.
Method & scope
About this calculator
The Calcs.com timber column calculator to AS 1720.1:2010 enables the fast and accurate design of timber columns and studs to Australian standards. With support for dynamic load linking between beams and columns, easily design accurate and quality engineered columns, and select from our database of thousands of Australian timber sections.How to use it
1
Open the calculator
Open it from Run calc in the About this calculator panel above.
2
Enter your inputs
Work through the input sections from top to bottom. Click any input label to see its reference explanation, clause, conditions and assumptions. See Checks, References, Conditions and Assumptions.
3
Review the results and export
Check the utilization of each governing check in the summary, then export a PDF report. See Views and Export.
Common questions
What is the ITI version of this calculator and how does it differ?
What is the ITI version of this calculator and how does it differ?
This is the ITI (Internal Template Integration) version of the Timber Column calculator to AS 1720.1:2010 Amendment 3. It follows the same Limit State Design methodology as the standard version but includes an extended set of ready-made presets for common column and stud configurations used in ITI projects, such as common stud with bottom plate and loaded post configurations.
What inputs does the ITI timber column calculator require?
What inputs does the ITI timber column calculator require?
Key inputs include column height, effective length factors for both axes, section type from the Australian timber section database, number of plies, applied loads, and service conditions. Presets for common stud-and-bottom-plate and isolated post configurations pre-fill many settings to speed up routine designs.
What checks and outputs does the calculator provide?
What checks and outputs does the calculator provide?
Checks include axial compression utilization (N*/phiNd ≤ 1.0), biaxial bending (M*/phiMd ≤ 1.0), combined bending plus axial, and stability factors k12 and k8 per AS 1720.1. Results are shown as demand-to-capacity ratios where values at or below 1.0 indicate adequate capacity.
Can I configure stud walls and combined post configurations with the presets?
Can I configure stud walls and combined post configurations with the presets?
Yes. Presets include generic columns, interior and exterior stud walls with bottom plate, and loaded post configurations, allowing users to quickly set up common scenarios without manually entering all section properties. Each preset can be further customized once loaded.
How does the calculator handle combined bending and axial load?
How does the calculator handle combined bending and axial load?
Combined compression and biaxial bending is checked using the interaction equation per AS 1720.1 Section 3.7. The stability factor k12 is derived from the greater slenderness ratio across both axes, and the resulting demand-to-capacity ratios for axial and bending are combined to verify that the member remains adequate under all applied load combinations.
How do I use dynamic load linking with this calculator?
How do I use dynamic load linking with this calculator?
Add this column to the same project as your beam calculators. Once linked, column axial loads are drawn automatically from beam reactions above, keeping your calculations synchronized whenever beam sizing changes. This eliminates manual load transfer between spreadsheets and ensures the full load path, beam to column to footing, stays consistent.
Next steps
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