Instructions

1 – Click Choose File to import a PDF floor plan into the drafting panel. Ensure the plan extends across the full page width for best clarity. Overlaying is optional — you may draft the entire plan directly within TribKALC.

2 – Calibrate the drawing scale. Click the Calibration icon (two rulers), measure any known dimension on the plan, and enter the true value when prompted. You may recalibrate at any time before running the analysis. Tip: include a known dimension on your PDF drawing and calibrate against it.

3 – Trace the slab edge. Click the Slab icon and begin clicking to define slab perimeter points. Each click creates a segment. Double-click to complete the slab.

4 – Insert columns using the Column tool.

5 – Draw walls and cores using the relevant tools.

6 – Adjust the mesh size as required. Smaller mesh sizes increase accuracy but will increase analysis time.

7 – Click Analyse to generate tributary areas and column loads. You will be prompted to save the file — this allows you to reopen and revise your model at any time.

8 – Use Undo / Redo (up to 50 steps) to revise drafting actions.

9 – Use Zoom and Pan freely — results remain visible while navigating.

10 – Open the Column Optimiser (AS3600-2018) to:

• Optimise rectangular or circular columns
• Set global minimum widths or shapes
• Iterate to approximately 85–90% utilisation under ULS
• Print a professional optimisation report including plan output

11 – Click any column tag in the optimiser table to verify the design directly in the RKALC Concrete Calculator.

12 – Press SHIFT to activate Ortho Mode while drafting.

Watch tutorial video

For feedback or feature requests, contact admin@rkalc.net
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