Free RC corbel calculator to SANS 10100
Checks a reinforced concrete corbel under a vertical and a horizontal load with a strut-and-tie model, and draws the bars in elevation. Free, no install, and prints a calc sheet with clause references.
No install, no card. The result shows without an account; a free account opens every check with its clause, the calc sheet and the bending schedule for 3 designs a month (one calculator, 24 hours). Calculator packs, coming soon, remove the limit.
What the calculator checks.
Every check is shown with the working, the clause and a pass or fail.
- A short cantilever: av less than d, and the depth at the front at least half the depth at the face (SANS 10100-1 cl. 6.2.4.2.1)
- Strut-and-tie model: the concrete strut and the main tie for the vertical and horizontal load, with the 0.4 % minimum tie (cl. 6.2.4.2.3)
- Shear at the face with the enhanced vc × 2d/av (cl. 4.3.4.2)
- Horizontal links in the upper two-thirds of d, at least half the main tie, inside the sloping soffit and anchored (cl. 6.2.4.2.5)
- Bearing stress and width under the pad, and the pad clear of the front edge (cl. 6.2.4.4 and 6.2.4.5)
- Welded cross bar or loop at the front, anchorage of the main bars into the column, durability cover and fire resistance
Codes: SANS 10100-1 (cl. 6.2.4.2 concrete corbels), with SANS 2001-CC1 cover for exposure; or Eurocode 2 (EN 1992-1-1 Annex J.3 and cl. 6.5)
A tool to check a design, not a design approval. Check the results and have the design signed by a registered professional engineer.
Short answers.
About this free calculator.
Is the RC corbel calculator free?
Yes. It is free to use: enter your own values and every check shows on the page with its result.
Do I need an account?
No account is needed to use it: every check shows on the page with its result and clause, with a calc sheet summary. Without an account you see the result. A free STATIX account (email or Google, no card) opens every check with its clause, the full calc sheet to print or save as a PDF and the SANS 282 bending schedule for 3 designs a month (one calculator, open for 24 hours). Paid plans, coming soon, will make them unlimited.
Which code clauses does it use?
The calc sheet names the clause on every step: SANS 10100-1 cl. 6.2.4.2 for the corbel, cl. 4.3.4.2 for shear near the support, cl. 6.2.4.4 for bearing and cl. 4.11.6 for anchorage.
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Leave your email and we will tell you when each part is ready for testing. One confirmation now, one message then. A short monthly update only if you tick the box.