Volex Labs / Calculations / Concrete anchor and holding-down bolt design to EN 1992-4.

Concrete anchor and holding-down bolt design to EN 1992-4.

Enter the anchor layout, embedment and the tension and shear actions, and Volex Anvil checks every EN 1992-4 failure mode: steel failure of the anchor, concrete cone breakout, pull-out, and edge/splitting — in tension and shear, plus the combined interaction — and reports the governing resistance.

The concrete cone method (CCD) and the partial factors follow EN 1992-4, so the design covers cast-in and post-installed anchors to the current fastening code.

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What Volex Anvil checks

Validated against the published example

Anchor group — steel and concrete-cone tension resistance EN 1992-4 §7.2.1.3 Eq (7.1); CEN/TS 1992-4 D.1
QuantityPublishedVolex AnvilError
Steel tension resistance NRd,s109.2 kN109.1 kN0.09%
Concrete cone resistance NRd,c33.7 kN33.7 kN0.00%
This case is one of 359 published checks the platform passes — the full table, with every source and every error, is public at volexlabs.com/verification.

Frequently asked

Cast-in or post-installed?
Both — cast-in headed anchors and post-installed mechanical/bonded anchors are covered, with the appropriate concrete-cone and pull-out models.
Does it do anchor groups?
Yes — group effects on the concrete cone, edge distance and spacing are included per EN 1992-4.
Is it validated?
The steel and concrete-cone resistances are checked against EN 1992-4 — within 0.09%.
Free to use?
Yes — 10 calculations a month free; Pro (£29/month) adds unlimited runs and PDF calc sheets.

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