Volex Labs / Calculations / Reinforced concrete fire design to Eurocode 2.

Reinforced concrete fire design to Eurocode 2.

Enter the section, cover and fire period, and Volex Anvil checks the RC member in fire: the required axis distance to the reinforcement against the EC2-1-2 tabulated data, the reduced cross-section by the 500°C isotherm method, and the reduced moment resistance MRd,fi with the strength of the heated reinforcement.

Both the simple tabulated method and the 500°C isotherm calculation follow EN 1992-1-2 §5, so the axis distance and fire resistance match the code for beams, slabs and columns.

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What Volex Anvil checks

Validated against the published example

RC beam in fire — reduced section and moment resistance EN 1992-1-2 §5.2 axis distance; Annex B.1 500°C isotherm method
QuantityPublishedVolex AnvilError
Reduced section width b (500°C)266 mm266 mm0.00%
Fire moment resistance MRd,fi193.5 kNm193.5 kNm0.00%
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

Tabulated or calculated?
Both — the simple tabulated axis-distance method for quick checks, and the 500°C isotherm reduced-section calculation for a full assessment.
Beams, slabs and columns?
Yes — the axis-distance requirements and reduced section apply to beams, slabs, walls and columns for the required fire period.
Is it validated?
The reduced section and fire moment resistance are checked against EC2-1-2 — within 0.00%.
Free tier?
Yes — 10 calculations a month free; Pro (£29/month) adds unlimited runs and PDF calc sheets.

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