Volex Labs / Calculations / Composite metal-deck slab design to Eurocode 4.

Composite metal-deck slab design to Eurocode 4.

Enter the deck profile, slab depth and span, and Volex Anvil designs the composite slab in two stages: the profiled decking acting alone at the construction stage (strength and deflection under wet concrete), and the composite slab in service — the moment resistance, the longitudinal shear by the m-k or partial-connection method, and the composite deflection.

The two-stage design follows EC4 §9, so the construction-stage deflection and the composite capacity match the code and the decking manufacturer load-span tables.

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What Volex Anvil checks

Construction-stage decking strength & deflection — EC4 §9.3
Composite moment resistance MRd — EC4 §9.7.2
Longitudinal shear (m-k / partial connection) — EC4 §9.7.3
Vertical & punching shear — EC4 §9.7.5
Composite deflection (SLS) — EC4 §9.8

Validated against the published example

Composite slab — design moment and construction deflection EC4 §9 (EN 1994-1-1); manufacturer decking load-span data

Quantity	Published	Volex Anvil	Error
Design moment MEd	16.04 kNm/m	16.04 kNm/m	0.02%
Construction deflection (propped)	2.28 mm	2.28 mm	0.00%

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

Does it check the construction stage?

Yes — the profiled decking is checked acting alone under the weight of wet concrete and construction loads, propped or unpropped, which often governs the deck gauge.

Which longitudinal-shear method?

Either the empirical m-k method or the partial-connection method of EC4 §9.7.3, depending on the decking data available.

Is it validated?

The design moment and construction deflection are checked against EC4 — within 0.02%.

Free tier?

Yes — 10 calculations a month free; Pro (£29/month) adds unlimited runs and PDF calc sheets.

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