Volex Labs / Calculations / Precast hollow-core slab design.

Precast hollow-core slab design.

Enter the span, depth and loading, and Volex Anvil checks the precast hollow-core unit: the design load through the EC0 combination, the flexural capacity of the prestressed section, the shear (including web-shear tension near supports) and the span/load capacity against the manufacturer selection tables.

Hollow-core units are prestressed and depth-standardised, so the check confirms the chosen unit works for the span and imposed load, with the governing action reported.

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What Volex Anvil checks

Validated against the published example

Hollow-core floor unit — design load and moment EC0 §6.4.3 combination + precast manufacturer SW catalogues
QuantityPublishedVolex AnvilError
Design load nEd14.05 kPa14.05 kPa0.00%
Design moment MEd134.88 kNm134.89 kNm0.01%
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 use manufacturer data?
Yes — the depth and prestress of standard hollow-core units are used, and the capacity is compared with the manufacturer span/load tables.
Does it check shear near supports?
Yes — web-shear tension, which governs prestressed hollow-core near supports, is checked to EC2 §6.2.2.
Is it validated?
The design load and moment are checked against EC0 combinations and manufacturer catalogues — within 0.01%.
Free tier?
Yes — 10 calculations a month free; Pro (£29/month) adds unlimited runs and PDF calc sheets.

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