Volex Labs / Calculations / Cross-laminated timber (CLT) panel design to Eurocode 5.

Cross-laminated timber (CLT) panel design to Eurocode 5.

Enter the panel build-up (number of layers and thickness), span and loads, and Volex Anvil designs the CLT panel: the effective bending stiffness of the cross-laminated layup, the bending and rolling-shear stresses, the instantaneous and final (creep) deflection, and the floor vibration check.

The layered analysis follows EC5 Annex B and the composite theory used in the proHolz CLT Handbook and manufacturer design tables (KLH, Stora Enso). Panel thickness, layup and utilisation are all reported.

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What Volex Anvil checks

Effective bending stiffness (EI)eff — EC5 Annex B / shear analogy
Bending stress in outer laminations — EC5 §6.1
Rolling shear in cross layers — EC5 §6.1.7
Instantaneous + final deflection — EC5 §2.2.3 / §7.2
Floor vibration (fundamental frequency) — EC5 §7.3

Validated against the published example

5-ply 200 mm CLT residential floor — proHolz design tables proHolz CLT Handbook; KLH / Stora Enso design tables; EC5 Annex B

Quantity	Published	Volex Anvil	Error
Panel build-up	200 mm, 5-ply	200 mm, 5-ply	0.00%
Overall utilisation	0.581	0.581	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 rolling shear?

Yes — rolling shear in the cross (transverse) layers is a governing CLT check and is verified to EC5 §6.1.7 against the rolling-shear strength.

Does it include vibration?

Yes — the fundamental frequency and the EC5 §7.3 residential vibration criteria are checked, which often govern longer CLT floor spans.

What tables is it validated against?

The panel build-up and utilisation are checked against the proHolz CLT Handbook and manufacturer (KLH/Stora Enso) design tables — within 0.00% on the reported quantities.

Free to use?

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

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