CoLateral
Design Checker

CLT and Mass Timber Panel Designer

Preliminary CSA O86 CLT floor and roof panel design - continuous spans, point loads, live force diagrams, bending, rolling shear, bearing, deflection, and vibration-controlled span on PRG 320 layups.

Design CheckerCSA O86Design aid
CLT and Mass Timber Panel Designer running in the CoLateral workspace
CLT and Mass Timber Panel Designer in the CoLateral desktop workspace.

What it does

Preliminary CSA O86:19 Clause 8 design of CLT floor and roof panels on a 1 m strip using standard PRG 320 E1 and V2 stress-grade layups (105/175/245 mm), with click-to-add interior supports (continuous panels) and point loads solved by a Timoshenko continuous-beam analysis with live shear, moment, and deflection diagrams. 0 creep factor, and the Canadian CLT Handbook vibration-controlled span, with CSA O86 modification factors selected from dropdowns.

What it does not do

Section properties are derived from standard layups by the shear-analogy method and must be confirmed against the manufacturer's PRG 320 certificate. Point loads are applied to the 1 m strip without effective-width spread; pattern (skip) live loading is not auto-generated. Wall panels, diaphragms, two-way action, openings, fire (char) design, minor-direction spanning, and connections are not implemented.

No final sealed design claim is made; engineer review is always required.

How to use it

Use for preliminary CLT floor and roof panel sizing and schematic review only. Confirm manufacturer layup, EIeff, GAeff, rolling shear, fire rating, vibration of the finished assembly, and connection detailing before project use.

Covers

woodcltmass timberpanelfloorroofrolling shearvibrationprg 320o86design aid

Use CLT and Mass Timber Panel Designer in your own projects

Every tool ships inside the CoLateral desktop workspace, so a result can stay attached to the project, the drawing, and the review trail it belongs to instead of ending up in a loose spreadsheet.

Outputs are design aids and stay in draft until a qualified engineer reviews and approves them.