Technical Resources
Specs, spans & fire ratings.
Everything you need to specify Dowel Laminated Timber — panel span tables, fire-resistance ratings, and physical properties. Figures are preliminary and will be confirmed at Canadian Construction Materials Centre (CCMC) evaluation.
Span Guide
Panel span tables.
Lamella (on edge)
Panel depth
Roof · 0.5 kPa
Floor · 1.9 kPa
Floor · 4.8 kPa
2×4
89 mm
3.6 m
2.9 m
2.2 m
2×6
140 mm
5.8 m
4.7 m
3.6 m
2×8
184 mm
7.9 m
6.4 m
4.9 m
2×10
235 mm
9.8 m
8.1 m
6.2 m
2×12
286 mm
11.6 m
9.6 m
7.4 m
Preliminary allowable clear spans for single-span DLT panels at deflection limit L/300. Confirm final spans with project engineering.
Fire Performance
Fire-resistance ratings.
Assembly
Char Rate
Sacrificial Depth
Fire-Resistance Rating
2×6 exposed (140 mm)
0.65 mm/min
46 mm
60 min
2×8 exposed (184 mm)
0.65 mm/min
66 mm
90 min
2×12 exposed (286 mm)
0.65 mm/min
85 mm
120 min
2×12 + ⅝-inch (15.9 mm) Type X gypsum board
Protected
—
180 min
Calculated per the CSA O86 zero-strength-layer method: char at 0.65 mm/min plus a 7 mm zero-strength layer. Preliminary — residual section capacity must be confirmed by project engineering, and ratings will be confirmed by testing at certification.
Physical Properties
Panel specifications.
Property
Value
Lamella species
SPF (spruce-pine-fir), machine stress-graded
Dowel species
Maple / birch hardwood, kiln-dried
Maximum panel width
12 ft (3,660 mm)
Maximum panel length
60 ft (18,288 mm)
Panel depth range
3½ – 11¼ in (89 – 286 mm) · 2×4 to 2×12 lamella
Mean density
≈ 470 kg/m³
Service moisture content
12% ± 2%
Specified bending strength (fb)
11.8 MPa · CSA O86
Thermal conductivity
0.12 W/m·K
Reaction to fire
Exposed mass timber, no coatings
Typical values for Engrained DLT. Final certified values will be published following Canadian Construction Materials Centre (CCMC) evaluation.
Documentation
Get the full documentation pack.
Span tables, the fire-resistance report, and the full panel spec sheet — sent to your inbox. You’ll also be first to know at certification and production launch.
Span & load tables
Included · PDF
Fire-resistance report
Included · PDF
Panel spec sheet
Included · PDF
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Specifying DLT on a project?
Send us your loads, spans, and fire requirements — we’ll return sized options and the supporting documentation.