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Table 1. Dimensional Tolerances of the CLT Panel at the Time of Manufacturing
Dimension Tolerance (mm (in.)) Footnote (1)
Thickness Stricter of ± 1.6 (1/16) or 2% of specified thickness
Width ± 3.2 (1/8) of specified width
Length ± 6.4 (1/4) of specified length
Squareness ± 3.2 (1/8) difference in diagonals' length
Straightness ± 1.6 (1/16) deviation of edges from a straight line

Component Requirements

Table 2. Tabulated Component Requirements of Lumber and SCL Laminations
Property Requirement
Lumber species or species combination Footnote (1) Any species or species combination recognized by the Canadian Lumber Standards Accreditation Board under CSA O141 Footnote (2)
Minimum specific gravity 0.35
Minimum lumber grades Footnote (1) parallel layers Footnote (3) 1200f-1.2E MSR or Visual grade No. 2
perpendicular layers Footnote (4) Visual grade No. 3

Lamination sizes

major strength direction Lamination width ≥ 1.75 × lamination thickness for parallel layers
minor strength direction Lamination width ≥ 3.5 × lamination thickness for the perpendicular layers Footnote (5)
both directions 51 mm (2 in.) ≥ lamination net thickness Footnote (5) ≥ 16 mm (5/8 in.)
Moisture content Footnote (6) 12 ± 3%

Face-bonding

surface preparation Planed and cleaned
dimensional tolerance – variation in thickness ± 0.2 mm (0.008 in.) across the width
± 0.3 mm (0.012 in.) along the length
Standards on requirements for adhesives CSA O112.10
Sections 2.1.3 and 3.3 of AITC 405 Footnote (7)
Section 6.1.3.4 of DOC PS1 Footnote (8)
Lamination Joints end joints Section 9.5 of CSA O177
edge and face joints Sections 9.2 and 9.3 of CSA O177 except for shear strength
Table 3. Required Characteristic Test Values - Grade V2 Footnote (1) Footnote (2)
Major Strength Direction (MPa) Minor Strength Direction (MPa)
f b,0 E 0 f t,0 f c,0 f v,0 f s,0 f b,90 E 90 f t,90 f c,90 f v,90 f s,90
12.7 9 653 6.5 15.1 2.9 0.97 7.2 8 274 3.6 8.5 2.9 0.97
Table 4. Specified Strength and Modulus of Elasticity - Grade V2 Footnote (1) Footnote (2)
Major Strength Direction (MPa) Minor Strength Direction (MPa)
f b,0 E 0 f t,0 f c,0 f v,0 f s,0 f b,90 E 90 f t,90 f c,90 f v,90 f s,90
11.8 9,500 5.5 11.5 1.5 0.50 7.0 9,000 3.2 9.0 1.5 0.50
Table 5. Limit States Design Bending Resistances - Grade E1 Footnote (1)
CLT thickness (mm) Lamination Thickness (mm) in CLT Layup Major Strength Direction Minor Strength Direction
f b S eff,0 (10 6 N- mm/m) EI eff,0 (10 9 N-mm 2 /m) GA eff,0 (10 6 N/m) f b S eff,90 (10 6 N- mm/m) EI eff,90 (10 9 N-mm 2 /m) GA eff,90 (10 6 N/m)
105 35 35 35 18 884 7.2 1.4 32 7.5
175 35 35 35 35 35 41 3 388 14 12 836 15
245 35 35 35 35 35 35 35 72 8 388 22 28 3 183 23