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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
Minimum lumber grades ^{Footnote (1)}	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
	dimensional tolerance – variation in thickness	± 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
Lamination Joints	edge and face joints	Sections 9.2 and 9.3 of CSA O177 except for shear strength

Notes to Table 2:

Footnote 1

This requirement does not apply to SCL laminations.

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Footnote 2

Within a single layer of the CLT panel, the same species or combination thereof has to be used. However, species can be different between adjacent layers.

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Footnote 3

Parallel layers refer to the layers that will be parallel to the load direction, i.e., parallel to the major strength direction.

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Footnote 4

Perpendicular layers refer to the layers that will be perpendicular to the load direction, i.e., perpendicular to the minor strength direction.

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Footnote 5

This width is only required when the parallel layers are not edge bonded. Furthermore, an alternative is allowed by the standard to forgo this requirement by demonstrating interlaminar shear strength and creep performance through specified testing.

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Footnote 6

This requirement refers to the moisture content at the time of manufacturing.

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Footnote 7

The requirements for heat durability in ASTM D 7247.

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Footnote 8

Evaluation for heat performance.

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Table 3. Required Characteristic Test Values - Grade E2 ^{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
23.9	10 342	14.8	22.3	3.9	1.31	7.6	9 653	4.7	10.1	3.9	1.31

Notes to Table 3:

Footnote 1

fb,0 is the characteristic bending strength parallel to the major strength direction of the CLT.

E0 is the modulus of elasticity in bending parallel to the major strength direction of the CLT.

ft,0 is the characteristic tensile strength parallel to the major strength direction of the CLT.

fc,0 is the characteristic compressive strength parallel to the major strength direction of the CLT.

fv,0 is the characteristic shear strength parallel to the major strength direction of the CLT.

fs,0 is the characteristic interlaminar (rolling) shear strength parallel to the major strength direction of the CLT.

fb,90 is the characteristic bending strength perpendicular to the major strength direction of the CLT.

E90 is the modulus of elasticity in bending perpendicular to the major strength direction of the CLT.

ft,90 is the characteristic tensile strength perpendicular to the major strength direction of the CLT.

fc,90 is the characteristic compressive strength perpendicular to the major strength direction of the CLT.

fv,90 is the characteristic shear strength perpendicular to the major strength direction of the CLT.

fs,90 is the characteristic interlaminar (rolling) shear strength perpendicular to the major strength direction of the CLT.

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Footnote 2

Tabulated values are test values and shall not be used for design.

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Table 4. Specified Strength and Modulus of Elasticity - Grade E2 ^{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
23.9	10,300	11.4	18.1	1.9	0.63	4.6	10,000	2.1	7.3	1.9	0.63

Table 5. Limit States Design Bending Resistances - Grade E2 ^{Footnote (1)}
CLT thickness (mm)	Lamination Thickness (mm) in CLT Layup							Major Strength Direction			Minor Strength Direction
CLT thickness (mm)	═	┴	═	┴	═	┴	═	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	–	–	–	–	36	958	8.0	0.94	36	8.2
175	35	35	35	35	35	–	–	83	3 674	16	8.1	929	16
245	35	35	35	35	35	35	35	146	9 097	24	19	3 537	25

Note to Table 5:

Footnote 1

The symbols that were previously used in Tables 3 and 4 are as defined in Note (1) to Table 3. Other symbols are defined as follows:

Seff is the effective section modulus (mm³/m) of the composite CLT section for calculating the moment capacity of CLT.

Ieff is the effective moment of inertia (mm⁴/m) of the composite CLT section for calculating the bending stiffness of the CLT.

G0 is the modulus of rigidity in parallel to the major strength direction of the CLT (MPa). In the standard, G0 = E0/16 for lumber.

G90 is the modulus of rigidity in perpendicular to the major strength direction of the CLT (MPa). In the standard, G90 = G0/10 for lumber.

Aeff is the effective cross sectional area (mm²/m) of the composite CLT for calculating the interlaminar shear capacity of the CLT.

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