Content page

From [Institution name]

"TimberStrand® LSL" Specified Strengths (MPa)^{Footnote (1)} ^{Footnote (2)} ^{Footnote (7)}
Grade	Modulus of Elasticity (MOE)	Axial		Joist or Beam^{Footnote (1)}			Plank^{Footnote (1)}
Grade	Modulus of Elasticity (MOE)	Tension Parallel to Grain F_t^{Footnote (3)}	Compression Parallel to Grain F_c	Flexure F_b^{Footnote (4)} ^{Footnote (5)}	Shear F_v	Compression Perpendicular to Grain F_cperp	Flexure F_b^{Footnote (6)}	Shear F_c	Compression Perpendicular to Grain F_cperp^{Footnote (12)}
1.30E	8 965	13.70	20.21	21.65	5.39	8.92	24.20	1.95	7.92^{Footnote (13)}
1.35E	9 310	15.05	20.94	23.41	5.66	9.39	26.19	1.95	8.27
1.40E	9 655	16.40	21.68	25.18	5.93	9.87	28.18	1.95	8.62
1.45E	9 995	17.75	22.41	26.94	6.19	10.34	30.16	1.95	8.98
1.50E	10 345	19.10	23.14	28.70	6.46	10.81	32.15	1.95	9.33
1.55E	10 685	20.40	23.88	29.60	6.73	11.28	33.30	1.95	9.69
1.60E	11 030	21.65	24.61	30.90	7.00	11.75	34.40	1.95	10.04^{Footnote (14)}
1.65E	11 375	22.45	25.35	32.03	7.27	12.23	35.68	1.95	10.39
1.70E	11 720	23.25^{Footnote (8)}	26.08	33.15	7.54	12.70	36.95	1.95	10.75
1.75E	12 065	24.29	26.82	34.66	7.81	13.17	38.70	1.95	11.10

"TimberStrand® LSL" Specified Strengths (MPa)^{Footnote (1)} ^{Footnote (2)} ^{Footnote (7)} (cont.)
Grade	Modulus of Elasticity (MOE)	Axial		Joist or Beam^{Footnote (1)}			Plank^{Footnote (1)}
Grade	Modulus of Elasticity (MOE)	Tension Parallel to Grain F_t^{Footnote (3)}	Compression Parallel to Grain F_c	Flexure F_b^{Footnote (4)} ^{Footnote (5)}	Shear F_v	Compression Perpendicular to Grain F_cperp	Flexure F_b ^{Footnote (6)}	Shear F_c	Compression Perpendicular to Grain F_cperp^{Footnote (12)}
1.80E	12 410	25.33	27.55^{Footnote (9)}	36.18	8.07^{Footnote (10)}	13.64^{Footnote (11)}	40.45	1.95	11.45
1.85E	12 755	26.36	27.55^{Footnote (9)}	37.69	8.07^{Footnote (10)}	13.64^{Footnote (11)}	42.20	1.95	11.81
1.90E	13 100	27.40	27.55^{Footnote (9)}	39.20	8.07^{Footnote (10)}	13.64^{Footnote (11)}	43.95	1.95	12.16
1.95E	13 445	28.51	27.55^{Footnote (9)}	40.55	8.07^{Footnote (10)}	13.64^{Footnote (11)}	45.46	1.95	12.52
2.00E	13 790	29.63	27.55^{Footnote (9)}	41.90	8.07^{Footnote (10)}	13.64^{Footnote (11)}	46.98	1.95	12.87
2.05E	14 135	30.74	27.55^{Footnote (9)}	43.25	8.07^{Footnote (10)}	13.64^{Footnote (11)}	48.49	1.95	13.22
2.10E	14 480	31.85	27.55^{Footnote (9)}	44.60	8.07^{Footnote (10)}	13.64^{Footnote (11)}	50.00	1.95	13.58

Notes:

Footnote 1

See Figure 2 for strand orientation.

Return to footnote 1 referrer

Footnote 2

Specified strengths are based on covered, dry service conditions of use. "Dry service conditions of use" are those in which a 19% MC will not be exceeded.

Return to footnote 2 referrer

Footnote 3

F_t values reflect the volume effects of length, depth and thickness for a range of common application conditions. The F_t values for the product may be higher when approved by Weyerhaeuser for use as a component of engineered products, which are manufactured under a recognized quality control program.

Return to footnote 3 referrer

Footnote 4

For product depths other than 305 mm, regardless of thickness, multiply table values by (305/d)^0.092. Adjustments for common depths are shown below. For product depths less than 89 mm, use the factor for the 89-mm depth.

Depth (mm)	89	140	184	241	305	406	457	610
Multiplier	1.12	1.07	1.05	1.02	1.00	0.97	0.96	0.94

Return to footnote 4 referrer

Footnote 5

When structural members qualify as repetitive members in accordance with CSA O86-14, a 4% increase is permitted for F_b in addition to the increases permitted in Table Note 4.

Return to footnote 5 referrer

Footnote 6

Values shown are for thicknesses up to 89 mm.

Return to footnote 6 referrer

Footnote 7

Simple span uniform load deflection is calculated as follows:

$Δ = \frac{156 W L^{4} \times 10^{6}}{E b d^{3}} + \frac{2400 W L^{2}}{E b d}$

where:

Δ = deflection, mm

E = modulus of elasticity (shear-free), MPa W = specified uniform load, N/m

L = span, m

b = beam width, mm

d = beam depth, mm

Return to footnote 7 referrer

Footnote 8

When "TimberStrand® LSL" 1.7E grade is used as truss chords and webs of engineered wood trusses, the specified axial tension strength is 26.15 MPa, which includes an adjustment for length effect. "TimberStrand® LSL" material must be marked as "Truss Chord Grade," and the engineered wood trusses must be manufactured under a recognized quality control program. The plate tooth-holding values for "TimberStrand® LSL" web and chord members are as listed in other Evaluation Reports.

Return to footnote 8 referrer

Footnote 9

Specified strength conservatively capped at 27.55 MPa.

Return to footnote 9 referrer

Footnote 10

Specified strength conservatively capped at 8.07 MPa.

Return to footnote 10 referrer

Footnote 11

Specified strength conservatively capped at 13.64 MPa.

Return to footnote 11 referrer

Footnote 12

Fcperp shall not be increased for the duration of load.

Return to footnote 12 referrer

Footnote 13

Specified strength is for product labeled "Rim Board." For all other 1.3E products, use 8.39 MPa.

Return to footnote 13 referrer

Footnote 14

For thicknesses less than 64 mm, use 11.22 MPa.

Return to footnote 14 referrer

"TimberStrand® LSL" Fastener Detail: All Grades
Fastener Property	Nail Orientation	Load Direction	Specific Gravity of Equivalent Species for Design Purposes
Nail withdrawal	edge	withdrawal	S-P-F, SG = 0.42
Nail withdrawal	face	withdrawal	D Fir – L (N), SG = 0.501
Lateral nail capacity	edge	parallel to grain	D Fir – L (N), SG = 0.50
	edge	perpendicular to grain	D Fir – L (N), SG = 0.50
	face	parallel to grain	D Fir – L (N), SG = 0.50
	face	perpendicular to grain	D Fir – L (N), SG = 0.50
Bolt bearing capacity	—	parallel to grain	D Fir – L (N), SG = 0.50
Bolt bearing capacity	—	perpendicular to grain	D Fir – L (N), SG = 0.50
Lag screw capacity	Bolt Size	Load Direction	Specified Strength (N)
	12.7 mm	parallel to grain	2 820^{Footnote (1)}
	12.7 mm	perpendicular to grain	2 820^{Footnote (1)}

Nail Spacing Requirements for "TimberStrand® LSL"
Closest On Centre Nail Spacing Parallel to WFS Orientation (mm)^{Footnote (1)} ^{Footnote (2)}
Common Nail Size	Nominal Member Thickness (mm)
	32		38		44.5-89			89
	1 Row	2 Rows	1 Row	2 Rows	1 Row	2 Rows	3 Rows	3 Rows
63.5 mm × 3.33 mm	102	102	76	76	76	76	76	76
76 mm × 3.75 mm	102	102	76	76	76	76	76	76
89 mm × 4.11 mm	152^{Footnote (3)}	152^{Footnote (3)}	152^{Footnote (3)}	152^{Footnote (3)}	152^{Footnote (4)}	152^{Footnote (4)}	152^{Footnote (4)}	152^{Footnote (4)}

Notes:

Footnote 1

The closest on centre (o.c.) spacing for nails perpendicular to the WFS is the same as permitted by the NBC 2015 for sawn lumber.

Return to footnote 1 referrer

Footnote 2

Member edge distance and spacing between the rows shall be 2.5 times the diameter or 9.5 mm, whichever is greater. Where multiple rows are used, fasteners in adjacent rows must be staggered and the rows must be equally spaced from the centreline of the narrow face axis.

Return to footnote 2 referrer

Footnote 3

When nailing through the wall sill plate and floor sheathing, such that the maximum nailing penetration into member is 32 mm, the minimum allowable o.c. spacing may be decreased to 102 mm.

Return to footnote 3 referrer

Footnote 4

When nailing through the wall sill plate and floor sheathing, such that the maximum nailing penetration into member is 32 mm, the minimum allowable o.c. spacing may be decreased to 89 mm.

Return to footnote 4 referrer

"TimberStrand® LSL" 1.3E Rim Board Factored Resistance Values^{Footnote (1)}
Nominal Thickness (mm)	Limit States Design Factored Vertical Load Resistance^{Footnote (2)} (kN/m)	Depth Range (mm)
32^{Footnote (3)}	98.20	≤ 406
32^{Footnote (3)}	79.75	> 406, ≤ 508
38	95.65	≤ 610

"TimberStrand® LSL" Stud and Shear Wall Applications^{Footnote (1)} ^{Footnote (2)}
"TimberStrand® LSL" Grade	Nailing^{Footnote (3)} ^{Footnote (4)}	Species Factor for Framing Material (Jsp)
Grade^{Footnote (5)} < 1.5E	panel edge nailing of 150 mm	0.8
1.5E ≤ Grade < 1.6E	panel edge nailing of 75 mm^{Footnote (6)} to 150 mm	0.8
1.6E ≤ Grade ≤ 1.7E	panel edge nailing of 75 mm to 150 mm	1.0

Notes:

Footnote 1

The product may be used as wall stud material in accordance with the prescriptive requirements of Part 9 of the NBC 2015. The specified shear strength for nailed structural panel shear walls using the product framing is equivalent to lumber and must be determined in accordance with Table 9.5.1A of CSA O86-14 for the specified nail spacing in Table 4.1.5 and species factor.

Return to footnote 1 referrer

Footnote 2

See Appendix B for conditions and limitations on stud and shear wall applications.

Return to footnote 2 referrer

Footnote 3

See Appendix B, Note 12.

Return to footnote 3 referrer

Footnote 4

For unblocked walls, the nails must not exceed D = 3.3 mm (0.13 in.) (8d) and 64 mm (2.5 in.), nor be placed closer than 150 mm (6 in.) o.c. For blocked walls, the nails must not exceed D = 3.7 mm (0.15 in.) (10d) and 76 mm (3 in.), nor be placed closer than 76 mm (3 in.) o.c.

Return to footnote 4 referrer

Footnote 5

"TimberStrand® LSL" 1.3E grade must have a minimum average density of 39 lb/ft³.

Return to footnote 5 referrer

Footnote 6

The minimum panel edge nail spacing of 75 mm is currently limited by the scope of the CCMC Technical Guide development tests.

Return to footnote 6 referrer

Language selection

Search

Content page