CLT design properties.
CLT design properties.
CLT design properties.
CLT design properties.
Cross-laminated timber (CLT) is a structural panel made from fastening layers of dimensional lumber on top of one another, with the grain direction alternating in each layer perpendicular to the layer below it. The result is a finished panel with strength in two directions, making it ideal for structural applications in floor and wall assemblies. CLT is made from different wood species depending on the manufacturer, so it is important that designers always consult manufacturer-specific design values.
Cross-laminated timber (CLT) is a structural panel made from fastening layers of dimensional lumber on top of one another, with the grain direction alternating in each layer perpendicular to the layer below it. The result is a finished panel with strength in two directions, making it ideal for structural applications in floor and wall assemblies. CLT is made from different wood species depending on the manufacturer, so it is important that designers always consult manufacturer-specific design values.
Cross-laminated timber (CLT) is a structural panel made from fastening layers of dimensional lumber on top of one another, with the grain direction alternating in each layer perpendicular to the layer below it. The result is a finished panel with strength in two directions, making it ideal for structural applications in floor and wall assemblies. CLT is made from different wood species depending on the manufacturer, so it is important that designers always consult manufacturer-specific design values.
CLT by Stora Enso.
CLT by Stora Enso.
CLT by Stora Enso.
CLT by Stora Enso.
Fort Point Timber’s CLT products are officially supplied by Stora Enso. The below information and subsequent design values are provided by Stora Enso and correspond only to Stora Enso's CLT portfolio.
When working with Fort Point Timber, design teams should use the following information for specifying and designing CLT components.
Fort Point Timber’s CLT products are officially supplied by Stora Enso. The below information and subsequent design values are provided by Stora Enso and correspond only to Stora Enso's CLT portfolio.
When working with Fort Point Timber, design teams should use the following information for specifying and designing CLT components.
Fort Point Timber’s CLT products are officially supplied by Stora Enso. The below information and subsequent design values are provided by Stora Enso and correspond only to Stora Enso's CLT portfolio.
When working with Fort Point Timber, design teams should use the following information for specifying and designing CLT components.
Technical product description
Technical product description
Technical product description
Technical product description
CLT by Stora Enso is made of at least three single-layer panels that are bonded together with high-strength adhesive at a right angle. Each layer consists of a set of strength-graded boards that are finger-jointed and bonded together edge to edge. When these layers are bonded and pressed together, they form CLT panels that can be up to 39 feet long.
CLT by Stora Enso is made of at least three single-layer panels that are bonded together with high-strength adhesive at a right angle. Each layer consists of a set of strength-graded boards that are finger-jointed and bonded together edge to edge. When these layers are bonded and pressed together, they form CLT panels that can be up to 39 feet long.
CLT by Stora Enso is made of at least three single-layer panels that are bonded together with high-strength adhesive at a right angle. Each layer consists of a set of strength-graded boards that are finger-jointed and bonded together edge to edge. When these layers are bonded and pressed together, they form CLT panels that can be up to 39 feet long.
Application.
Application.
Application.
Application.
Structural elements for floors, roofs, and walls.
Structural elements for floors, roofs, and walls.
Structural elements for floors, roofs, and walls.
Maximum CLT
panel dimensions
Maximum CLT
panel dimensions
Maximum CLT
panel dimensions
Maximum CLT
panel dimensions
Length: 39' - 0"
Width: 7' - 4 9/16" (2.25 m)
Thickness: 1' - 5/8" (320 mm)
The above dimensions ensure panels will fit into a standard 40’ shipping container. Please contact us if you’d like to discuss sourcing larger panels.
Length: 39' - 0"
Width: 7' - 4 9/16" (2.25 m)
Thickness: 1' - 5/8" (320 mm)
The above dimensions ensure panels will fit into a standard 40’ shipping container. Please contact us if you’d like to discuss sourcing larger panels.
Length: 39' - 0"
Width: 7' - 4 9/16" (2.25 m)
Thickness: 1' - 5/8" (320 mm)
The above dimensions ensure panels will fit into a standard 40’ shipping container. Please contact us if you’d like to discuss sourcing larger panels.
Wood species
Wood species
Wood species
Wood species
European spruce (Picea abies).
Pine, fir, larch and other wood species available on request.
European spruce (Picea abies).
Pine, fir, larch and other wood species available on request.
European spruce (Picea abies).
Pine, fir, larch and other wood species available on request.
European spruce (Picea abies).
Pine, fir, larch and other wood species available on request.
Moisture content.
Moisture content.
Moisture content.
Moisture content.
12% ± 2% on delivery.
12% ± 2% on delivery.
12% ± 2% on delivery.
Adhesive.
Adhesive.
Adhesive.
Adhesive.
Formaldehyde-free polyurethane adhesive for finger jointing and surface bonding, approved for load-bearing and non-load-bearing components indoors and outdoors conforming to ANSI/APA PRG 320; Formaldehyde-free EPI adhesive for narrow side bonding.
Formaldehyde-free polyurethane adhesive for finger jointing and surface bonding, approved for load-bearing and non-load-bearing components indoors and outdoors conforming to ANSI/APA PRG 320; Formaldehyde-free EPI adhesive for narrow side bonding.
Formaldehyde-free polyurethane adhesive for finger jointing and surface bonding, approved for load-bearing and non-load-bearing components indoors and outdoors conforming to ANSI/APA PRG 320; Formaldehyde-free EPI adhesive for narrow side bonding.
Surface quality.
Surface quality.
Surface quality.
Surface quality.
Visual quality, industrial-visual quality, and non-visual quality.
Surfaces are always sanded on both panel faces. Read more in our article on Visual Considerations.
Visual quality, industrial-visual quality, and non-visual quality.
Surfaces are always sanded on both panel faces. Read more in our article on Visual Considerations.
Visual quality, industrial-visual quality, and non-visual quality.
Surfaces are always sanded on both panel faces. Read more in our article on Visual Considerations.
Weight.
Weight.
Weight.
Weight.
30 lbs/ft³ (470 kg/m³) for structural analysis.
For determining transport weight: approx. 32 lbs/ft³ (500 kg/m3).
30 lbs/ft³ (470 kg/m³) for structural analysis.
For determining transport weight: approx. 32 lbs/ft³ (500 kg/m3).
30 lbs/ft³ (470 kg/m³) for structural analysis.
For determining transport weight: approx. 32 lbs/ft³ (500 kg/m3).
Thermal conductivity.
Thermal conductivity.
Thermal conductivity.
Thermal conductivity.
0.07 BTU/(h·ft·°F) [0.12 W/(m.K)]
0.07 BTU/(h·ft·°F) [0.12 W/(m.K)]
0.07 BTU/(h·ft·°F) [0.12 W/(m.K)]
Dimensional stability.
Dimensional stability.
Dimensional stability.
Dimensional stability.
Direction: % of shrinkage or swelling per % moisture change.
Grain direction: ± 0.02-0.04
Cross-grain direction: ± 0.24
Direction: % of shrinkage or swelling per % moisture change.
Grain direction: ± 0.02-0.04
Cross-grain direction: ± 0.24
Direction: % of shrinkage or swelling per % moisture change.
Grain direction: ± 0.02-0.04
Cross-grain direction: ± 0.24
CLT design values.
CLT design values.
CLT design values.
CLT design values.
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Looks like you're viewing this on a pretty small screen. Our design value tables contain a lot of information and are better viewed on a desktop. Please visit us again from a larger screen (or resize your browser window) to view our CLT design value tables.
Looks like you're viewing this on a pretty small screen. Our design value tables contain a lot of information and are better viewed on a desktop. Please visit us again from a larger screen (or resize your browser window) to view our CLT design value tables.
Major-strength direction.
Major-strength direction.
Layup ID
Layup ID
Panel thickness (inches)
Panel thickness (inches)
Eleff,0
(10^6lbf-in^2 /ft)
GAeff,0
(10^6lbf /ft)
FbSeff,0
(lbf-ft /ft)
Vs,0
(lbf /ft)
60 L3s
2 3/8"
19.1
0.3
953
850
80 L3s
3 1/8"
41.2
0.4
1,544
1,134
90 L3s
3 9/16"
64.3
0.5
2,144
1,276
100 L3s
3 15/16"
85.9
0.5
2,575
1.417
120 L3s
4 3/4"
153
0.6
3,811
1,701
100 L5s
3 15/16"
73.1
0.6
2,193
1,417
120 L5s
4 3/4"
140
0.8
3,493
1,701
140 L5s
5 1/2"
233
1.0
4,986
1,984
160 L5s
6 5/16"
335
1.3
6,284
2,268
160 L5s-2*
6 5/16"
369
1.0
6,921
2,268
180 L5s
7 1/16"
451
1.3
7,513
2,551
200 L5s
7 7/8"
585
1.3
8,772
2,835
180 L7s
7 1/16"
426
1.4
7,089
2,551
200 L7s
7 7/8"
409
1.1
6,140
2,835
220 L7s-2*
8 11/16"
892
1.6
12,156
3,118
240 L7s
9 7/16"
832
1.5
10,397
3,402
240 L7s-2*
9 7/16"
1,226
2.2
15,315
3,402
260 L7s-2*
10 1/4"
1,526
2.0
17,600
3,685
280 L7s-2*
11"
1,862
1.9
19,942
3,969
300 L8s-2**
11 13/16"
2,274
2.8
22,729
4,252
320 L8s-2**
12 5/8"
2,682
2.7
25,135
4,535
Minor-strength direction.
Minor-strength direction.
Layup ID
Layup ID
Panel thickness (inches)
Panel thickness (inches)
Eleff,90
(10^6lbf-in^2 /ft)
GAeff,90
(10^6lbf /ft)
FbSeff,90
(lbf-ft /ft)
Vs,90
(lbf /ft)
60 L3s
2 3/8"
0.7
0.3
129
283
80 L3s
3 1/8"
5.9
0.7
517
567
90 L3s
3 9/16"
2.5
0.5
291
425
100 L3s
3 15/16"
5.9
0.6
517
567
120 L3s
4 3/4"
5.9
0.6
517
567
100 L5s
3 15/16"
19.1
0.6
1,121
850
120 L5s
4 3/4"
19.1
0.7
1,121
850
140 L5s
5 1/2"
19.1
0.7
1,121
850
160 L5s
6 5/16"
41.2
0.8
1,817
1,134
160 L5s-2*
6 5/16"
5.9
0.7
517
567
180 L5s
7 1/16"
85.9
1.0
3,029
1,417
200 L5s
7 7/8"
153
1.3
4,484
1,701
180 L7s
7 1/16"
114
1.0
3,339
1,701
200 L7s
7 7/8"
335
2.0
7,393
2,268
220 L7s-2*
8 11/16"
85.9
1.1
3,029
1,417
240 L7s
9 7/16"
451
1.9
8,839
2,551
240 L7s-2*
9 7/16"
41.2
0.9
1,817
1,134
260 L7s-2*
10 1/4"
85.9
1.1
3,029
1,417
280 L7s-2*
11"
153
1.4
4,484
1,701
300 L8s-2**
11 13/16"
206
1.3
5,188
1,984
320 L8s-2**
12 5/8"
330
1.5
7,268
2,268
Fire performance.
Fire performance.
Layup ID
Layup ID
Panel thickness (inches)
Panel thickness (inches)
60 min
M0, 60 min
(lbf-ft /ft)
60 min
M0, 60 min
(lbf-ft /ft)
60 min
V0, 60 min
(lbf-ft /ft)
60 min
V0, 60 min
(lbf-ft /ft)
90 min
M0, 90 min
(lbf-ft /ft)
90 min
M0, 90 min
(lbf-ft /ft)
90 min
V0, 90 min
(lbf-ft /ft)
90 min
V0, 90 min
(lbf-ft /ft)
120 min
M0, 120 min
(lbf-ft /ft)
120 min
M0, 120 min
(lbf-ft /ft)
120 min
V0, 120 min
(lbf-ft /ft)
120 min
V0, 120 min
(lbf-ft /ft)
60 L3s
2 3/8"
21.7
205
0
0
0
0
80 L3s
3 1/8"
313
780
56.9
332
0
0
90 L3s
3 9/16"
704
1,169
225
661
0
0
100 L3s
3 15/16"
704
1,169
597
1,077
12.5
156
120 L3s
4 3/4"
1,252
1,559
1,252
1,559
639
1,114
100 L5s
3 15/16"
844
1,764
272
726
0
0
120 L5s
4 3/4"
3,297
2,688
704
1,169
214
645
140 L5s
5 1/2"
4,260
3,118
2,223
2,674
1,252
1,559
160 L5s
6 5/16"
7,760
3,898
5,768
3,454
1,109
2,439
160 L5s-2*
6 5/16"
4,153
4,247
2,816
2,339
2,816
2,339
180 L5s
7 1/16"
9,273
4,287
8,989
4,234
3,742
3,274
200 L5s
7 7/8"
10,847
4,677
10,847
4,677
8,089
4,232
180 L7s
7 1/16"
11,052
5,026
4,864
4,004
4,864
3,101
200 L7s
7 7/8"
9,790
5,457
5,557
5,009
4,381
3,118
220 L7s-2*
8 11/16"
12,545
6,585
12,213
5,067
10,002
4,739
240 L7s
9 7/16"
16,607
6,626
15,682
6,534
5,835
5,612
240 L7s-2*
9 7/16"
24,930
7,572
14,531
6,572
13,995
5,457
260 L7s-2*
10 1/4"
28,250
8,352
15,614
7,352
15,489
5,846
280 L7s-2*
11"
31,635
9,131
17,041
8,131
17,041
6,236
300 L8s-2**
11 13/16"
39,979
9,911
28,129
8,911
28,129
7,406
320 L8s-2**
12 5/8"
43,614
10,690
31,040
9,690
31,040
7,795
Support is always included.
Support is always included.
Support is always included.
Support is always included.
Basic design support is always included in our mass timber supply packages. We also offer early-stage conceptual test fits for a flat-fee, which is best suited for project teams looking for rough order of magnitude pricing to inform building strategy.
Read more about our design-support packages.
Basic design support is always included in our mass timber supply packages. We also offer early-stage conceptual test fits for a flat-fee, which is best suited for project teams looking for rough order of magnitude pricing to inform building strategy.
Read more about our design-support packages.
Basic design support is always included in our mass timber supply packages. We also offer early-stage conceptual test fits for a flat-fee, which is best suited for project teams looking for rough order of magnitude pricing to inform building strategy.
Read more about our design-support packages.
© Fort Point Timber Inc.
build@fortpointtimber.com
75 Federal St Ste 1300
Boston, MA 02110
© Fort Point Timber Inc.
build@fortpointtimber.com
75 Federal St Ste 1300
Boston, MA 02110
© Fort Point Timber Inc.
build@fortpointtimber.com
75 Federal St Ste 1300
Boston, MA 02110
© Fort Point Timber Inc.
build@fortpointtimber.com
75 Federal St Ste 1300
Boston, MA 02110