Rosboro Treated Glulam Guide

■
24F 1.8E Treated Glulam.
Resistant to rot and decay.
Available in sizes consistent
with engineered wood systems.
■
■
Balanced layup and zero
camber so there is no top
or bottom.
■
Treated Glulam Beams and Columns You Can Trust
As the leading producer of glulam products in the U.S.,
Rosboro continues to respond to demand by producing
Treated Glulam Beams and Columns. These beams and
columns are made from Southern Pine and then treated to
resist rot, decay and insect attack or other conditions that
can destroy wood. Installation is easy because the beams
and columns are straight and manufactured to match standard framing widths and depths. Backed with a 25-year
warranty, Rosboro Treated Glulam products are a solid
choice for decks, porches and balconies.
Beams Treated with Hi-Clear II
Rosboro Treated Glulam Beams are pressure treated with
Hi-Clear II, a clear industrial wood preservative that provides chemical resistance against insect attack, decay,
mold, mildew, bacterial growths and is also effective
against the Formosan termite. Hi-Clear II is intended to
be used in above ground exterior applications. The treatment is clean, non-swelling and non-leaching and leaves
2
the beam a light honey color. The 24F 1.8E Beam is made
in a balanced lay-up, meaning there is no top or bottom
making installation clean and simple. For more information
on Hi-Clear II, please visit the Rosboro website at
www.rosboro.com.
Beams Are Available in Common Sizes
Lengths: Up to 48 feet
Widths: 3 1/2" and 5 7/16"
Depths: 9 1/2", 11 7/8", 14", 16" and 18"
Columns Approved for Ground Contact
Rosboro Treated Glulam Columns are pressure treated with
a mineral-spirit born copper naphthenate preservative that
provides an ideal fungicide and insecticide for the longterm preservation of glulam columns in both ground contact and above ground uses. The treatment is effective
against the dampwood termite, drywood termite and
subterranean termites including the Formosan termite.
Rosboro recommends that columns be placed on a pier
block, but if the column is used in a direct ground contact
application, then it should sit in a gravel bed that allows
proper drainage. The more aggressive copper naphthenate
is intended for exterior applications and has a color range
between chocolate-brown and dark green. For more information, please visit the Rosboro website at
www.rosboro.com.
Rosboro Treated Glulam Guide - February 2011
Columns Are Available in Common Sizes:
Lengths: Up to 48 feet
Widths: 3 3/8", 5 1/4" and 7"
Depths: 3 1/2", 5 1/2" and 7"
Appearance Classification
Rosboro Treated Glulam Beams are sized to match standard framing widths. The beams and columns are manufactured to Framing Appearance standards that allow
wane, glue squeeze and many other visual imperfections.
Rosboro limits wane and lightly sands the beams and
columns to remove excess glue and reduce blemishes
associated with the Framing Appearance classification.
These enhancements, give Rosboro treated products the
advantage of full framing width and an appearance that is
acceptable for the intended use.
The technical measure of wet-use is accepted as consistent moisture content within the beam of 16% or greater.
A wet-use condition is rarely reached unless the beam is
submerged in water or subjected to an artificially humid
moisture condition. For example, using the chart below, a
beam in an environment having a constant relative humidity of 80% and a temperature above 70° F will not reach a
consistent moisture content of 16% or greater. Since a
combination of high relative humidity and temperature
outside of this range is seldom reached in the U.S., ambient air conditions rarely result in a wet-use classification.
If there is any question regarding use condition, a licensed
design professional should be retained to determine if
wet-use design adjustments apply.
Restricted Uses
Although Rosboro Treated Glulam Beams and
Columns are pressure treated, they should not
be used in marine applications such as docks
and marinas and in conditions where the product is in
contact with standing water.
Recommended Hardware, Resealing and Finishing
Moisture can accumulate around connections, such as
hangers, fasteners bolts, nails and screws. Treated Glulam
provides protection from moisture induced rot and decay
at these locations. Field fabrication, trimming, holedrilling or minor surface damage, should be sealed with
copper naphthenate, which is available at local home
centers. Rosboro has specifically selected treatments that
are known to be non-corrosive to metal, however, we recommend the use of hangers and fasteners specified for
treated wood products such as hot-dip galvanized or
stainless steel. Oil-based stains and paints can be applied
as a final finish.
Understanding Wet-Use vs. Dry-Use
Wet-use and dry-use are terms that are associated with inservice conditions. Usually a glulam member is exposed
to water on an intermittent basis only. Any wetting is typically followed by a drying cycle, and the product never
reaches a consistent wet-use condition. This situation is
classified as dry-use.
To retain an open-air moisture content of at least 16% (wet-use
application), a beam must stay in a constant wet environment for a
prolonged period (as illustrated above).
Easy and Safe to Work With
Treated Glulam Beams and Columns not only resist rot
and decay, but with simple precautions, the products are
safe and easy to work with. The treatment used for
Rosboro Treated Glulam is low in toxicity to humans.
However, gloves should be worn when handling treated
products and dust masks and eye protection should be
worn when cutting treated material. Always follow site,
handling and disposal instructions provided by Materials
Safety Data Sheets (MSDS) available from the Rosboro
website (www.rosboro.com).
Code Recognized
Rosboro glulam is manufactured in accordance with
ANSI Standard A190.1-02, which is a code-recognized
national consensus standard for glulam, using wet-use
adhesives complying with ASTM Standard D2559.
The lay-up combinations EWS 24F-V5M1/SP and
Combination Number 50 are recognized under ICC-ES
Report ESR-1940. Rosboro's glulam production is
inspected and certified by APA-EWS.
Rosboro Treated Glulam Guide - February 2011
3
Rosboro Glulam Beams: Design Values1
Product
Layup Combination
Tension Zone
Compression Zone
Compression
Perpendicular to
Grain (psi) Fc
BigBeam
Stock Glulam
Treated Glulam
30F-E2M3
24F-V4/DF
24F-V5M1/SP
3,000
2,400
2,400
0.80
3,000
1,850
2,400
0.80
650
650
740
0.53
Flexural Stress Fb (psi)2
Wet-Use factor
T
Shear
Fv (psi)3
300
265
300
0.875
MOE (106 psi)
Apparent
True
2.1
1.8
1.8
2.2
1.9
1.9
0.833
(1) The tabulated values are for dry conditions of use (moisture content of less than 16%). For Wet-Use, the design values shall be multiplied by the Wet-Use factor given at the bottom of the table.
(2) Fb shall be adjusted by the volume effect factor using the following formula:
Cv = (5.125/b)1/x x (12/d)1/x x (21/L)1/x ≤ 1.0
where: b = beam width (in.),
d = beam depth (in.),
L = beam length (ft.), and
x = 10 for BigBeam, Stock Glulam, and x = 20 for Treated Glulam
(3) For non-prismatic members, notched members, members subject to impact or cyclic loading, or shear design of bending members at connections (NDS-05, 3.4.3.3), the design shear (Fv) shall be multiplied by a factor of 0.72.
Minimum Bearing Length (in.)
Product
Width (in.) 3,000
Treated Glulam - Dry-Use
1.50
3 1/2
(Fc = 740 psi)
1.50
5 7/16
Treated Glulam - Wet-Use
2.19
3 1/2
(Fc = 392 psi)
1.50
5 7/16
T
T
4,000
1.54
1.50
2.92
1.88
5,000
1.93
1.50
3.64
2.35
6,000
2.32
1.50
4.37
2.81
7,000
2.70
1.74
5.10
3.28
8,000
3.09
1.99
5.83
3.75
Reaction (lbf)
9,000 10,000 12,000 14,000 16,000 18,000 20,000 22,000 24,000 26,000
3.47
3.86
4.63
5.41
6.18
6.95
7.72
8.49
9.27 10.04
2.24
2.49
2.98
3.48
3.98
4.47
4.97
5.47
5.96
6.46
6.56
7.29
8.75
10.20 11.66 13.12 14.58 16.03 17.49 18.95
4.22
4.69
5.63
6.57
7.51
8.44
9.38 10.32 11.26 12.20
28,000
10.81
6.96
20.41
13.14
30,000
11.58
7.46
21.87
14.07
(1) Minimum bearing length is 1 1/2".
(2) Bearing across full width of the beam is required.
(3) Bearing length shall be adjusted when the allowable bearing stress of the supporting member is less than the tabulated Fc values of the glulam beam.
T
Treated
Glulam
Design
Properties
EWS 24F-V5M1/SP
Dry-Use
Fb = 2,400 psi
Fv = 300 psi
E = 1.8 x 106 psi
Fc = 740 psi
T
4
Width (in.)
3 1/2
5 7/16
Depth (in.)
9 1/2
11 7/8
14
16
18
9 1/2
11 7/8
14
16
18
Weight
(lbf/ft.)
9.5
11.8
14.0
15.9
17.9
14.7
18.4
21.7
24.8
27.9
Maximum Resistive Shear (lbf)
100%
115%
125%
6,650
7,648
8,313
8,313
9,559
10,391
9,800
11,270
12,250
11,200
12,880
14,000
12,600
14,490
15,750
10,331
11,881
12,914
12,914
14,851
16,143
15,225
17,509
19,031
17,400
20,010
21,750
19,575
22,511
24,469
Maximum Resistive Moment (ft.-lbf)
100%
115%
125%
10,529
12,109
13,161
16,452
18,920
20,565
22,867
26,297
28,583
29,867
34,347
37,333
37,800
43,470
47,250
16,358
18,811
20,447
25,559
29,393
31,949
35,525
40,854
44,406
46,400
53,360
58,000
58,725
67,534
73,406
EI
(106 in.2 - lb)
450
878
1,440
2,151
3,062
698
1,366
2,237
3,341
4,757
(1) Beam weight is assumed to be 41 pcf.
(2) Maximum resistive moment shall be adjusted by the volume factor based on NDS-05.
Rosboro Treated Glulam Guide - February 2011
Treated Glulam
Allowable Roof
Non-Snow
Loads (plf)
EWS 24F-V5M1/SP
Dry-Use
Fb = 2,400 psi
Fv = 300 psi
E = 1.8 x 106 psi
Fc = 740 psi
(LDF = 1.25)
Width (in.)
Depth (in.)
9 1/2
11 7/8
3 1/2
T
14
16
18
9 1/2
11 7/8
5 7/16
14
16
18
Treated Glulam
Allowable Roof
Snow Loads (plf)
EWS 24F-V5M1/SP
Dry-Use
Fb = 2,400 psi
Fv = 300 psi
E = 1.8 x 106 psi
Fc = 740 psi
(LDF = 1.15)
9 1/2
11 7/8
3 1/2
14
16
T
18
9 1/2
11 7/8
5 7/16
14
16
18
Span (feet)
Load Condition
Total Load
Live Load
Min. End/Int. Bearing (in.)
Total Load
Live Load
Min. End/Int. Bearing (in.)
Total Load
Live Load
Min. End/Int. Bearing (in.)
Total Load
Live Load
Min. End/Int. Bearing (in.)
Total Load
Live Load
Min. End/Int. Bearing (in.)
Total Load
Live Load
Min. End/Int. Bearing (in)
Total Load
Live Load
Min. End/Int. Bearing (in.)
Total Load
Live Load
Min. End/Int. Bearing (in.)
Total Load
Live Load
Min. End/Int. Bearing (in.)
Total Load
Live Load
Min. End/Int. Bearing (in.)
8'
1,636
–
2.5/6.4
2,559
–
4.0/9.9
3,182
–
4.9/12.3
3,802
–
5.9/14.7
4,482
–
6.9/17.4
2,541
–
2.5/6.4
3,975
–
4.0/9.9
4,943
–
4.9/12.3
5,907
–
5.9/14.7
6,963
–
6.9/17.4
10'
1,043
1,000
2.0/5.1
1,633
–
3.2/7.9
2,273
–
4.4/11.0
2,832
–
5.5/13.7
3,298
–
6.4/16.0
1,621
1,554
2.0/5.1
2,538
–
3.2/7.9
3,531
–
4.4/11.0
4,399
–
5.5/13.7
5,123
–
6.4/16.0
12'
652
579
1.5/3.8
1,131
–
2.6/6.6
1,574
–
3.7/9.2
2,058
–
4.8/12.0
2,607
–
6.1/15.2
1,013
899
1.5/3.8
1,757
1,756
2.6/6.6
2,445
–
3.7/9.2
3,197
–
4.8/12.0
4,050
–
6.1/15.2
14'
16'
407
270
365
244
1.5/3.5 1.5/3.5
802
533
712
477
2.2/5.5 1.7/4.2
1,153
879
–
782
3.2/7.9 2.8/6.9
1,508
1,151
–
–
4.1/10.3 3.6/9.0
1,911
1,459
–
–
5.2/13.0 4.6/11.4
633
419
566
379
1.5/3.5 1.5/3.5
1,246
828
1,106
741
2.2/5.5 1.7/4.2
1,791
1,366
–
1,214
3.2/7.9 2.8/6.9
2,343
1,781
–
–
4.1/10.3 3.6/9.0
2,959
2,244
–
–
5.2/13.0 4.5/11.3
18'
187
172
1.5/3.5
371
335
1.5/3.5
613
549
2.2/5.4
906
819
3.2/8.0
1,149
–
4.1/10.1
290
266
1.5/3.5
576
520
1.5/3.5
953
853
2.2/5.4
1,394
1,273
3.2/7.9
1,757
4.0/10.0
20'
133
125
1.5/3.5
267
244
1.5/3.5
443
400
1.8/4.4
667
597
2.6/6.6
927
851
3.6/9.1
207
194
1.5/3.5
415
379
1.5/3.5
689
622
1.8/4.4
1,036
928
2.6/6.6
1,410
1,321
3.6/8.9
24'
73
72
1.5/3.5
150
141
1.5/3.5
251
232
1.5/3.5
379
346
1.8/4.6
545
492
2.6/6.5
114
112
1.5/3.5
233
220
1.5/3.5
389
360
1.5/3.5
589
537
1.8/4.6
846
765
2.6/6.5
28'
NA
NA
NA
90
89
1.5/3.5
153
146
1.5/3.5
233
218
1.5/3.5
336
310
1.9/4.8
66
–
1.5/3.5
140
138
1.5/3.5
237
227
1.5/3.5
362
338
1.5/3.5
522
482
1.9/4.8
32'
NA
NA
NA
56
–
1.5/3.5
98
–
1.5/3.5
151
146
1.5/3.5
219
208
1.5/3.7
NA
NA
NA
87
–
1.5/3.5
152
–
1.5/3.5
234
227
1.5/3.5
341
323
1.5/3.7
Total Load
Live Load
Min. End/Int. Bearing (in.)
Total Load
Live Load
Min. End/Int. Bearing (in.)
Total Load
Live Load
Min. End/Int. Bearing (in.)
Total Load
Live Load
Min. End/Int. Bearing (in.)
Total Load
Live Load
Min. End/Int. Bearing (in.)
Total Load
Live Load
Min. End/Int. Bearing (in.)
Total Load
Live Load
Min. End/Int. Bearing (in.)
Total Load
Live Load
Min. End/Int. Bearing (in.)
Total Load
Live Load
Min. End/Int. Bearing (in.)
Total Load
Live Load
Min. End/Int. Bearing (in.)
1,504
–
2.3/5.8
2,353
–
3.7/9.1
2,926
–
4.5/11.4
3,497
–
5.4/13.6
4,122
–
6.4/16.0
2,337
–
2.3/5.8
3,656
–
3.7/9.1
4,546
–
4.5/11.4
5,433
–
5.4/13.6
6,404
–
6.4/16.0
959
–
1.9/4.7
1,502
–
2.9/7.3
2,090
–
4.1/10.2
2,604
–
5.1/12.6
3,033
–
5.9/14.7
1,490
–
1.9/4.7
2,333
–
2.9/7.3
3,247
–
4.1/10.2
4,045
–
5.1/12.6
4,711
–
5.9/14.7
652
407
270
579
365
244
1.5/3.8 1.5/3.5 1.5/3.5
1,039
760
533
–
712
477
2.4/6.1 2.1/5.2 1.7/4.2
1,447
1,059
808
–
–
782
3.4/8.5 2.9/7.3 2.5/6.3
1,892
1,386
1,057
–
–
–
4.4/11.1 3.8/9.5 3.3/8.3
2,397
1,756
1,341
–
–
–
5.6/14.0 4.8/12.0 4.2/10.5
1,013
633
419
899
566
379
1.5/3.8 1.5/3.5 1.5/3.5
1,615
1,181
828
–
1,106
741
2.4/6.1 2.1/5.2 1.7/4.2
2,248
1,646
1,255
–
–
1,214
3.4/8.5 2.9/7.3 2.5/6.3
2,940
2,153
1,636
–
–
–
4.4/11.1 3.8/9.5 3.3/8.3
3,724
2,720
2,062
–
–
–
5.6/14.0 4.8/12.0 4.2/10.4
187
172
1.5/3.5
371
335
1.5/3.5
613
549
2.2/5.4
832
819
2.9/7.4
1,055
–
3.7/9.3
290
266
1.5/3.5
576
520
1.5/3.5
953
853
2.2/5.4
1,280
1,273
2.9/7.3
1,614
–
3.7/9.2
133
125
1.5/3.5
267
244
1.5/3.5
443
400
1.8/4.4
667
597
2.6/6.6
851
–
3.4/8.4
207
194
1.5/3.5
415
379
1.5/3.5
689
622
1.8/4.4
1,027
928
2.6/6.5
1,295
–
3.3/8.2
73
72
1.5/3.5
150
141
1.5/3.5
251
232
1.5/3.5
379
346
1.8/4.6
545
492
2.6/6.5
114
112
1.5/3.5
233
220
1.5/3.5
389
360
1.5/3.5
589
537
1.8/4.6
846
765
2.6/6.5
NA
NA
NA
90
89
1.5/3.5
153
146
1.5/3.5
233
218
1.5/3.5
336
310
1.9/4.8
66
–
1.5/3.5
140
138
1.5/3.5
237
227
1.5/3.5
362
338
1.5/3.5
522
482
1.9/4.8
NA
NA
NA
56
–
1.5/3.5
98
–
1.5/3.5
151
146
1.5/3.5
219
208
1.5/3.7
NA
NA
NA
87
–
1.5/3.5
152
–
1.5/3.5
234
227
1.5/3.5
341
323
1.5/3.7
(1) This table is for preliminary design use only. Final design should include a complete analysis, including bearing stresses and lateral stability.
(2) Table is based on uniform loads (beam weight considered) and the more restrictive of simple or continuous span.
(3) Tabulated live load is based on the deflection criterion of span/240.
(4) Tabulated total load is based on the deflection criterion of span/180 and includes creep deflection with an assumed LL/DL ratio of 2 or higher.
(5) Tabulated total load is in addition to the beam weight (assumed 41 pcf).
(6) Selected beam size shall satisfy both live load and total load.
(7) For live load deflection limits of L/180 and L/360, multiply live load values by 1.33 and 0.67 respectively. The resulting live load shall not exceed the total load shown.
Rosboro Treated Glulam Guide - February 2011
5
Treated Glulam
Allowable
Floor
Loads (plf)
EWS 24F-V5M1/SP
Dry-Use
Fb = 2,400 psi
Fv = 300 psi
E = 1.8 x 106 psi
Fc = 740 psi
(LDF = 1.0)
Width (in.)
Depth (in.)
9 1/2
11 7/8
3 1/2
T
14
16
18
9 1/2
11 7/8
5 7/16
14
16
18
Span (feet)
Load Condition
Total Load
Live Load
Min. End/Int. Bearing (in.)
Total Load
Live Load
Min. End/Int. Bearing (in.)
Total Load
Live Load
Min. End/Int. Bearing (in.)
Total Load
Live Load
Min. End/Int. Bearing (in.)
Total Load
Live Load
Min. End/Int. Bearing (in.)
Total Load
Live Load
Min. End/Int. Bearing (in.)
Total Load
Live Load
Min. End/Int. Bearing (in.)
Total Load
Live Load
Min. End/Int. Bearing (in.)
Total Load
Live Load
Min. End/Int. Bearing (in.)
Total Load
Live Load
Min. End/Int. Bearing (in.)
8'
1,307
1,302
2.0/5.1
2,045
–
3.2/7.9
2,543
–
3.9/9.9
3,039
–
4.7/11.8
3,582
–
5.6/13.9
2,030
2,023
2.0/5.1
3,177
–
3.2/7.9
3,950
–
3.9/9.9
4,721
–
4.7/11.8
5,565
–
5.6/13.9
10'
12'
14'
833
517
322
667
386
243
1.6/4.1 1.5/3.5 1.5/3.5
1,304
902
635
1,302
754
475
2.5/6.4 2.1/5.3 1.7/4.4
1,815
1,256
919
–
1,235
778
3.5/8.8 2.9/7.4 2.5/6.3
2,262
1,643
1,203
–
–
1,161
4.4/11.0 3.8/9.6 3.3/8.2
2,635
2,082
1,525
–
–
–
5.1/12.8 4.9/12.2 4.2/10.4
1,294
803
500
1,036
600
378
1.6/4.1 1.5/3.5 1.5/3.5
2,026
1,402
987
2,023
1,171
737
2.5/6.4 2.1/5.3 1.7/4.4
2,820
1,952
1,428
–
1,919
1,208
3.5/8.8 2.9/7.4 2.5/6.3
3,514
2,553
1,869
–
1,804
4.4/11.0 3.8/9.6 3.3/8.2
4,093
3,235
2,362
–
–
–
5.1/12.8 4.9/12.2 4.2/10.4
16'
213
163
1.5/3.5
422
318
1.5/3.5
697
521
2.2/5.5
917
778
2.9/7.2
1,163
1,107
3.6/9.1
330
253
1.5/3.5
655
494
1.5/3.5
1,082
809
2.2/5.5
1,420
1,208
2.9/7.2
1,790
1,720
3.6/9.0
18'
146
114
1.5/3.5
293
223
1.5/3.5
485
366
1.7/4.3
722
546
2.6/6.4
915
778
3.2/8.1
228
178
1.5/3.5
455
347
1.5/3.5
754
569
1.7/4.3
1,110
849
2.5/6.3
1,400
1,208
3.2/8.0
20'
104
83
1.5/3.5
210
163
1.5/3.5
350
267
1.5/3.5
527
398
2.1/5.2
738
567
2.9/7.3
162
129
1.5/3.5
327
253
1.5/3.5
543
414
1.5/3.5
819
619
2.1/5.2
1,122
881
2.9/7.1
24'
NA
NA
NA
117
94
1.5/3.5
197
154
1.5/3.5
298
230
1.5/3.6
430
328
2.1/5.2
87
75
1.5/3.5
181
146
1.5/3.5
305
240
1.5/3.5
463
358
1.5/3.6
667
510
2.1/5.2
28'
NA
NA
NA
69
59
1.5/3.5
119
97
1.5/3.5
182
145
1.5/3.5
264
207
1.5/3.8
NA
NA
NA
107
92
1.5/3.5
184
151
1.5/3.5
283
225
1.5/3.5
410
321
1.5/3.8
32'
NA
NA
NA
NA
NA
NA
75
65
1.5/3.5
117
97
1.5/3.5
171
138
1.5/3.5
NA
NA
NA
66
62
1.5/3.5
116
101
1.5/3.5
181
151
1.5/3.5
265
215
1.5/3.5
(1) This table is for preliminary design use only. Final design should include a complete analysis, including bearing stresses and lateral stability.
(2) Table is based on uniform loads (beam weight considered) and the more restrictive of simple or continuous span.
(3) Tabulated live load is based on the deflection criterion of span/360.
(4) Tabulated total load is based on the deflection criterion of span/240 and includes creep deflection with an assumed LL/DL ratio of 4 or higher.
(5) Tabulated total load is in addition to the beam weight (assumed 41 pcf).
(6) Selected beam size shall satisfy both live load and total load.
(7) For live load deflection limits of L/240 and L/480, multiply live load values by 1.5 and 0.75 respectively. The resulting live load shall not exceed the total load shown.
6
Rosboro Treated Glulam Guide - February 2011
Allowable Axial Loads (Pounds) for Combination No. 50 Glulam Columns – Dry-Use
Side loads are not permitted. End loads are limited to a maximum eccentricity of either 1/6 column width or depth, whichever is worse.
Effective
Effective
Column
Column
Length
Length
(ft.)
(ft.)
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
Lamination Net Width = 3 3/8 in.
Net Depth = 5 1/2 in. (4 lams)
Net Depth = 3 1/2 in. (3 lams)
Load Duration Factor
Load Duration Factor
1.00
1.15
1.25
1.00
1.15
1.25
6,220
6,500
6,660
10,270
10,660
10,880
5,280
5,490
5,610
8,620
8,910
9,070
4,530
4,680
4,770
7,330
7,540
7,670
3,920
4,030
4,100
6,300
6,460
6,550
3,410
3,500
3,550
5,460
5,590
5,670
2,990
3,060
3,100
4,780
4,880
4,940
2,640
2,700
2,730
4,220
4,300
4,350
Lamination Net Width = 5 1/4 in.
Net Depth = 5 1/2 in. (4 lams)
Net Depth = 7 in. (6 lams)
Load Duration Factor
Load Duration Factor
1.00
1.15
1.25
1.00
1.15
1.25
25,780
27,780
28,960
36,090
38,920
40,560
23,020
24,530
25,410
32,240
34,340
35,550
20,480
21,650
22,320
28,650
30,240
31,160
18,230
19,150
19,680
25,460
26,700
27,420
16,280
17,010
17,430
22,680
23,670
24,240
14,590
15,180
15,530
20,290
21,090
21,550
13,120
13,620
13,900
18,220
18,880
19,260
11,860
12,270
12,500
16,440
16,980
17,300
10,760
11,100
11,280
14,890
15,350
15,610
9,790
10,070
10,220
13,540
13,930
14,160
8,940
9,160
9,290
12,370
12,700
12,890
8,180
8,370
8,490
11,330
11,620
11,780
7,510
7,680
7,780
10,420
10,670
10,810
6,920
7,070
7,150
9,610
9,830
9,950
Lamination Net Width = 7 in.
Net Depth = 7 in. (6 lams)
Load Duration Factor
1.00
1.15
1.25
53,460
59,380
63,060
50,270
55,300
58,360
46,900
51,070
53,550
43,460
46,860
48,850
40,070
42,840
44,450
36,840
39,110
40,430
33,840
35,730
36,830
31,110
32,700
33,620
28,630
29,990
30,770
26,410
27,570
28,240
24,400
25,400
25,980
22,600
23,470
23,970
20,980
21,740
22,180
19,510
20,180
20,570
18,190
18,780
19,120
16,990
17,510
17,820
15,900
16,370
16,640
Allowable Axial Loads (Pounds) for Combination No. 50 Glulam Columns – Wet-Use
Side loads are not permitted. End loads are limited to a maximum eccentricity of either 1/6 column width or depth, whichever is worse.
Effective
Effective
Column
Column
Length
Length
(ft.)
(ft.)
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
Lamination Net Width = 3 3/8 in.
Net Depth = 5 1/2 in. (4 lams)
Net Depth = 3 1/2 in. (3 lams)
Load Duration Factor
Load Duration Factor
1.00
1.15
1.25
1.00
1.15
1.25
5,080
5,320
5,460
8,430
8,760
8,960
4,330
4,510
4,610
7,100
7,340
7,480
3,720
3,860
3,930
6,040
6,220
6,330
3,230
3,330
3,380
5,200
5,340
5,420
2,820
2,890
2,930
4,510
4,620
4,690
2,470
2,530
2,560
3,950
4,040
4,090
2,180
2,230
2,260
3,490
3,560
3,600
Lamination Net Width = 5 1/4 in.
Net Depth = 5 1/2 in. (4 lams)
Net Depth = 7 in. (6 lams)
Load Duration Factor
Load Duration Factor
1.00
1.15
1.25
1.00
1.15
1.25
20,650
22,380
23,400
28,810
31,250
32,690
18,610
19,920
20,670
25,990
27,830
28,890
16,660
17,660
18,240
23,270
24,660
25,450
14,890
15,670
16,130
20,780
21,850
22,470
13,330
13,960
14,320
18,570
19,420
19,910
11,970
12,480
12,770
16,650
17,330
17,730
10,790
11,200
11,440
14,980
15,540
15,860
9,760
10,110
10,310
13,530
14,000
14,260
8,860
9,150
9,320
12,270
12,660
12,880
8,080
8,310
8,440
11,170
11,500
11,690
7,380
7,570
7,680
10,210
10,490
10,650
6,760
6,920
7,020
9,360
9,600
9,740
6,210
6,350
6,440
8,610
8,820
8,940
5,720
5,850
5,920
7,940
8,130
8,230
Lamination Net Width = 7 in.
Net Depth = 7 in. (6 lams)
Load Duration Factor
1.00
1.15
1.25
41,890
46,720
49,750
39,670
43,860
46,430
37,300
40,840
42,960
34,820
37,750
39,470
32,310
34,710
36,100
29,870
31,830
32,970
27,550
29,170
30,110
25,390
26,760
27,550
23,430
24,580
25,250
21,640
22,630
23,200
20,030
20,880
21,370
18,570
19,310
19,740
17,250
17,900
18,270
16,060
16,630
16,960
14,980
15,490
15,770
14,000
14,450
14,710
13,110
13,510
13,740
Design property notes for both Dry-Use and Wet-Use service conditions
(1) This table is for preliminary design use only. Final design should include a complete analysis, including bearing capacity of the foundation supporting the column.
(2) The tabulated allowable loads apply only to one-piece glulam members made with all N1D14 Southern pine laminations (Combination 50) without special tension laminations.
(3) The tabulated allowable loads are based on simply axially loaded columns subjected to a maximum eccentricity of either 1/6 column width or 1/6 column depth, whichever is worse.
(4) For side loads, other eccentric end loads, or other combined axial and flexural loads, see NDS-05.
(5) The column is assumed to be unbraced, except at the column ends, and the effective column length is equal to the actual column length.
(6) Volume factor for Fbx is in accordance with NDS-05. Size factor for Fby is (12/d)1/9, where d is equal to the lamination width in inches.
(7) Dry-Use compression parallel to grain (Fc) = 2,300 psi for 4 or more lams, or 1,700 psi for 2 or 3 lams. For Wet-Use, compression parallel to grain (Fc) = 2,300 x 0.73 psi for 4 or more lams, or 1,700 x 0.73 psi for 2 or 3 lams.
(8) Dry-Use modulus of elasticity (E) = 1.9 x 10 6 psi. Wet-Use Modulus of elasticity (E) = 1.9 x 0.833 x 106 psi.
(9) Dry-Use flexural stress when loaded parallel to wide faces of lamination (Fby) = 2,300 psi for 4 or more lams, or 2,100 psi for 3 lams. Wet-Use flexural stress when loaded parallel to wide faces of lamination (Fby) = 2,300 x 0.8 psi for
4 or more lams, or 2,100 x 0.8 psi for 3 lams.
(10) Dry-Use flexural stress when loaded perpendicular to wide faces of lamination (Fbx) = 2,100 psi for 2 lams to 15 in. deep without special tension laminations. Wet-Use flexural stress when loaded perpendicular to wide faces of lamination
(Fbx) = 2,100 x 0.8 psi for 2 lams to 15 in. deep without special tension laminations.
Rosboro Treated Glulam Guide - February 2011
7
More Glulam Products From Rosboro
In addition to Treated Glulam, Rosboro manufacturers a full line
of laminated timber that fits any application.
Rosboro
TM
Next-Generation Glulam
X-Beam™: The industry’s first full-width stock glulam in
architectural appearance, the time- and money-saving X-Beam is
available in 4x and 6x I-Joist compatible and traditional glulam
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Software Support
As an alternative to using our printed tables to manually
calculate the proper beam for a given application, Rosboro has
collaborated with Keymark to develop the Rosboro KeyBeam™
design software that supports Rosboro's entire product line.
Visit our website to download a free copy of our KeyBeam
software.
Live Technical Support (1-877-457-4139)
Rosboro's technical support hotline is for those times when you
need our help. Whether you are an architect, engineer, contractor, building official or homeowner our technical support staff
is available with the answers when you need us.
Rosboro BigBeam®: The big daddy of our I-joist compatible
beams, the BigBeam (30F) is engineered to match standard
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Rosboro
Growing Today • Building Tomorrow®
Custom Glulam: Our industry-leading glulam is available in
custom sizes, curved shapes and in a variety of wood species
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of combining custom orders with other building materials.
PO Box 20, Springfield, OR 97477
Glulam Sales: 1-888-393-2304
Technical Support Hotline: 1-877-457-4139
E-mail: [email protected]
Web: www.rosboro.com
Rev. 02-11
TBSB-06p