ASD/LRFD Manual - American Wood Council

18 M4: SAWN LUMBER
Table M4.5-1a ASD Tension Member Capacity (T'), Structural Lumber 1,2
2-inch nominal thickness Visually Graded Lumber (1.5 inch dry dressed size), C D = 1.0.
4-inch nominal thickness Visually Graded Lumber (3.5 inch dry dressed size), C D = 1.0.
Tension Member Capacity, T' (lbs)
Visually Graded Lumber
Width 2" nominal thickness 4" nominal thickness
Nominal Actual Select Select
Species in. in. Structural No. 1 No. 2 No. 3 Structural No. 1 No. 2
4 3.5 7,870 5,310 4,520 2,550 18,300 12,400 10,500
6 5.5 10,700 7,230 6,160 3,480 25,000 16,800 14,300
Douglas Fir-Larch 8 7.25 13,000 8,000 7,500 4,240 30,400 20,500 17,500
10 9.25 15,260 10,300 8,770 4,960 35,600 24,000 20,400
12 11.25 16,800 11,900 9,700 5,480 39,300 26,500 22,600
4 3.5 7,280 4,920 4,130 2,360 16,900 11,400 9,640
6 5.5 9,900 6,700 5,630 3,210 23,100 15,600 13,100
Hem-Fir 8 7.25 12,000 8,150 6,850 3,910 28,100 19,000 15,900
10 9.25 14,100 9,530 8,010 4,570 32,900 22,200 18,600
12 11.25 15,600 10,500 8,850 5,060 36,400 24,600 20,600
4 3.5 8,400 5,510 4,330 2,490 19,600 12,800 10,100
6 5.5 11,500 7,420 5,980 3,500 26,900 17,300 13,900
Southern Pine 8 7.25 14,100 8,970 7,060 4,350 32,900 20,900 16,400
10 9.25 15,200 10,000 9,280 4,500 35,600 23,400 18,600
12 11.25 17,700 11,300 9,280 5,480 41,300 26,500 21,600
4 3.5 5,510 3,540 3,540 1,960 12,800 8,260 8,260
6 5.5 7,510 4,820 4,280 2,680 17,500 11,200 11,200
Spruce-Pine-Fir 8 7.25 9,130 5,870 5,870 3,260 21,300 13,700 13,700
10 9.25 10,600 6,860 6,860 3,810 24,900 16,000 16,000
12 11.25 11,800 7,590 7,590 4,210 27,500 17,700 17,700
2" nominal thickness 4" nominal thickness
Construction Standard Utility Stud Construction Standard Stud
Douglas Fir-Larch 4 3.5 3,410 1,960 919 2,590 7,960 4,590 6,060
Hem-Fir 4 3.5 3,150 1,700 788 2,310 7,350 3,980 5,390
Southern Pine 4 3.5 3,280 1,830 919 2,490 7,560 4,280 5,810
Spruce-Pine-Fir 4 3.5 2,620 1,440 656 2,020 6,120 3,360 4,710
Table M4.5-1b ASD Tension Member Capacity (T'), Structural Lumber 1,2
2-inch nominal thickness MSR Lumber (1.5 inch dry dressed size), C D = 1.0.
Width
Tension Member Capacity, T' (lbs)
Machine Stress Rated Lumber
Nominal Actual 2" nominal thickness
Species in. in. 1200f-1.2E 1350f-1.3E 1450f-1.3E 1650f-1.5E 2100f-1.8E 2250f-1.9E 2400f-2.0E
4 3.5 3,150 3,938 4,200 5,355 8,269 9,188 10,106
6 5.5 4,950 6,188 6,600 8,415 12,994 14,438 15,881
All Species 8 7.25 6,525 8,156 8,700 11,093 17,128 19,031 20,934
10 9.25 8,325 10,406 11,100 14,153 21,853 24,281 26,709
12 11.25 10,125 12,656 13,500 17,213 26,578 29,531 32,484
1. Multiply tabulated ASD capacity by 1.728 to obtain LRFD capacity (λ = 0.8). See NDS Appendix N for more information.
2. Tabulated values apply to members in a dry service condition, C M = 1.0; normal temperature range, C t = 1.0; and unincised members, C i = 1.0.
American Wood Council