Maximum Allowable
Fiberstress


Design Values for Visually Graded Timbers 5" X 5" and Larger
 See NDS 2.3 for a description of design value adjustment factors


Species/Grade Size Classification Max Fiberstress Modulus of Elasticity Max Shear
Balsam Fir
Select Structural 1350 PSI 1.4 Million PSI 125 PSI
No.1Beams and Stringers 1100 PSI 1.4 Million PSI 125 PSI
No.2 725 PSI 1.1 Million PSI 125 PSI
Select Structural 1250 PSI 1.4 Million PSI 125 PSI
No.1Posts and Timbers 1000 PSI 1.4 Million PSI 125 PSI
No.2 575 PSI 1.1 Million PSI 125 PSI
Beech-Birch-Hickory
Select Structural 1650 PSI 1.5 Million PSI 180 PSI
No.1Beams and Stringers 1400 PSI 1.5 Million PSI 180 PSI
No.2 900 PSI 1.2 Million PSI 180 PSI
Select Structural 1550 PSI 1.5 Million PSI 180 PSI
No.1Posts and Timbers 950 PSI 1.5 Million PSI 180 PSI
No.2 725 PSI 1.2 Million PSI 180 PSI
Coast Sitka Spruce
Select Structural 1150 PSI 1.5 Million PSI 115 PSI
No.1Beams and Stringers 950 PSI 1.5 Million PSI 115 PSI
No.2 625 PSI 1.2 Million PSI 115 PSI
Select Structural 1100 PSI 1.5 Million PSI 115 PSI
No.1Posts and Timbers 875 PSI 1.5 Million PSI 115 PSI
No.2 525 PSI 1.2 Million PSI 115 PSI
Douglas Fir-Larch
Dense Select StructuralBeams and Stringers 1850 PSI 1.7 Million PSI 170 PSI
Select Structural 1600 PSI 1.6 Million PSI 170 PSI
Dense No.1 1550 PSI 1.7 Million PSI 170 PSI
No.1 1350 PSI 1.6 Million PSI 170 PSI
Dense No.2 1000 PSI 1.4 Million PSI 170 PSI
No.2 875 PSI 1.3 Million PSI 170 PSI
Dense Select StructuralPosts and Timbers 1750 PSI 1.7 Million PSI 170 PSI
Select Structural 1500 PSI 1.6 Million PSI 170 PSI
Dense No.1 1400 PSI 1.7 Million PSI 170 PSI
No.1 1200 PSI 1.6 Million PSI 170 PSI
Dense No.2 800 PSI 1.4 Million PSI 170 PSI
No.2 700 PSI 1.3 Million PSI 180 PSI
Douglas Fir-Larch (North)
Select Structural 1600 PSI 1.6 Million PSI 170 PSI
No.1Beams and Stringers 1300 PSI 1.6 Million PSI 170 PSI
No.2 875 PSI 1.3 Million PSI 170 PSI
Select Structural 1500 PSI 1.6 Million PSI 170 PSI
No.1Posts and Timbers 1200 PSI 1.6 Million PSI 170 PSI
No.2 725 PSI 1.3 Million PSI 170 PSI
Douglas Fir-South
Select Structural 1550 PSI 1.2 Million PSI 165 PSI
No.1Beams and Stringers 1300 PSI 1.2 Million PSI 165 PSI
No.2 825 PSI 1.0 Million PSI 165 PSI
Select Structural 1400 PSI 1.2 Million PSI 165 PSI
No.1Posts and Timbers 1150 PSI 1.2 Million PSI 165 PSI
No.2 650 PSI 1.0 Million PSI 165 PSI
Eastern Hemlock
Select Structural 1350 PSI 1.2 Million PSI 155 PSI
No.1Beams and Stringers 1150 PSI 1.2 Million PSI 155 PSI
No.2 750 PSI .9 Million PSI 155 PSI
Select Structural 1250 PSI 1.2 Million PSI 155 PSI
No.1Posts and Timbers 1050 PSI 1.2 Million PSI 155 PSI
No.2 600 PSI .9 Million PSI 155 PSI
Eastern Hemlock-Tamarack
Select Structural 1400 PSI 1.2 Million PSI 155 PSI
No.1Beams and Stringers 1150 PSI 1.2 Million PSI 155 PSI
No.2 750 PSI .9 Million PSI 155 PSI
Select Structural 1300 PSI 1.2 Million PSI 155 PSI
No.1Posts and Timbers 1050 PSI 1.2 Million PSI 155 PSI
No.2 600 PSI 1.2 Million PSI 155 PSI
Eastern Spruce
Select Structural 1050 PSI 1.4 Million PSI 135 PSI
No.1Beams and Stringers 900 PSI 1.4 Million PSI 135 PSI
No.2 575 PSI 1.0 Million PSI 135 PSI
Select Structural 1000 PSI 1.4 Million PSI 135 PSI
No.1Posts and Timbers 800 PSI 1.4 Million PSI 135 PSI
No.2 575 PSI 1.0 Million PSI 135 PSI
Eastern White Pine
Select Structural 1050 PSI 1.1 Million PSI 125 PSI
No.1Beams and Stringers 875 PSI 1.1 Million PSI 125 PSI
No.2 575 PSI .9 Million PSI 125 PSI
Select Structural 975 PSI 1.1 Million PSI 125 PSI
No.1Posts and Timbers 800 PSI 1.1 Million PSI 125 PSI
No.2 450 PSI .9 Million PSI 125 PSI
Hem-Fir
Select Structural 12500 PSI 1.3 Million PSI 140 PSI
No.1Beams and Stringers 1000 PSI 1.3 Million PSI 140 PSI
No.2 675 PSI 1.1 Million PSI 140 PSI
Select Structural 1150 PSI 1.3 Million PSI 140 PSI
No.1Posts and Timbers 925 PSI 1.3 Million PSI 140 PSI
No.2 550 PSI 1.1 Million PSI 140 PSI
Mixed Maple
Select Structural 1150 PSI 1.1 Million PSI 180 PSI
No.1Beams and Stringers 975 PSI 1.1 Million PSI 180 PSI
No.2 625 PSI .9 Million PSI 180 PSI
Select Structural 1100 PSI 1.1 Million PSI 180 PSI
No.1Posts and Timbers 875 PSI 1.1 Million PSI 180 PSI
No.2 500 PSI .9 Million PSI 180 PSI
Mixed Oak
Select Structural 1350 PSI 1.0 Million PSI 155 PSI
No.1Beams and Stringers 1150 PSI 1.0 Million PSI 155 PSI
No.2 725 PSI .8 Million PSI 155 PSI
Select Structural 1250 PSI 1.0 Million PSI 155 PSI
No.1Posts and Timbers 1000 PSI 1.0 Million PSI 155 PSI
No.2 575 PSI .8 Million PSI 155 PSI
Mixed Southern Pine (wet service)
Select Structural 1500 PSI 1.3 Million PSI 165 PSI
No.15x5 and Larger 1350 PSI 1.3 Million PSI 165 PSI
No.2 850 PSI 1. 0Million PSI 165 PSI
Mountain Hemlock
Select Structural 1350 PSI 1.1 Million PSI 170 PSI
No.1Beams and Stringers 1100 PSI 1.1 Million PSI 170 PSI
No.2 725 PSI .9 Million PSI 170 PSI
Select Structural 1250 PSI 1.1 Million PSI 170 PSI
No.1Posts and Timbers 1000 PSI 1.1 Million PSI 170 PSI
No.2 625 PSI .9 Million PSI 170 PSI
Northern Pine
Select Structural 1250 PSI 1.3 Million PSI 135 PSI
No.1Beams and Stringers 1050 PSI 1.3 Million PSI 135 PSI
No.2 675 PSI 1.0 Million PSI 135 PSI
Select Structural 1150 PSI 1.3 Million PSI 135 PSI
No.1Posts and Timbers 950 PSI 1.3 Million PSI 135 PSI
No.2 550 PSI 1.0 Million PSI 135 PSI
Northern Red Oak
Select Structural 1600 PSI 1.3 Million PSI 205 PSI
No.1Beams and Stringers 1350 PSI 1.3 Million PSI 205 PSI
No.2 875 PSI 1.0 Million PSI 205 PSI
Select Structural 1500 PSI 1.3 Million PSI 205 PSI
No.1Posts and Timbers 1200 PSI 1.3 Million PSI 205 PSI
No.2 700 PSI 1.0 Million PSI 205 PSI
Northern White Cedar
Select Structural 900 PSI .7 Million PSI 115 PSI
No.1Beams and Stringers 750 PSI .7 Million PSI 115 PSI
No.2 500 PSI .6 Million PSI 115 PSI
Select Structural 850 PSI .7 Million PSI 115 PSI
No.1Posts and Timbers 675 PSI .7 Million PSI 115 PSI
No.2 400 PSI .6 Million PSI 115 PSI
Ponderosa Pine
Select Structural 1100 PSI 1.1 Million PSI 130 PSI
No.1Beams and Stringers 925 PSI 1.1 Million PSI 130 PSI
No.2 600 PSI .9 Million PSI 130 PSI
Select Structural 1000 PSI 1.1 Million PSI 130 PSI
No.1Posts and Timbers 825 PSI 1.1 Million PSI 130 PSI
No.2 475 PSI .9 Million PSI 130 PSI
Red Maple
Select Structural 1500 PSI 1.5 Million PSI 195 PSI
No.1Beams and Stringers 1250 PSI 1.5 Million PSI 195 PSI
No.2 800 PSI 1.2 Million PSI 195 PSI
Select Structural 1400 PSI 1.5 Million PSI 195 PSI
No.1Posts and Timbers 1150 PSI 1.5 Million PSI 195 PSI
No.2 650 PSI 1.2 Million PSI 195 PSI
Red Oak
Select Structural 1350 PSI 1.2 Million PSI 155 PSI
No.1Beams and Stringers 1150 PSI 1.2 Million PSI 155 PSI
No.2 725 PSI 1.0 Million PSI 155 PSI
Select Structural 1250 PSI 1.2 Million PSI 155 PSI
No.1Posts and Timbers 1000 PSI 1.2 Million PSI 155 PSI
No.2 575 PSI 1.0 Million PSI 155 PSI
Red Pine
Select Structural 1050 PSI 1.1 Million PSI 130 PSI
No.1Beams and Stringers 875 PSI 1.1 Million PSI 130 PSI
No.2 575 PSI .9 Million PSI 130 PSI
Select Structural 1000 PSI 1.1 Million PSI 130 PSI
No.1Posts and Timbers 800 PSI 1.1 Million PSI 130 PSI
No.2 475 PSI .9 Million PSI 130 PSI
Redwood
Clear Structural5X5 and Larger 1850 PSI 1.3 Million PSI 145 PSI
Select Structural 1400 PSI 1.3 Million PSI 145 PSI
No.1 1200 PSI 1.3 Million PSI 145 PSI
No.2 975 PSI 1.3 Million PSI 145 PSI
Sitka Spruce
Select Structural 1200 PSI 1.3 Million PSI 140 PSI
No.1Beams and Stringers 1000 PSI 1.3 Million PSI 140 PSI
No.2 650 PSI 1.0 Million PSI 140 PSI
Select Structural 1150 PSI 1.3 Million PSI 140 PSI
No.1Posts and Timbers 9250 PSI 1.3 Million PSI 140 PSI
No.2 550 PSI 1.0 Million PSI 140 PSI
Southern PineWet Service
Dense Select Structural5X5 and Larger 1750 PSI 1.6 Million PSI 165 PSI
Select Structural 1500 PSI 1.5 Million PSI 165 PSI
No.1 Dense 1550 PSI 1.6 Million PSI 165 PSI
No.1 1350 PSI 1.5 Million PSI 165 PSI
No.2 Dense 975 PSI 1.3 Million PSI 165 PSI
No.2 850 PSI 1.2 Million PSI 165 PSI
Spruce-Pine-Fir
Select Structural 1050 PSI 1.3 Million PSI 125 PSI
No.1Beams and Stringers 900 PSI 1.3 Million PSI 125 PSI
No.2 575 PSI 1.0 Million PSI 125 PSI
Select Structural 1000 PSI 1.3 Million PSI 125 PSI
No.1Posts and Timbers 800 PSI 1.3 Million PSI 125 PSI
No.2 350 PSI 1.0 Million PSI 125 PSI
Western Cedar
Select Structural 1150 PSI 1.0 Million PSI 140 PSI
No.1Beams and Stringers 975 PSI 1.0 Million PSI 140 PSI
No.2 625 PSI .8 Million PSI 140 PSI
Select Structural 1100 PSI 1.0 Million PSI 140 PSI
No.1Posts and Timbers 875 PSI 1.0 Million PSI 140 PSI
No.2 550 PSI .8 Million PSI 140 PSI
Western Hemlock
Select Structural 1400 PSI 1.4 Million PSI 135 PSI
No.1Beams and Stringers 1150 PSI 1.4 Million PSI 135 PSI
No.2 750 PSI 1.1 Million PSI 135 PSI
Select Structural 1300 PSI 1.4 Million PSI 135 PSI
No.1Posts and Timbers 1050 PSI 1.4 Million PSI 135 PSI
No.2 650 PSI 1.1 Million PSI 135 PSI
Western White Pine
Select Structural 1050 PSI 1.3 Million PSI 120 PSI
No.1Beams and Stringers 850 PSI 1.3 Million PSI 120 PSI
No.2 550 PSI 1.0 Million PSI 120 PSI
Select Structural 975 PSI 1.3 Million PSI 120 PSI
No.1Posts and Timbers 775 PSI 1.3 Million PSI 120 PSI
No.2 450 PSI 1.0 Million PSI 120 PSI
Western Woods
Select Structural 1050 PSI 1.1 Million PSI 125 PSI
No.1Beams and Stringers 900 PSI 1.1 Million PSI 125 PSI
No.2 575 PSI .9 Million PSI 125 PSI
Select Structural 1000 PSI 1.1 Million PSI 125 PSI
No.1Posts and Timbers 800 PSI 1.1 Million PSI 125 PSI
No.2 350 PSI .9 Million PSI 125 PSI
White Oak
Select Structural 1400 PSI 1.0 Million PSI 205 PSI
No.1Beams and Stringers 1200 PSI 1.0 Million PSI 205 PSI
No.2 750 PSI .8 Million PSI 205 PSI
Select Structural 1300 PSI 1.0 Million PSI 205 PSI
No.1Posts and Timbers 1050 PSI 1.0 Million PSI 205 PSI
No.2 600 PSI .8 Million PSI 205 PSI
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