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Species
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Dimension lumber
Fc (psi) =
Emin (psi) =
Emin (psi)
Fc (psi)
Column size
Capacity (lb)
Douglas-Fir Larch
Doug Fir-Larch (North)
Doug Fir (South)
Hem-Fir
Hem-Fir (North)
Spruce-Pine-Fir
Spruce-Pine-Fir (South)
Southern Pine
Other (specify Fc and E)
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Grade
Select Structural
No. 1
No. 2
No. 3
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based on 2005 NDS
based on 2012 NDS
Duration of load factor, Cd
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1.00
0.90
1.15
1.25
1.60
2.00
Outdoors (wet service conditions)?
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Beams and stringers
No
Yes
Fc (psi) =
Emin (psi) =
Column size
Capacity (lb)
Unbraced height, KL (ft), x-axis
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Posts and timbers
Unbraced height, KL (ft), y-axis
Fc (psi) =
Emin (psi) =
Column size
Capacity (lb)
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Use nails with Kf = 0.6
Use bolts with Kf = 0.75
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2x4
2-2x4
3-2x4
2x6
2-2x6
3-2x6
2x8
2-2x8
3-2x8
2x10
2-2x10
3-2x10
2x12
2-2x12
3-2x12
4x4
4x6
4x8
4x10
4x12
6x10
6x12
8x12
6x6
6x8
8x8
8x10
10x10
10x12
12x12
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