Dimension lumber (2" to 4")

2x8

Standard: DOC PS 20 / NDS SupplementSource: Nominal → actual dry sizes (PS 20), calculated
xyb = 1.5d = 7.25
Cross-section, to scaledimensions in inches

Dimensions

Depthd
7.25in
Widthb
1.5in

Mass and area

Cross-sectional areaA
10.87in²
Outside perimeterP
17.5in

Strong axis x–x

Moment of inertiaIx
47.63in⁴
Elastic section modulusSx
13.14in³
Plastic section modulusZx
19.71in³
Radius of gyrationrx
2.093in

Weak axis y–y

Moment of inertiaIy
2.039in⁴
Elastic section modulusSy
2.719in³
Plastic section modulusZy
4.078in³
Radius of gyrationry
0.433in

Torsion and stability

Torsional constantJ
7.093in⁴

Equivalents in other standards