Dimension lumber (2" to 4")

2x4

Standard: DOC PS 20 / NDS SupplementSource: Nominal → actual dry sizes (PS 20), calculated
xyb = 1.5d = 3.5
Cross-section, to scaledimensions in inches

Dimensions

Depthd
3.5in
Widthb
1.5in

Mass and area

Cross-sectional areaA
5.25in²
Outside perimeterP
10in

Strong axis x–x

Moment of inertiaIx
5.359in⁴
Elastic section modulusSx
3.063in³
Plastic section modulusZx
4.594in³
Radius of gyrationrx
1.01in

Weak axis y–y

Moment of inertiaIy
0.9844in⁴
Elastic section modulusSy
1.312in³
Plastic section modulusZy
1.969in³
Radius of gyrationry
0.433in

Torsion and stability

Torsional constantJ
2.877in⁴

Equivalents in other standards