Dimension lumber (2" to 4")

4x4

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

Dimensions

Depthd
3.5in
Widthb
3.5in

Mass and area

Cross-sectional areaA
12.25in²
Outside perimeterP
14in

Strong axis x–x

Moment of inertiaIx
12.51in⁴
Elastic section modulusSx
7.146in³
Plastic section modulusZx
10.72in³
Radius of gyrationrx
1.01in

Weak axis y–y

Moment of inertiaIy
12.51in⁴
Elastic section modulusSy
7.146in³
Plastic section modulusZy
10.72in³
Radius of gyrationry
1.01in

Torsion and stability

Torsional constantJ
21.13in⁴

Equivalents in other standards