Dimension lumber (2" to 4")

4x6

Standard: DOC PS 20 / NDS SupplementSource: Nominal → actual dry sizes (PS 20), calculated
xyb = 3.5d = 5.5
Cross-section, to scaledimensions in inches

Dimensions

Depthd
5.5in
Widthb
3.5in

Mass and area

Cross-sectional areaA
19.25in²
Outside perimeterP
18in

Strong axis x–x

Moment of inertiaIx
48.53in⁴
Elastic section modulusSx
17.65in³
Plastic section modulusZx
26.47in³
Radius of gyrationrx
1.588in

Weak axis y–y

Moment of inertiaIy
19.65in⁴
Elastic section modulusSy
11.23in³
Plastic section modulusZy
16.84in³
Radius of gyrationry
1.01in

Torsion and stability

Torsional constantJ
47.52in⁴

Equivalents in other standards