Dimension lumber (2" to 4")

3x6

Standard: DOC PS 20 / NDS SupplementSource: Nominal → actual dry sizes (PS 20), calculated
xyb = 2.5d = 5.5
Cross-section, to scaledimensions in inches

Dimensions

Depthd
5.5in
Widthb
2.5in

Mass and area

Cross-sectional areaA
13.75in²
Outside perimeterP
16in

Strong axis x–x

Moment of inertiaIx
34.66in⁴
Elastic section modulusSx
12.6in³
Plastic section modulusZx
18.91in³
Radius of gyrationrx
1.588in

Weak axis y–y

Moment of inertiaIy
7.161in⁴
Elastic section modulusSy
5.729in³
Plastic section modulusZy
8.594in³
Radius of gyrationry
0.7217in

Torsion and stability

Torsional constantJ
20.47in⁴

Equivalents in other standards