Dimension lumber (2" to 4")

4x12

Standard: DOC PS 20 / NDS SupplementSource: Nominal → actual dry sizes (PS 20), calculated
xyb = 3.5d = 11.25
Cross-section, to scaledimensions in inches

Dimensions

Depthd
11.25in
Widthb
3.5in

Mass and area

Cross-sectional areaA
39.38in²
Outside perimeterP
29.5in

Strong axis x–x

Moment of inertiaIx
415.3in⁴
Elastic section modulusSx
73.83in³
Plastic section modulusZx
110.7in³
Radius of gyrationrx
3.248in

Weak axis y–y

Moment of inertiaIy
40.2in⁴
Elastic section modulusSy
22.97in³
Plastic section modulusZy
34.45in³
Radius of gyrationry
1.01in

Torsion and stability

Torsional constantJ
129.3in⁴

Equivalents in other standards