Dimension lumber (2" to 4")

4x5

Standard: DOC PS 20 / NDS SupplementSource: Nominal → actual dry sizes (PS 20), calculated
xyb = 3.5d = 4.5
Cross-section, to scaledimensions in inches

Dimensions

Depthd
4.5in
Widthb
3.5in

Mass and area

Cross-sectional areaA
15.75in²
Outside perimeterP
16in

Strong axis x–x

Moment of inertiaIx
26.58in⁴
Elastic section modulusSx
11.81in³
Plastic section modulusZx
17.72in³
Radius of gyrationrx
1.299in

Weak axis y–y

Moment of inertiaIy
16.08in⁴
Elastic section modulusSy
9.187in³
Plastic section modulusZy
13.78in³
Radius of gyrationry
1.01in

Torsion and stability

Torsional constantJ
33.76in⁴

Equivalents in other standards