Timbers – 5" and larger

6x12

Standard: DOC PS 20 / NDS SupplementSource: Nominal − ½" (green), calculated
xyb = 5.5d = 11.5
Cross-section, to scaledimensions in inches

Dimensions

Depthd
11.5in
Widthb
5.5in

Mass and area

Cross-sectional areaA
63.25in²
Outside perimeterP
34in

Strong axis x–x

Moment of inertiaIx
697.1in⁴
Elastic section modulusSx
121.2in³
Plastic section modulusZx
181.8in³
Radius of gyrationrx
3.32in

Weak axis y–y

Moment of inertiaIy
159.4in⁴
Elastic section modulusSy
57.98in³
Plastic section modulusZy
86.97in³
Radius of gyrationry
1.588in

Torsion and stability

Torsional constantJ
446.4in⁴

Equivalents in other standards