Timbers – 5" and larger

12x12

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

Dimensions

Depthd
11.5in
Widthb
11.5in

Mass and area

Cross-sectional areaA
132.2in²
Outside perimeterP
46in

Strong axis x–x

Moment of inertiaIx
1,458in⁴
Elastic section modulusSx
253.5in³
Plastic section modulusZx
380.2in³
Radius of gyrationrx
3.32in

Weak axis y–y

Moment of inertiaIy
1,458in⁴
Elastic section modulusSy
253.5in³
Plastic section modulusZy
380.2in³
Radius of gyrationry
3.32in

Torsion and stability

Torsional constantJ
2,463in⁴

Equivalents in other standards