Timbers – 5" and larger

12x16

Standard: DOC PS 20 / NDS SupplementSource: Nominal − ½" (green), calculated
xyb = 11.5d = 15.5
Cross-section, to scaledimensions in inches

Dimensions

Depthd
15.5in
Widthb
11.5in

Mass and area

Cross-sectional areaA
178.3in²
Outside perimeterP
54in

Strong axis x–x

Moment of inertiaIx
3,569in⁴
Elastic section modulusSx
460.5in³
Plastic section modulusZx
690.7in³
Radius of gyrationrx
4.474in

Weak axis y–y

Moment of inertiaIy
1,964in⁴
Elastic section modulusSy
341.6in³
Plastic section modulusZy
512.5in³
Radius of gyrationry
3.32in

Torsion and stability

Torsional constantJ
4,278in⁴

Equivalents in other standards