Timbers – 5" and larger

8x16

Standard: DOC PS 20 / NDS SupplementSource: Nominal − ½" (green), calculated
xyb = 7.5d = 15.5
Cross-section, to scaledimensions in inches

Dimensions

Depthd
15.5in
Widthb
7.5in

Mass and area

Cross-sectional areaA
116.2in²
Outside perimeterP
46in

Strong axis x–x

Moment of inertiaIx
2,327in⁴
Elastic section modulusSx
300.3in³
Plastic section modulusZx
450.5in³
Radius of gyrationrx
4.474in

Weak axis y–y

Moment of inertiaIy
544.9in⁴
Elastic section modulusSy
145.3in³
Plastic section modulusZy
218in³
Radius of gyrationry
2.165in

Torsion and stability

Torsional constantJ
1,518in⁴

Equivalents in other standards