Timbers – 5" and larger

6x6

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

Dimensions

Depthd
5.5in
Widthb
5.5in

Mass and area

Cross-sectional areaA
30.25in²
Outside perimeterP
22in

Strong axis x–x

Moment of inertiaIx
76.26in⁴
Elastic section modulusSx
27.73in³
Plastic section modulusZx
41.59in³
Radius of gyrationrx
1.588in

Weak axis y–y

Moment of inertiaIy
76.26in⁴
Elastic section modulusSy
27.73in³
Plastic section modulusZy
41.59in³
Radius of gyrationry
1.588in

Torsion and stability

Torsional constantJ
128.9in⁴

Equivalents in other standards