Rectangular and square HSS

HSS 406x305x16

Standard: CSA G40.20/G40.21Source: Calculated (exact engine)
Calculated: design thickness = nominal thickness (CSA G40.20, Class C), outside radius 2t. Range derived from ASTM A500 sizes — cross-check with the CISC tables.
xyb = 304.8d = 406.4t = 15.88t = 15.88
Cross-section, to scaledimensions in mm

Dimensions

Depthd
406.4mm
Widthb
304.8mm
Thicknesst
15.88mm
Outside corner radiusro
31.75mm

Mass and area

Mass per lengthm
164.3kg/m
Cross-sectional areaA
20,930mm²
Outside perimeterP
1,368mm

Strong axis x–x

Moment of inertiaIx
482.510⁶ mm⁴
Elastic section modulusSx
2,37410³ mm³
Plastic section modulusZx
2,87510³ mm³
Radius of gyrationrx
151.8mm

Weak axis y–y

Moment of inertiaIy
30910⁶ mm⁴
Elastic section modulusSy
2,02810³ mm³
Plastic section modulusZy
2,36010³ mm³
Radius of gyrationry
121.5mm

Torsion and stability

Torsional constantJ
610,01010³ mm⁴

Equivalents in other standards