Rectangular and square HSS

HSS 305x51x8.0

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 = 50.8d = 304.8t = 7.94t = 7.94
Cross-section, to scaledimensions in mm

Dimensions

Depthd
304.8mm
Widthb
50.8mm
Thicknesst
7.94mm
Outside corner radiusro
15.88mm

Mass and area

Mass per lengthm
41.07kg/m
Cross-sectional areaA
5,232mm²
Outside perimeterP
683.9mm

Strong axis x–x

Moment of inertiaIx
4610⁶ mm⁴
Elastic section modulusSx
301.810³ mm³
Plastic section modulusZx
426.610³ mm³
Radius of gyrationrx
93.76mm

Weak axis y–y

Moment of inertiaIy
2.21310⁶ mm⁴
Elastic section modulusSy
87.1210³ mm³
Plastic section modulusZy
104.710³ mm³
Radius of gyrationry
20.56mm

Torsion and stability

Torsional constantJ
7,76310³ mm⁴

Equivalents in other standards