Rectangular and square HSS

HSS 305x51x6.4

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 = 6.35t = 6.35
Cross-section, to scaledimensions in mm

Dimensions

Depthd
304.8mm
Widthb
50.8mm
Thicknesst
6.35mm
Outside corner radiusro
12.7mm

Mass and area

Mass per lengthm
33.37kg/m
Cross-sectional areaA
4,251mm²
Outside perimeterP
689.4mm

Strong axis x–x

Moment of inertiaIx
38.3710⁶ mm⁴
Elastic section modulusSx
251.810³ mm³
Plastic section modulusZx
351.510³ mm³
Radius of gyrationrx
95.01mm

Weak axis y–y

Moment of inertiaIy
1.92310⁶ mm⁴
Elastic section modulusSy
75.7110³ mm³
Plastic section modulusZy
88.1310³ mm³
Radius of gyrationry
21.27mm

Torsion and stability

Torsional constantJ
6,65610³ mm⁴

Equivalents in other standards