Rectangular and square HSS

HSS 305x203x16

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 = 203.2d = 304.8t = 15.88t = 15.88
Cross-section, to scaledimensions in mm

Dimensions

Depthd
304.8mm
Widthb
203.2mm
Thicknesst
15.88mm
Outside corner radiusro
31.75mm

Mass and area

Mass per lengthm
113.6kg/m
Cross-sectional areaA
14,477mm²
Outside perimeterP
961.5mm

Strong axis x–x

Moment of inertiaIx
174.210⁶ mm⁴
Elastic section modulusSx
1,14310³ mm³
Plastic section modulusZx
1,42710³ mm³
Radius of gyrationrx
109.7mm

Weak axis y–y

Moment of inertiaIy
92.1610⁶ mm⁴
Elastic section modulusSy
907.110³ mm³
Plastic section modulusZy
1,07610³ mm³
Radius of gyrationry
79.79mm

Torsion and stability

Torsional constantJ
201,65610³ mm⁴

Equivalents in other standards