Rectangular and square HSS

HSS 305x76x6.4

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 = 76.2d = 304.8t = 6.35t = 6.35
Cross-section, to scaledimensions in mm

Dimensions

Depthd
304.8mm
Widthb
76.2mm
Thicknesst
6.35mm
Outside corner radiusro
12.7mm

Mass and area

Mass per lengthm
35.9kg/m
Cross-sectional areaA
4,574mm²
Outside perimeterP
740.2mm

Strong axis x–x

Moment of inertiaIx
45.5610⁶ mm⁴
Elastic section modulusSx
298.910³ mm³
Plastic section modulusZx
399.610³ mm³
Radius of gyrationrx
99.8mm

Weak axis y–y

Moment of inertiaIy
4.86510⁶ mm⁴
Elastic section modulusSy
127.710³ mm³
Plastic section modulusZy
144.210³ mm³
Radius of gyrationry
32.61mm

Torsion and stability

Torsional constantJ
15,27310³ mm⁴

Equivalents in other standards