Rectangular and square HSS

HSS 305x254x4.8

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 = 254d = 304.8t = 4.76t = 4.76
Cross-section, to scaledimensions in mm

Dimensions

Depthd
304.8mm
Widthb
254mm
Thicknesst
4.76mm
Outside corner radiusro
9.52mm

Mass and area

Mass per lengthm
40.59kg/m
Cross-sectional areaA
5,171mm²
Outside perimeterP
1,101mm

Strong axis x–x

Moment of inertiaIx
73.5110⁶ mm⁴
Elastic section modulusSx
482.410³ mm³
Plastic section modulusZx
561.410³ mm³
Radius of gyrationrx
119.2mm

Weak axis y–y

Moment of inertiaIy
55.7310⁶ mm⁴
Elastic section modulusSy
438.910³ mm³
Plastic section modulusZy
496.510³ mm³
Radius of gyrationry
103.8mm

Torsion and stability

Torsional constantJ
97,94310³ mm⁴

Equivalents in other standards