Rectangular and square HSS

HSS20X6X5/8 HSS508X152.4X15.9

Standard: AISC Shapes Database v16.0Source: AISC (aisc.org) — Shapes Database v16.0 (Excel file)
Values published by AISC, in US customary (original) and SI units.
xyb = 6d = 20tdes = 0.581tdes = 0.581
Cross-section, to scaledimensions in inches

Dimensions

Depthd
20in
Widthb
6in
Nominal thicknesstnom
0.625in
Design thicknesstdes
0.581in

Mass and area

Mass per lengthm
101.9lb/ft
Cross-sectional areaA
28in²

Strong axis x–x

Moment of inertiaIx
1,220in⁴
Elastic section modulusSx
122in³
Plastic section modulusZx
162in³
Radius of gyrationrx
6.6in

Weak axis y–y

Moment of inertiaIy
175in⁴
Elastic section modulusSy
58.4in³
Plastic section modulusZy
67.3in³
Radius of gyrationry
2.5in

Torsion and stability

Torsional constantJ
528in⁴
Torsional modulusC
122in³

Slenderness ratios

Wall slendernessb/t
7.33
Wall slendernessh/t
31.4

Equivalents in other standards