Rectangular and square HSS

HSS20X16X5/8 HSS508X406.4X15.9

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 = 16d = 20tdes = 0.581tdes = 0.581
Cross-section, to scaledimensions in inches

Dimensions

Depthd
20in
Widthb
16in
Nominal thicknesstnom
0.625in
Design thicknesstdes
0.581in

Mass and area

Mass per lengthm
144.4lb/ft
Cross-sectional areaA
39.6in²

Strong axis x–x

Moment of inertiaIx
2,320in⁴
Elastic section modulusSx
232in³
Plastic section modulusZx
275in³
Radius of gyrationrx
7.65in

Weak axis y–y

Moment of inertiaIy
1,640in⁴
Elastic section modulusSy
206in³
Plastic section modulusZy
236in³
Radius of gyrationry
6.44in

Torsion and stability

Torsional constantJ
3,040in⁴
Torsional modulusC
347in³

Slenderness ratios

Wall slendernessb/t
24.5
Wall slendernessh/t
31.4

Equivalents in other standards