Rectangular and square HSS

HSS20X20X5/8 HSS508X508X15.9

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

Dimensions

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

Mass and area

Mass per lengthm
161.4lb/ft
Cross-sectional areaA
44.3in²

Strong axis x–x

Moment of inertiaIx
2,750in⁴
Elastic section modulusSx
275in³
Plastic section modulusZx
320in³
Radius of gyrationrx
7.88in

Weak axis y–y

Moment of inertiaIy
2,750in⁴
Elastic section modulusSy
275in³
Plastic section modulusZy
320in³
Radius of gyrationry
7.88in

Torsion and stability

Torsional constantJ
4,320in⁴
Torsional modulusC
437in³

Slenderness ratios

Wall slendernessb/t
31.5
Wall slendernessh/t
31.5

Equivalents in other standards