Rectangular and square HSS

HSS20X8X5/8 HSS508X203.2X15.9

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 = 8d = 20tdes = 0.581tdes = 0.581
Cross-section, to scaledimensions in inches

Dimensions

Depthd
20in
Widthb
8in
Nominal thicknesstnom
0.625in
Design thicknesstdes
0.581in

Mass and area

Mass per lengthm
110.4lb/ft
Cross-sectional areaA
30.3in²

Strong axis x–x

Moment of inertiaIx
1,440in⁴
Elastic section modulusSx
144in³
Plastic section modulusZx
185in³
Radius of gyrationrx
6.89in

Weak axis y–y

Moment of inertiaIy
338in⁴
Elastic section modulusSy
84.6in³
Plastic section modulusZy
96.4in³
Radius of gyrationry
3.34in

Torsion and stability

Torsional constantJ
916in⁴
Torsional modulusC
167in³

Slenderness ratios

Wall slendernessb/t
10.8
Wall slendernessh/t
31.4

Equivalents in other standards