Rectangular and square HSS

HSS20X8X3/8 HSS508X203.2X9.5

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 = 0.349tdes = 0.349
Cross-section, to scaledimensions in inches

Dimensions

Depthd
20in
Widthb
8in
Nominal thicknesstnom
0.375in
Design thicknesstdes
0.349in

Mass and area

Mass per lengthm
68.31lb/ft
Cross-sectional areaA
18.7in²

Strong axis x–x

Moment of inertiaIx
926in⁴
Elastic section modulusSx
92.6in³
Plastic section modulusZx
117in³
Radius of gyrationrx
7.03in

Weak axis y–y

Moment of inertiaIy
222in⁴
Elastic section modulusSy
55.6in³
Plastic section modulusZy
61.5in³
Radius of gyrationry
3.44in

Torsion and stability

Torsional constantJ
586in⁴
Torsional modulusC
105in³

Slenderness ratios

Wall slendernessb/t
19.9
Wall slendernessh/t
54.3

Equivalents in other standards