Rectangular and square HSS

HSS20X16X3/8 HSS508X406.4X9.5

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 = 16d = 20tdes = 0.349tdes = 0.349
Cross-section, to scaledimensions in inches

Dimensions

Depthd
20in
Widthb
16in
Nominal thicknesstnom
0.375in
Design thicknesstdes
0.349in

Mass and area

Mass per lengthm
88.73lb/ft
Cross-sectional areaA
24.3in²

Strong axis x–x

Moment of inertiaIx
1,470in⁴
Elastic section modulusSx
147in³
Plastic section modulusZx
172in³
Radius of gyrationrx
7.76in

Weak axis y–y

Moment of inertiaIy
1,040in⁴
Elastic section modulusSy
130in³
Plastic section modulusZy
148in³
Radius of gyrationry
6.55in

Torsion and stability

Torsional constantJ
1,890in⁴
Torsional modulusC
215in³

Slenderness ratios

Wall slendernessb/t
42.8
Wall slendernessh/t
54.3

Equivalents in other standards