Rectangular and square HSS

HSS20X12X3/8 HSS508X304.8X9.5

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 = 12d = 20tdes = 0.349tdes = 0.349
Cross-section, to scaledimensions in inches

Dimensions

Depthd
20in
Widthb
12in
Nominal thicknesstnom
0.375in
Design thicknesstdes
0.349in

Mass and area

Mass per lengthm
78.52lb/ft
Cross-sectional areaA
21.5in²

Strong axis x–x

Moment of inertiaIx
1,200in⁴
Elastic section modulusSx
120in³
Plastic section modulusZx
144in³
Radius of gyrationrx
7.45in

Weak axis y–y

Moment of inertiaIy
547in⁴
Elastic section modulusSy
91.1in³
Plastic section modulusZy
102in³
Radius of gyrationry
5.04in

Torsion and stability

Torsional constantJ
1,180in⁴
Torsional modulusC
160in³

Slenderness ratios

Wall slendernessb/t
31.4
Wall slendernessh/t
54.3

Equivalents in other standards