Rectangular and square HSS

HSS20X12X5/8 HSS508X304.8X15.9

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 = 12d = 20tdes = 0.581tdes = 0.581
Cross-section, to scaledimensions in inches

Dimensions

Depthd
20in
Widthb
12in
Nominal thicknesstnom
0.625in
Design thicknesstdes
0.581in

Mass and area

Mass per lengthm
127.4lb/ft
Cross-sectional areaA
35in²

Strong axis x–x

Moment of inertiaIx
1,880in⁴
Elastic section modulusSx
188in³
Plastic section modulusZx
230in³
Radius of gyrationrx
7.33in

Weak axis y–y

Moment of inertiaIy
851in⁴
Elastic section modulusSy
142in³
Plastic section modulusZy
162in³
Radius of gyrationry
4.93in

Torsion and stability

Torsional constantJ
1,890in⁴
Torsional modulusC
257in³

Slenderness ratios

Wall slendernessb/t
17.7
Wall slendernessh/t
31.4

Equivalents in other standards