Rectangular and square HSS

HSS20X16X5/16 HSS508X406.4X7.9

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 = 16d = 20tdes = 0.291tdes = 0.291
Cross-section, to scaledimensions in inches

Dimensions

Depthd
20in
Widthb
16in
Nominal thicknesstnom
0.3125in
Design thicknesstdes
0.291in

Mass and area

Mass per lengthm
74.38lb/ft
Cross-sectional areaA
20.4in²

Strong axis x–x

Moment of inertiaIx
1,240in⁴
Elastic section modulusSx
124in³
Plastic section modulusZx
144in³
Radius of gyrationrx
7.79in

Weak axis y–y

Moment of inertiaIy
882in⁴
Elastic section modulusSy
110in³
Plastic section modulusZy
124in³
Radius of gyrationry
6.58in

Torsion and stability

Torsional constantJ
1,590in⁴
Torsional modulusC
180in³

Slenderness ratios

Wall slendernessb/t
52
Wall slendernessh/t
65.7

Equivalents in other standards