Rectangular and square HSS

HSS20X16X1/4 HSS508X406.4X6.4

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 = 0.233tdes = 0.233
Cross-section, to scaledimensions in inches

Dimensions

Depthd
20in
Widthb
16in
Nominal thicknesstnom
0.25in
Design thicknesstdes
0.233in

Mass and area

Mass per lengthm
59.85lb/ft
Cross-sectional areaA
16.4in²

Strong axis x–x

Moment of inertiaIx
1,000in⁴
Elastic section modulusSx
100in³
Plastic section modulusZx
117in³
Radius of gyrationrx
7.82in

Weak axis y–y

Moment of inertiaIy
716in⁴
Elastic section modulusSy
89.5in³
Plastic section modulusZy
100in³
Radius of gyrationry
6.6in

Torsion and stability

Torsional constantJ
1,280in⁴
Torsional modulusC
145in³

Slenderness ratios

Wall slendernessb/t
65.7
Wall slendernessh/t
82.8

Equivalents in other standards