Rectangular and square HSS

HSS20X8X5/16 HSS508X203.2X7.9

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 = 8d = 20tdes = 0.291tdes = 0.291
Cross-section, to scaledimensions in inches

Dimensions

Depthd
20in
Widthb
8in
Nominal thicknesstnom
0.3125in
Design thicknesstdes
0.291in

Mass and area

Mass per lengthm
57.36lb/ft
Cross-sectional areaA
15.7in²

Strong axis x–x

Moment of inertiaIx
786in⁴
Elastic section modulusSx
78.6in³
Plastic section modulusZx
98.6in³
Radius of gyrationrx
7.07in

Weak axis y–y

Moment of inertiaIy
189in⁴
Elastic section modulusSy
47.4in³
Plastic section modulusZy
52in³
Radius of gyrationry
3.47in

Torsion and stability

Torsional constantJ
496in⁴
Torsional modulusC
88.3in³

Slenderness ratios

Wall slendernessb/t
24.5
Wall slendernessh/t
65.7

Equivalents in other standards