Rectangular and square HSS

HSS20X8X3/4 HSS508X203.2X19.0

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 = 0.698tdes = 0.698
Cross-section, to scaledimensions in inches

Dimensions

Depthd
20in
Widthb
8in
Nominal thicknesstnom
0.75in
Design thicknesstdes
0.698in

Mass and area

Mass per lengthm
130.3lb/ft
Cross-sectional areaA
35.9in²

Strong axis x–x

Moment of inertiaIx
1,670in⁴
Elastic section modulusSx
167in³
Plastic section modulusZx
216in³
Radius of gyrationrx
6.82in

Weak axis y–y

Moment of inertiaIy
388in⁴
Elastic section modulusSy
97.1in³
Plastic section modulusZy
112in³
Radius of gyrationry
3.29in

Torsion and stability

Torsional constantJ
1,060in⁴
Torsional modulusC
195in³

Slenderness ratios

Wall slendernessb/t
8.46
Wall slendernessh/t
25.7

Equivalents in other standards