Rectangular and square HSS

HSS20X12X3/4 HSS508X304.8X19.0

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 = 12d = 20tdes = 0.698tdes = 0.698
Cross-section, to scaledimensions in inches

Dimensions

Depthd
20in
Widthb
12in
Nominal thicknesstnom
0.75in
Design thicknesstdes
0.698in

Mass and area

Mass per lengthm
150.8lb/ft
Cross-sectional areaA
41.5in²

Strong axis x–x

Moment of inertiaIx
2,190in⁴
Elastic section modulusSx
219in³
Plastic section modulusZx
270in³
Radius of gyrationrx
7.26in

Weak axis y–y

Moment of inertiaIy
988in⁴
Elastic section modulusSy
165in³
Plastic section modulusZy
190in³
Radius of gyrationry
4.88in

Torsion and stability

Torsional constantJ
2,220in⁴
Torsional modulusC
303in³

Slenderness ratios

Wall slendernessb/t
14.2
Wall slendernessh/t
25.6

Equivalents in other standards