Rectangular and square HSS

HSS20X12X7/8 HSS508X304.8X22.2

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 = 0.814tdes = 0.814
Cross-section, to scaledimensions in inches

Dimensions

Depthd
20in
Widthb
12in
Nominal thicknesstnom
0.875in
Design thicknesstdes
0.814in

Mass and area

Mass per lengthm
173.4lb/ft
Cross-sectional areaA
47.7in²

Strong axis x–x

Moment of inertiaIx
2,480in⁴
Elastic section modulusSx
248in³
Plastic section modulusZx
308in³
Radius of gyrationrx
7.2in

Weak axis y–y

Moment of inertiaIy
1,110in⁴
Elastic section modulusSy
186in³
Plastic section modulusZy
216in³
Radius of gyrationry
4.83in

Torsion and stability

Torsional constantJ
2,530in⁴
Torsional modulusC
347in³

Slenderness ratios

Wall slendernessb/t
11.7
Wall slendernessh/t
21.6

Equivalents in other standards