Rectangular and square HSS

HSS18X6X5/16 HSS457.2X152.4X7.9

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 = 6d = 18tdes = 0.291tdes = 0.291
Cross-section, to scaledimensions in inches

Dimensions

Depthd
18in
Widthb
6in
Nominal thicknesstnom
0.3125in
Design thicknesstdes
0.291in

Mass and area

Mass per lengthm
48.86lb/ft
Cross-sectional areaA
13.4in²

Strong axis x–x

Moment of inertiaIx
513in⁴
Elastic section modulusSx
57in³
Plastic section modulusZx
73.1in³
Radius of gyrationrx
6.18in

Weak axis y–y

Moment of inertiaIy
91.3in⁴
Elastic section modulusSy
30.4in³
Plastic section modulusZy
33.5in³
Radius of gyrationry
2.61in

Torsion and stability

Torsional constantJ
257in⁴
Torsional modulusC
58.7in³

Slenderness ratios

Wall slendernessb/t
17.6
Wall slendernessh/t
58.9

Equivalents in other standards