Rectangular and square HSS

HSS18X6X5/8 HSS457.2X152.4X15.9

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 = 0.581tdes = 0.581
Cross-section, to scaledimensions in inches

Dimensions

Depthd
18in
Widthb
6in
Nominal thicknesstnom
0.625in
Design thicknesstdes
0.581in

Mass and area

Mass per lengthm
93.34lb/ft
Cross-sectional areaA
25.7in²

Strong axis x–x

Moment of inertiaIx
923in⁴
Elastic section modulusSx
103in³
Plastic section modulusZx
135in³
Radius of gyrationrx
6in

Weak axis y–y

Moment of inertiaIy
158in⁴
Elastic section modulusSy
52.7in³
Plastic section modulusZy
61in³
Radius of gyrationry
2.48in

Torsion and stability

Torsional constantJ
462in⁴
Torsional modulusC
109in³

Slenderness ratios

Wall slendernessb/t
7.33
Wall slendernessh/t
28

Equivalents in other standards