Rectangular and square HSS

HSS18X6X3/8 HSS457.2X152.4X9.5

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 = 0.349tdes = 0.349
Cross-section, to scaledimensions in inches

Dimensions

Depthd
18in
Widthb
6in
Nominal thicknesstnom
0.375in
Design thicknesstdes
0.349in

Mass and area

Mass per lengthm
58.1lb/ft
Cross-sectional areaA
16in²

Strong axis x–x

Moment of inertiaIx
602in⁴
Elastic section modulusSx
66.9in³
Plastic section modulusZx
86.4in³
Radius of gyrationrx
6.15in

Weak axis y–y

Moment of inertiaIy
106in⁴
Elastic section modulusSy
35.5in³
Plastic section modulusZy
39.5in³
Radius of gyrationry
2.58in

Torsion and stability

Torsional constantJ
302in⁴
Torsional modulusC
69.5in³

Slenderness ratios

Wall slendernessb/t
14.2
Wall slendernessh/t
48.6

Equivalents in other standards