Rectangular and square HSS

HSS18X10X3/8 HSS457.2X254X9.5

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 = 10d = 18tdes = 0.349tdes = 0.349
Cross-section, to scaledimensions in inches

Dimensions

Depthd
18in
Widthb
10in
Nominal thicknesstnom
0.375in
Design thicknesstdes
0.349in

Mass and area

Mass per lengthm
68.31lb/ft
Cross-sectional areaA
18.7in²

Strong axis x–x

Moment of inertiaIx
820in⁴
Elastic section modulusSx
91.1in³
Plastic section modulusZx
111in³
Radius of gyrationrx
6.61in

Weak axis y–y

Moment of inertiaIy
332in⁴
Elastic section modulusSy
66.4in³
Plastic section modulusZy
74.2in³
Radius of gyrationry
4.21in

Torsion and stability

Torsional constantJ
752in⁴
Torsional modulusC
119in³

Slenderness ratios

Wall slendernessb/t
25.7
Wall slendernessh/t
48.6

Equivalents in other standards