Rectangular and square HSS

HSS18X6X1/2 HSS457.2X152.4X12.7

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 = 0.465tdes = 0.465
Cross-section, to scaledimensions in inches

Dimensions

Depthd
18in
Widthb
6in
Nominal thicknesstnom
0.5in
Design thicknesstdes
0.465in

Mass and area

Mass per lengthm
76.07lb/ft
Cross-sectional areaA
20.9in²

Strong axis x–x

Moment of inertiaIx
770in⁴
Elastic section modulusSx
85.6in³
Plastic section modulusZx
112in³
Radius of gyrationrx
6.07in

Weak axis y–y

Moment of inertiaIy
134in⁴
Elastic section modulusSy
44.6in³
Plastic section modulusZy
50.7in³
Radius of gyrationry
2.53in

Torsion and stability

Torsional constantJ
387in⁴
Torsional modulusC
89.9in³

Slenderness ratios

Wall slendernessb/t
9.9
Wall slendernessh/t
35.7

Equivalents in other standards