Rectangular and square HSS

HSS18X8X1/4 HSS457.2X203.2X6.4

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 = 8d = 18tdes = 0.233tdes = 0.233
Cross-section, to scaledimensions in inches

Dimensions

Depthd
18in
Widthb
8in
Nominal thicknesstnom
0.25in
Design thicknesstdes
0.233in

Mass and area

Mass per lengthm
42.84lb/ft
Cross-sectional areaA
11.8in²

Strong axis x–x

Moment of inertiaIx
492in⁴
Elastic section modulusSx
54.7in³
Plastic section modulusZx
67.7in³
Radius of gyrationrx
6.47in

Weak axis y–y

Moment of inertiaIy
141in⁴
Elastic section modulusSy
35.2in³
Plastic section modulusZy
38.6in³
Radius of gyrationry
3.46in

Torsion and stability

Torsional constantJ
351in⁴
Torsional modulusC
64.3in³

Slenderness ratios

Wall slendernessb/t
31.3
Wall slendernessh/t
74.3

Equivalents in other standards