Rectangular and square HSS

HSS18X18X1/4 HSS457.2X457.2X6.4

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

Dimensions

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

Mass and area

Mass per lengthm
59.85lb/ft
Cross-sectional areaA
16.4in²

Strong axis x–x

Moment of inertiaIx
860in⁴
Elastic section modulusSx
95.6in³
Plastic section modulusZx
109in³
Radius of gyrationrx
7.24in

Weak axis y–y

Moment of inertiaIy
860in⁴
Elastic section modulusSy
95.6in³
Plastic section modulusZy
109in³
Radius of gyrationry
7.24in

Torsion and stability

Torsional constantJ
1,320in⁴
Torsional modulusC
147in³

Slenderness ratios

Wall slendernessb/t
74.3
Wall slendernessh/t
74.3

Equivalents in other standards