Rectangular and square HSS

HSS18X18X1/2 HSS457.2X457.2X12.7

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 = 18d = 18tdes = 0.465tdes = 0.465
Cross-section, to scaledimensions in inches

Dimensions

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

Mass and area

Mass per lengthm
116.9lb/ft
Cross-sectional areaA
32.1in²

Strong axis x–x

Moment of inertiaIx
1,630in⁴
Elastic section modulusSx
181in³
Plastic section modulusZx
210in³
Radius of gyrationrx
7.13in

Weak axis y–y

Moment of inertiaIy
1,630in⁴
Elastic section modulusSy
181in³
Plastic section modulusZy
210in³
Radius of gyrationry
7.13in

Torsion and stability

Torsional constantJ
2,540in⁴
Torsional modulusC
286in³

Slenderness ratios

Wall slendernessb/t
35.7
Wall slendernessh/t
35.7

Equivalents in other standards