Rectangular and square HSS

HSS18X18X3/4 HSS457.2X457.2X19.0

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 = 0.698tdes = 0.698
Cross-section, to scaledimensions in inches

Dimensions

Depthd
18in
Widthb
18in
Nominal thicknesstnom
0.75in
Design thicknesstdes
0.698in

Mass and area

Mass per lengthm
171.2lb/ft
Cross-sectional areaA
47.1in²

Strong axis x–x

Moment of inertiaIx
2,320in⁴
Elastic section modulusSx
258in³
Plastic section modulusZx
302in³
Radius of gyrationrx
7.02in

Weak axis y–y

Moment of inertiaIy
2,320in⁴
Elastic section modulusSy
258in³
Plastic section modulusZy
302in³
Radius of gyrationry
7.02in

Torsion and stability

Torsional constantJ
3,690in⁴
Torsional modulusC
417in³

Slenderness ratios

Wall slendernessb/t
22.8
Wall slendernessh/t
22.8

Equivalents in other standards