Rectangular and square HSS

HSS18X18X1 HSS457.2X457.2X25.4

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 = 0.93tdes = 0.93
Cross-section, to scaledimensions in inches

Dimensions

Depthd
18in
Widthb
18in
Nominal thicknesstnom
1in
Design thicknesstdes
0.93in

Mass and area

Mass per lengthm
222.6lb/ft
Cross-sectional areaA
61.3in²

Strong axis x–x

Moment of inertiaIx
2,920in⁴
Elastic section modulusSx
324in³
Plastic section modulusZx
387in³
Radius of gyrationrx
6.9in

Weak axis y–y

Moment of inertiaIy
2,920in⁴
Elastic section modulusSy
324in³
Plastic section modulusZy
387in³
Radius of gyrationry
6.9in

Torsion and stability

Torsional constantJ
4,740in⁴
Torsional modulusC
539in³

Slenderness ratios

Wall slendernessb/t
16.4
Wall slendernessh/t
16.4

Equivalents in other standards