Rectangular and square HSS

HSS18X10X5/8 HSS457.2X254X15.9

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 = 10d = 18tdes = 0.581tdes = 0.581
Cross-section, to scaledimensions in inches

Dimensions

Depthd
18in
Widthb
10in
Nominal thicknesstnom
0.625in
Design thicknesstdes
0.581in

Mass and area

Mass per lengthm
110.4lb/ft
Cross-sectional areaA
30.3in²

Strong axis x–x

Moment of inertiaIx
1,280in⁴
Elastic section modulusSx
142in³
Plastic section modulusZx
176in³
Radius of gyrationrx
6.49in

Weak axis y–y

Moment of inertiaIy
511in⁴
Elastic section modulusSy
102in³
Plastic section modulusZy
117in³
Radius of gyrationry
4.1in

Torsion and stability

Torsional constantJ
1,190in⁴
Torsional modulusC
190in³

Slenderness ratios

Wall slendernessb/t
14.2
Wall slendernessh/t
28

Equivalents in other standards