Rectangular and square HSS

HSS18X10X1/2 HSS457.2X254X12.7

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 = 10d = 18tdes = 0.465tdes = 0.465
Cross-section, to scaledimensions in inches

Dimensions

Depthd
18in
Widthb
10in
Nominal thicknesstnom
0.5in
Design thicknesstdes
0.465in

Mass and area

Mass per lengthm
89.68lb/ft
Cross-sectional areaA
24.6in²

Strong axis x–x

Moment of inertiaIx
1,060in⁴
Elastic section modulusSx
117in³
Plastic section modulusZx
144in³
Radius of gyrationrx
6.55in

Weak axis y–y

Moment of inertiaIy
425in⁴
Elastic section modulusSy
85in³
Plastic section modulusZy
96.2in³
Radius of gyrationry
4.16in

Torsion and stability

Torsional constantJ
977in⁴
Torsional modulusC
155in³

Slenderness ratios

Wall slendernessb/t
18.5
Wall slendernessh/t
35.7

Equivalents in other standards