Rectangular and square HSS

HSS18X10X5/16 HSS457.2X254X7.9

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 = 0.291tdes = 0.291
Cross-section, to scaledimensions in inches

Dimensions

Depthd
18in
Widthb
10in
Nominal thicknesstnom
0.3125in
Design thicknesstdes
0.291in

Mass and area

Mass per lengthm
57.36lb/ft
Cross-sectional areaA
15.7in²

Strong axis x–x

Moment of inertiaIx
695in⁴
Elastic section modulusSx
77.2in³
Plastic section modulusZx
93.7in³
Radius of gyrationrx
6.65in

Weak axis y–y

Moment of inertiaIy
282in⁴
Elastic section modulusSy
56.4in³
Plastic section modulusZy
62.7in³
Radius of gyrationry
4.23in

Torsion and stability

Torsional constantJ
635in⁴
Torsional modulusC
100in³

Slenderness ratios

Wall slendernessb/t
31.4
Wall slendernessh/t
58.9

Equivalents in other standards