Rectangular and square HSS

HSS12X12X5/16 HSS304.8X304.8X7.9

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 = 12d = 12tdes = 0.291tdes = 0.291
Cross-section, to scaledimensions in inches

Dimensions

Depthd
12in
Widthb
12in
Nominal thicknesstnom
0.3125in
Design thicknesstdes
0.291in

Mass and area

Mass per lengthm
48.86lb/ft
Cross-sectional areaA
13.4in²

Strong axis x–x

Moment of inertiaIx
304in⁴
Elastic section modulusSx
50.7in³
Plastic section modulusZx
58.6in³
Radius of gyrationrx
4.76in

Weak axis y–y

Moment of inertiaIy
304in⁴
Elastic section modulusSy
50.7in³
Plastic section modulusZy
58.6in³
Radius of gyrationry
4.76in

Torsion and stability

Torsional constantJ
474in⁴
Torsional modulusC
79.7in³

Slenderness ratios

Wall slendernessb/t
38.2
Wall slendernessh/t
38.2

Equivalents in other standards