Round HSS

HSS20.000X0.313 HSS508X7.9

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.
xyD = 20tdes = 0.291tdes = 0.291
Cross-section, to scaledimensions in inches

Dimensions

Outside diameterD
20in
Nominal thicknesstnom
0.313in
Design thicknesstdes
0.291in

Mass and area

Mass per lengthm
65.77lb/ft
Cross-sectional areaA
18in²

Strong axis x–x

Moment of inertiaIx
874in⁴
Elastic section modulusSx
87.4in³
Plastic section modulusZx
113in³
Radius of gyrationrx
6.97in

Weak axis y–y

Moment of inertiaIy
874in⁴
Elastic section modulusSy
87.4in³
Plastic section modulusZy
113in³
Radius of gyrationry
6.97in

Torsion and stability

Torsional constantJ
1,750in⁴
Torsional modulusC
175in³

Slenderness ratios

Wall slendernessD/t
68.8

Equivalents in other standards