Round HSS

HSS18.000X1.000 HSS457.2X25.4

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 = 18tdes = 0.93tdes = 0.93
Cross-section, to scaledimensions in inches

Dimensions

Outside diameterD
18in
Nominal thicknesstnom
1in
Design thicknesstdes
0.93in

Mass and area

Mass per lengthm
181.7lb/ft
Cross-sectional areaA
49.9in²

Strong axis x–x

Moment of inertiaIx
1,820in⁴
Elastic section modulusSx
202in³
Plastic section modulusZx
271in³
Radius of gyrationrx
6.04in

Weak axis y–y

Moment of inertiaIy
1,820in⁴
Elastic section modulusSy
202in³
Plastic section modulusZy
271in³
Radius of gyrationry
6.04in

Torsion and stability

Torsional constantJ
3,640in⁴
Torsional modulusC
403in³

Slenderness ratios

Wall slendernessD/t
19.4

Equivalents in other standards