Pipe

Pipe18XS Pipe450XS

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 = 0.465tdes = 0.465
Cross-section, to scaledimensions in inches

Dimensions

Outside diameterD
18in
Inside diameterID
17.1in
Nominal thicknesstnom
0.5in
Design thicknesstdes
0.465in

Mass and area

Mass per lengthm
93.5lb/ft
Cross-sectional areaA
24.8in²

Strong axis x–x

Moment of inertiaIx
956in⁴
Elastic section modulusSx
106in³
Plastic section modulusZx
139in³
Radius of gyrationrx
6.21in

Weak axis y–y

Moment of inertiaIy
956in⁴
Elastic section modulusSy
106in³
Plastic section modulusZy
139in³
Radius of gyrationry
6.21in

Torsion and stability

Torsional constantJ
1,910in⁴

Slenderness ratios

Wall slendernessD/t
38.7

Equivalents in other standards