Pipe

Pipe18STD Pipe450STD

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 = 0.349tdes = 0.349
Cross-section, to scaledimensions in inches

Dimensions

Outside diameterD
18in
Inside diameterID
17.3in
Nominal thicknesstnom
0.375in
Design thicknesstdes
0.349in

Mass and area

Mass per lengthm
70.7lb/ft
Cross-sectional areaA
19.4in²

Strong axis x–x

Moment of inertiaIx
756in⁴
Elastic section modulusSx
84in³
Plastic section modulusZx
109in³
Radius of gyrationrx
6.24in

Weak axis y–y

Moment of inertiaIy
756in⁴
Elastic section modulusSy
84in³
Plastic section modulusZy
109in³
Radius of gyrationry
6.24in

Torsion and stability

Torsional constantJ
1,510in⁴

Slenderness ratios

Wall slendernessD/t
51.6

Equivalents in other standards