Dimensions and section properties for W18X71

Structural sectional properties for a W18X71 standard steel section

steel section diagram

US Customary Units

DescriptionSymbolValue
Shape Category / DesignationTypeW
Section NameNameW18X71
Cross Sectional AreaA20.9 in2
Section Widthb7.64 in
Section Depthd18.5 in
Flange thicknesstf0.81 in
Web thicknesstw0.495 in
Radius of Gyration about X-Xrx7.5 in
Radius of Gyrations about Y-Yry1.7 in
Moment of Inertia about X-XIx1170 in4
Moment of Intertia about Y-YIy60.3 in4
Elastic Section Modulus about X-XSx127 in3
Elastic Section Modulus about Y-YSy15.8 in3
Plastic Section Modulus about X-XZx146 in3
Plastic Section Modulus about Y-YZy24.7 in3
St. Venant Torsional ConstantJ3.49 in4
Warping Torsion ConstantCw4700 in6
Self Weight of sectionWeight71 lb/ft

Metric Units

DescriptionSymbolValue
Shape Category / DesignationTypeW
Section NameNameW18X71
Cross Sectional AreaA13484 mm2
Section Widthb194 mm
Section Depthd470 mm
Flange thicknesstf20.6 mm
Web thicknesstw12.6 mm
Radius of Gyration about X-Xrx191 mm
Radius of Gyrations about Y-Yry43 mm
Moment of Inertia about X-XIx487000000 mm4
Moment of Intertia about Y-YIy25000000 mm4
Elastic Section Modulus about X-XSx2081000 mm3
Elastic Section Modulus about Y-YSy259000 mm3
Plastic Section Modulus about X-XZx2393000 mm3
Plastic Section Modulus about Y-YZy405000 mm3
St. Venant Torsional ConstantJ1453000 mm4
Warping Torsion ConstantCw1262000000000 mm6
Self Weight of sectionWeight106 kg/m

Note: Metric units have been converted from tabulated imperial values and rounded to a reasonable number of significant figures.

A W18X71 steel section is a standard North American steel section in the W - Wide Flange category. It weighs 71 lb/ft and has a cross sectional area of 20.9 in2. The height and width of the section are 18.5 in and 7.64 in respectively.

The section has a tensile yield capacity of:

kip

The section has a flexural plastic moment capacity of:

kip-ft

The section has a flexural elastic moment capacity of:

kip-ft