Dimensions and section properties for W18X50

Structural sectional properties for a W18X50 standard steel section

steel section diagram

US Customary Units

DescriptionSymbolValue
Shape Category / DesignationTypeW
Section NameNameW18X50
Cross Sectional AreaA14.7 in2
Section Widthb7.5 in
Section Depthd18 in
Flange thicknesstf0.57 in
Web thicknesstw0.355 in
Radius of Gyration about X-Xrx7.38 in
Radius of Gyrations about Y-Yry1.65 in
Moment of Inertia about X-XIx800 in4
Moment of Intertia about Y-YIy40.1 in4
Elastic Section Modulus about X-XSx88.9 in3
Elastic Section Modulus about Y-YSy10.7 in3
Plastic Section Modulus about X-XZx101 in3
Plastic Section Modulus about Y-YZy16.6 in3
St. Venant Torsional ConstantJ1.24 in4
Warping Torsion ConstantCw3040 in6
Self Weight of sectionWeight50 lb/ft

Metric Units

DescriptionSymbolValue
Shape Category / DesignationTypeW
Section NameNameW18X50
Cross Sectional AreaA9484 mm2
Section Widthb191 mm
Section Depthd457 mm
Flange thicknesstf14.5 mm
Web thicknesstw9 mm
Radius of Gyration about X-Xrx187 mm
Radius of Gyrations about Y-Yry42 mm
Moment of Inertia about X-XIx333000000 mm4
Moment of Intertia about Y-YIy17000000 mm4
Elastic Section Modulus about X-XSx1457000 mm3
Elastic Section Modulus about Y-YSy175000 mm3
Plastic Section Modulus about X-XZx1655000 mm3
Plastic Section Modulus about Y-YZy272000 mm3
St. Venant Torsional ConstantJ516000 mm4
Warping Torsion ConstantCw816000000000 mm6
Self Weight of sectionWeight74 kg/m

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

A W18X50 steel section is a standard North American steel section in the W - Wide Flange category. It weighs 50 lb/ft and has a cross sectional area of 14.7 in2. The height and width of the section are 18 in and 7.5 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