Dimensions and section properties for W18X311

Structural sectional properties for a W18X311 standard steel section

steel section diagram

US Customary Units

DescriptionSymbolValue
Shape Category / DesignationTypeW
Section NameNameW18X311
Cross Sectional AreaA91.6 in2
Section Widthb12 in
Section Depthd22.3 in
Flange thicknesstf2.74 in
Web thicknesstw1.52 in
Radius of Gyration about X-Xrx8.72 in
Radius of Gyrations about Y-Yry2.95 in
Moment of Inertia about X-XIx6970 in4
Moment of Intertia about Y-YIy795 in4
Elastic Section Modulus about X-XSx624 in3
Elastic Section Modulus about Y-YSy132 in3
Plastic Section Modulus about X-XZx754 in3
Plastic Section Modulus about Y-YZy207 in3
St. Venant Torsional ConstantJ176 in4
Warping Torsion ConstantCw76200 in6
Self Weight of sectionWeight311 lb/ft

Metric Units

DescriptionSymbolValue
Shape Category / DesignationTypeW
Section NameNameW18X311
Cross Sectional AreaA59097 mm2
Section Widthb305 mm
Section Depthd566 mm
Flange thicknesstf69.6 mm
Web thicknesstw38.6 mm
Radius of Gyration about X-Xrx221 mm
Radius of Gyrations about Y-Yry75 mm
Moment of Inertia about X-XIx2901000000 mm4
Moment of Intertia about Y-YIy331000000 mm4
Elastic Section Modulus about X-XSx10226000 mm3
Elastic Section Modulus about Y-YSy2163000 mm3
Plastic Section Modulus about X-XZx12356000 mm3
Plastic Section Modulus about Y-YZy3392000 mm3
St. Venant Torsional ConstantJ73257000 mm4
Warping Torsion ConstantCw20462000000000 mm6
Self Weight of sectionWeight463 kg/m

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

A W18X311 steel section is a standard North American steel section in the W - Wide Flange category. It weighs 311 lb/ft and has a cross sectional area of 91.6 in2. The height and width of the section are 22.3 in and 12 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