Dimensions and section properties for W18X258

Structural sectional properties for a W18X258 standard steel section

steel section diagram

US Customary Units

DescriptionSymbolValue
Shape Category / DesignationTypeW
Section NameNameW18X258
Cross Sectional AreaA76 in2
Section Widthb11.8 in
Section Depthd21.5 in
Flange thicknesstf2.3 in
Web thicknesstw1.28 in
Radius of Gyration about X-Xrx8.53 in
Radius of Gyrations about Y-Yry2.88 in
Moment of Inertia about X-XIx5510 in4
Moment of Intertia about Y-YIy628 in4
Elastic Section Modulus about X-XSx514 in3
Elastic Section Modulus about Y-YSy107 in3
Plastic Section Modulus about X-XZx611 in3
Plastic Section Modulus about Y-YZy166 in3
St. Venant Torsional ConstantJ103 in4
Warping Torsion ConstantCw57600 in6
Self Weight of sectionWeight258 lb/ft

Metric Units

DescriptionSymbolValue
Shape Category / DesignationTypeW
Section NameNameW18X258
Cross Sectional AreaA49032 mm2
Section Widthb300 mm
Section Depthd546 mm
Flange thicknesstf58.4 mm
Web thicknesstw32.5 mm
Radius of Gyration about X-Xrx217 mm
Radius of Gyrations about Y-Yry73 mm
Moment of Inertia about X-XIx2293000000 mm4
Moment of Intertia about Y-YIy261000000 mm4
Elastic Section Modulus about X-XSx8423000 mm3
Elastic Section Modulus about Y-YSy1753000 mm3
Plastic Section Modulus about X-XZx10012000 mm3
Plastic Section Modulus about Y-YZy2720000 mm3
St. Venant Torsional ConstantJ42872000 mm4
Warping Torsion ConstantCw15468000000000 mm6
Self Weight of sectionWeight384 kg/m

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

A W18X258 steel section is a standard North American steel section in the W - Wide Flange category. It weighs 258 lb/ft and has a cross sectional area of 76 in2. The height and width of the section are 21.5 in and 11.8 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