Dimensions and section properties for W12X40

Structural sectional properties for a W12X40 standard steel section

steel section diagram

US Customary Units

DescriptionSymbolValue
Shape Category / DesignationTypeW
Section NameNameW12X40
Cross Sectional AreaA11.7 in2
Section Widthb8.01 in
Section Depthd11.9 in
Flange thicknesstf0.515 in
Web thicknesstw0.295 in
Radius of Gyration about X-Xrx5.13 in
Radius of Gyrations about Y-Yry1.94 in
Moment of Inertia about X-XIx307 in4
Moment of Intertia about Y-YIy44.1 in4
Elastic Section Modulus about X-XSx51.5 in3
Elastic Section Modulus about Y-YSy11 in3
Plastic Section Modulus about X-XZx57 in3
Plastic Section Modulus about Y-YZy16.8 in3
St. Venant Torsional ConstantJ0.906 in4
Warping Torsion ConstantCw1440 in6
Self Weight of sectionWeight40 lb/ft

Metric Units

DescriptionSymbolValue
Shape Category / DesignationTypeW
Section NameNameW12X40
Cross Sectional AreaA7548 mm2
Section Widthb203 mm
Section Depthd302 mm
Flange thicknesstf13.1 mm
Web thicknesstw7.5 mm
Radius of Gyration about X-Xrx130 mm
Radius of Gyrations about Y-Yry49 mm
Moment of Inertia about X-XIx128000000 mm4
Moment of Intertia about Y-YIy18000000 mm4
Elastic Section Modulus about X-XSx844000 mm3
Elastic Section Modulus about Y-YSy180000 mm3
Plastic Section Modulus about X-XZx934000 mm3
Plastic Section Modulus about Y-YZy275000 mm3
St. Venant Torsional ConstantJ377000 mm4
Warping Torsion ConstantCw387000000000 mm6
Self Weight of sectionWeight60 kg/m

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

A W12X40 steel section is a standard North American steel section in the W - Wide Flange category. It weighs 40 lb/ft and has a cross sectional area of 11.7 in2. The height and width of the section are 11.9 in and 8.01 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