Dimensions and section properties for W8X40

Structural sectional properties for a W8X40 standard steel section

steel section diagram

US Customary Units

DescriptionSymbolValue
Shape Category / DesignationTypeW
Section NameNameW8X40
Cross Sectional AreaA11.7 in2
Section Widthb8.07 in
Section Depthd8.25 in
Flange thicknesstf0.56 in
Web thicknesstw0.36 in
Radius of Gyration about X-Xrx3.53 in
Radius of Gyrations about Y-Yry2.04 in
Moment of Inertia about X-XIx146 in4
Moment of Intertia about Y-YIy49.1 in4
Elastic Section Modulus about X-XSx35.5 in3
Elastic Section Modulus about Y-YSy12.2 in3
Plastic Section Modulus about X-XZx39.8 in3
Plastic Section Modulus about Y-YZy18.5 in3
St. Venant Torsional ConstantJ1.12 in4
Warping Torsion ConstantCw726 in6
Self Weight of sectionWeight40 lb/ft

Metric Units

DescriptionSymbolValue
Shape Category / DesignationTypeW
Section NameNameW8X40
Cross Sectional AreaA7548 mm2
Section Widthb205 mm
Section Depthd210 mm
Flange thicknesstf14.2 mm
Web thicknesstw9.1 mm
Radius of Gyration about X-Xrx90 mm
Radius of Gyrations about Y-Yry52 mm
Moment of Inertia about X-XIx61000000 mm4
Moment of Intertia about Y-YIy20000000 mm4
Elastic Section Modulus about X-XSx582000 mm3
Elastic Section Modulus about Y-YSy200000 mm3
Plastic Section Modulus about X-XZx652000 mm3
Plastic Section Modulus about Y-YZy303000 mm3
St. Venant Torsional ConstantJ466000 mm4
Warping Torsion ConstantCw195000000000 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 W8X40 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 8.25 in and 8.07 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