Dimensions and section properties for W21X166

Structural sectional properties for a W21X166 standard steel section

steel section diagram

US Customary Units

DescriptionSymbolValue
Shape Category / DesignationTypeW
Section NameNameW21X166
Cross Sectional AreaA48.8 in2
Section Widthb12.4 in
Section Depthd22.5 in
Flange thicknesstf1.36 in
Web thicknesstw0.75 in
Radius of Gyration about X-Xrx9.36 in
Radius of Gyrations about Y-Yry2.99 in
Moment of Inertia about X-XIx4280 in4
Moment of Intertia about Y-YIy435 in4
Elastic Section Modulus about X-XSx380 in3
Elastic Section Modulus about Y-YSy70 in3
Plastic Section Modulus about X-XZx432 in3
Plastic Section Modulus about Y-YZy108 in3
St. Venant Torsional ConstantJ23.6 in4
Warping Torsion ConstantCw48500 in6
Self Weight of sectionWeight166 lb/ft

Metric Units

DescriptionSymbolValue
Shape Category / DesignationTypeW
Section NameNameW21X166
Cross Sectional AreaA31484 mm2
Section Widthb315 mm
Section Depthd572 mm
Flange thicknesstf34.5 mm
Web thicknesstw19.1 mm
Radius of Gyration about X-Xrx238 mm
Radius of Gyrations about Y-Yry76 mm
Moment of Inertia about X-XIx1781000000 mm4
Moment of Intertia about Y-YIy181000000 mm4
Elastic Section Modulus about X-XSx6227000 mm3
Elastic Section Modulus about Y-YSy1147000 mm3
Plastic Section Modulus about X-XZx7079000 mm3
Plastic Section Modulus about Y-YZy1770000 mm3
St. Venant Torsional ConstantJ9823000 mm4
Warping Torsion ConstantCw13024000000000 mm6
Self Weight of sectionWeight247 kg/m

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

A W21X166 steel section is a standard North American steel section in the W - Wide Flange category. It weighs 166 lb/ft and has a cross sectional area of 48.8 in2. The height and width of the section are 22.5 in and 12.4 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