Dimensions and section properties for W21X111

Structural sectional properties for a W21X111 standard steel section

steel section diagram

US Customary Units

DescriptionSymbolValue
Shape Category / DesignationTypeW
Section NameNameW21X111
Cross Sectional AreaA32.6 in2
Section Widthb12.3 in
Section Depthd21.5 in
Flange thicknesstf0.875 in
Web thicknesstw0.55 in
Radius of Gyration about X-Xrx9.05 in
Radius of Gyrations about Y-Yry2.9 in
Moment of Inertia about X-XIx2670 in4
Moment of Intertia about Y-YIy274 in4
Elastic Section Modulus about X-XSx249 in3
Elastic Section Modulus about Y-YSy44.5 in3
Plastic Section Modulus about X-XZx279 in3
Plastic Section Modulus about Y-YZy68.2 in3
St. Venant Torsional ConstantJ6.83 in4
Warping Torsion ConstantCw29200 in6
Self Weight of sectionWeight111 lb/ft

Metric Units

DescriptionSymbolValue
Shape Category / DesignationTypeW
Section NameNameW21X111
Cross Sectional AreaA21032 mm2
Section Widthb312 mm
Section Depthd546 mm
Flange thicknesstf22.2 mm
Web thicknesstw14 mm
Radius of Gyration about X-Xrx230 mm
Radius of Gyrations about Y-Yry74 mm
Moment of Inertia about X-XIx1111000000 mm4
Moment of Intertia about Y-YIy114000000 mm4
Elastic Section Modulus about X-XSx4080000 mm3
Elastic Section Modulus about Y-YSy729000 mm3
Plastic Section Modulus about X-XZx4572000 mm3
Plastic Section Modulus about Y-YZy1118000 mm3
St. Venant Torsional ConstantJ2843000 mm4
Warping Torsion ConstantCw7841000000000 mm6
Self Weight of sectionWeight165 kg/m

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

A W21X111 steel section is a standard North American steel section in the W - Wide Flange category. It weighs 111 lb/ft and has a cross sectional area of 32.6 in2. The height and width of the section are 21.5 in and 12.3 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