Dimensions and section properties for W21X101

Structural sectional properties for a W21X101 standard steel section

steel section diagram

US Customary Units

DescriptionSymbolValue
Shape Category / DesignationTypeW
Section NameNameW21X101
Cross Sectional AreaA29.8 in2
Section Widthb12.3 in
Section Depthd21.4 in
Flange thicknesstf0.8 in
Web thicknesstw0.5 in
Radius of Gyration about X-Xrx9.02 in
Radius of Gyrations about Y-Yry2.89 in
Moment of Inertia about X-XIx2420 in4
Moment of Intertia about Y-YIy248 in4
Elastic Section Modulus about X-XSx227 in3
Elastic Section Modulus about Y-YSy40.3 in3
Plastic Section Modulus about X-XZx253 in3
Plastic Section Modulus about Y-YZy61.7 in3
St. Venant Torsional ConstantJ5.21 in4
Warping Torsion ConstantCw26200 in6
Self Weight of sectionWeight101 lb/ft

Metric Units

DescriptionSymbolValue
Shape Category / DesignationTypeW
Section NameNameW21X101
Cross Sectional AreaA19226 mm2
Section Widthb312 mm
Section Depthd544 mm
Flange thicknesstf20.3 mm
Web thicknesstw12.7 mm
Radius of Gyration about X-Xrx229 mm
Radius of Gyrations about Y-Yry73 mm
Moment of Inertia about X-XIx1007000000 mm4
Moment of Intertia about Y-YIy103000000 mm4
Elastic Section Modulus about X-XSx3720000 mm3
Elastic Section Modulus about Y-YSy660000 mm3
Plastic Section Modulus about X-XZx4146000 mm3
Plastic Section Modulus about Y-YZy1011000 mm3
St. Venant Torsional ConstantJ2169000 mm4
Warping Torsion ConstantCw7036000000000 mm6
Self Weight of sectionWeight150 kg/m

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

A W21X101 steel section is a standard North American steel section in the W - Wide Flange category. It weighs 101 lb/ft and has a cross sectional area of 29.8 in2. The height and width of the section are 21.4 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