Dimensions and section properties for W21X50

Structural sectional properties for a W21X50 standard steel section

steel section diagram

US Customary Units

DescriptionSymbolValue
Shape Category / DesignationTypeW
Section NameNameW21X50
Cross Sectional AreaA14.7 in2
Section Widthb6.53 in
Section Depthd20.8 in
Flange thicknesstf0.535 in
Web thicknesstw0.38 in
Radius of Gyration about X-Xrx8.18 in
Radius of Gyrations about Y-Yry1.3 in
Moment of Inertia about X-XIx984 in4
Moment of Intertia about Y-YIy24.9 in4
Elastic Section Modulus about X-XSx94.5 in3
Elastic Section Modulus about Y-YSy7.64 in3
Plastic Section Modulus about X-XZx110 in3
Plastic Section Modulus about Y-YZy12.2 in3
St. Venant Torsional ConstantJ1.14 in4
Warping Torsion ConstantCw2570 in6
Self Weight of sectionWeight50 lb/ft

Metric Units

DescriptionSymbolValue
Shape Category / DesignationTypeW
Section NameNameW21X50
Cross Sectional AreaA9484 mm2
Section Widthb166 mm
Section Depthd528 mm
Flange thicknesstf13.6 mm
Web thicknesstw9.7 mm
Radius of Gyration about X-Xrx208 mm
Radius of Gyrations about Y-Yry33 mm
Moment of Inertia about X-XIx410000000 mm4
Moment of Intertia about Y-YIy10000000 mm4
Elastic Section Modulus about X-XSx1549000 mm3
Elastic Section Modulus about Y-YSy125000 mm3
Plastic Section Modulus about X-XZx1803000 mm3
Plastic Section Modulus about Y-YZy200000 mm3
St. Venant Torsional ConstantJ475000 mm4
Warping Torsion ConstantCw690000000000 mm6
Self Weight of sectionWeight74 kg/m

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

A W21X50 steel section is a standard North American steel section in the W - Wide Flange category. It weighs 50 lb/ft and has a cross sectional area of 14.7 in2. The height and width of the section are 20.8 in and 6.53 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