Dimensions and section properties for W21X73

Structural sectional properties for a W21X73 standard steel section

steel section diagram

US Customary Units

DescriptionSymbolValue
Shape Category / DesignationTypeW
Section NameNameW21X73
Cross Sectional AreaA21.5 in2
Section Widthb8.3 in
Section Depthd21.2 in
Flange thicknesstf0.74 in
Web thicknesstw0.455 in
Radius of Gyration about X-Xrx8.64 in
Radius of Gyrations about Y-Yry1.81 in
Moment of Inertia about X-XIx1600 in4
Moment of Intertia about Y-YIy70.6 in4
Elastic Section Modulus about X-XSx151 in3
Elastic Section Modulus about Y-YSy17 in3
Plastic Section Modulus about X-XZx172 in3
Plastic Section Modulus about Y-YZy26.6 in3
St. Venant Torsional ConstantJ3.02 in4
Warping Torsion ConstantCw7410 in6
Self Weight of sectionWeight73 lb/ft

Metric Units

DescriptionSymbolValue
Shape Category / DesignationTypeW
Section NameNameW21X73
Cross Sectional AreaA13871 mm2
Section Widthb211 mm
Section Depthd538 mm
Flange thicknesstf18.8 mm
Web thicknesstw11.6 mm
Radius of Gyration about X-Xrx219 mm
Radius of Gyrations about Y-Yry46 mm
Moment of Inertia about X-XIx666000000 mm4
Moment of Intertia about Y-YIy29000000 mm4
Elastic Section Modulus about X-XSx2474000 mm3
Elastic Section Modulus about Y-YSy279000 mm3
Plastic Section Modulus about X-XZx2819000 mm3
Plastic Section Modulus about Y-YZy436000 mm3
St. Venant Torsional ConstantJ1257000 mm4
Warping Torsion ConstantCw1990000000000 mm6
Self Weight of sectionWeight109 kg/m

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

A W21X73 steel section is a standard North American steel section in the W - Wide Flange category. It weighs 73 lb/ft and has a cross sectional area of 21.5 in2. The height and width of the section are 21.2 in and 8.3 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