Dimensions and section properties for W21X68

Structural sectional properties for a W21X68 standard steel section

steel section diagram

US Customary Units

DescriptionSymbolValue
Shape Category / DesignationTypeW
Section NameNameW21X68
Cross Sectional AreaA20 in2
Section Widthb8.27 in
Section Depthd21.1 in
Flange thicknesstf0.685 in
Web thicknesstw0.43 in
Radius of Gyration about X-Xrx8.6 in
Radius of Gyrations about Y-Yry1.8 in
Moment of Inertia about X-XIx1480 in4
Moment of Intertia about Y-YIy64.7 in4
Elastic Section Modulus about X-XSx140 in3
Elastic Section Modulus about Y-YSy15.7 in3
Plastic Section Modulus about X-XZx160 in3
Plastic Section Modulus about Y-YZy24.4 in3
St. Venant Torsional ConstantJ2.45 in4
Warping Torsion ConstantCw6760 in6
Self Weight of sectionWeight68 lb/ft

Metric Units

DescriptionSymbolValue
Shape Category / DesignationTypeW
Section NameNameW21X68
Cross Sectional AreaA12903 mm2
Section Widthb210 mm
Section Depthd536 mm
Flange thicknesstf17.4 mm
Web thicknesstw10.9 mm
Radius of Gyration about X-Xrx218 mm
Radius of Gyrations about Y-Yry46 mm
Moment of Inertia about X-XIx616000000 mm4
Moment of Intertia about Y-YIy27000000 mm4
Elastic Section Modulus about X-XSx2294000 mm3
Elastic Section Modulus about Y-YSy257000 mm3
Plastic Section Modulus about X-XZx2622000 mm3
Plastic Section Modulus about Y-YZy400000 mm3
St. Venant Torsional ConstantJ1020000 mm4
Warping Torsion ConstantCw1815000000000 mm6
Self Weight of sectionWeight101 kg/m

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

A W21X68 steel section is a standard North American steel section in the W - Wide Flange category. It weighs 68 lb/ft and has a cross sectional area of 20 in2. The height and width of the section are 21.1 in and 8.27 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