Dimensions and section properties for W21X57

Structural sectional properties for a W21X57 standard steel section

steel section diagram

US Customary Units

DescriptionSymbolValue
Shape Category / DesignationTypeW
Section NameNameW21X57
Cross Sectional AreaA16.7 in2
Section Widthb6.56 in
Section Depthd21.1 in
Flange thicknesstf0.65 in
Web thicknesstw0.405 in
Radius of Gyration about X-Xrx8.36 in
Radius of Gyrations about Y-Yry1.35 in
Moment of Inertia about X-XIx1170 in4
Moment of Intertia about Y-YIy30.6 in4
Elastic Section Modulus about X-XSx111 in3
Elastic Section Modulus about Y-YSy9.35 in3
Plastic Section Modulus about X-XZx129 in3
Plastic Section Modulus about Y-YZy14.8 in3
St. Venant Torsional ConstantJ1.77 in4
Warping Torsion ConstantCw3190 in6
Self Weight of sectionWeight57 lb/ft

Metric Units

DescriptionSymbolValue
Shape Category / DesignationTypeW
Section NameNameW21X57
Cross Sectional AreaA10774 mm2
Section Widthb167 mm
Section Depthd536 mm
Flange thicknesstf16.5 mm
Web thicknesstw10.3 mm
Radius of Gyration about X-Xrx212 mm
Radius of Gyrations about Y-Yry34 mm
Moment of Inertia about X-XIx487000000 mm4
Moment of Intertia about Y-YIy13000000 mm4
Elastic Section Modulus about X-XSx1819000 mm3
Elastic Section Modulus about Y-YSy153000 mm3
Plastic Section Modulus about X-XZx2114000 mm3
Plastic Section Modulus about Y-YZy243000 mm3
St. Venant Torsional ConstantJ737000 mm4
Warping Torsion ConstantCw857000000000 mm6
Self Weight of sectionWeight85 kg/m

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

A W21X57 steel section is a standard North American steel section in the W - Wide Flange category. It weighs 57 lb/ft and has a cross sectional area of 16.7 in2. The height and width of the section are 21.1 in and 6.56 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