Dimensions and section properties for W21X48

Structural sectional properties for a W21X48 standard steel section

steel section diagram

US Customary Units

DescriptionSymbolValue
Shape Category / DesignationTypeW
Section NameNameW21X48
Cross Sectional AreaA14.1 in2
Section Widthb8.14 in
Section Depthd20.6 in
Flange thicknesstf0.43 in
Web thicknesstw0.35 in
Radius of Gyration about X-Xrx8.24 in
Radius of Gyrations about Y-Yry1.66 in
Moment of Inertia about X-XIx959 in4
Moment of Intertia about Y-YIy38.7 in4
Elastic Section Modulus about X-XSx93 in3
Elastic Section Modulus about Y-YSy9.52 in3
Plastic Section Modulus about X-XZx107 in3
Plastic Section Modulus about Y-YZy14.9 in3
St. Venant Torsional ConstantJ0.803 in4
Warping Torsion ConstantCw3950 in6
Self Weight of sectionWeight48 lb/ft

Metric Units

DescriptionSymbolValue
Shape Category / DesignationTypeW
Section NameNameW21X48
Cross Sectional AreaA9097 mm2
Section Widthb207 mm
Section Depthd523 mm
Flange thicknesstf10.9 mm
Web thicknesstw8.9 mm
Radius of Gyration about X-Xrx209 mm
Radius of Gyrations about Y-Yry42 mm
Moment of Inertia about X-XIx399000000 mm4
Moment of Intertia about Y-YIy16000000 mm4
Elastic Section Modulus about X-XSx1524000 mm3
Elastic Section Modulus about Y-YSy156000 mm3
Plastic Section Modulus about X-XZx1753000 mm3
Plastic Section Modulus about Y-YZy244000 mm3
St. Venant Torsional ConstantJ334000 mm4
Warping Torsion ConstantCw1061000000000 mm6
Self Weight of sectionWeight71 kg/m

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

A W21X48 steel section is a standard North American steel section in the W - Wide Flange category. It weighs 48 lb/ft and has a cross sectional area of 14.1 in2. The height and width of the section are 20.6 in and 8.14 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