Dimensions and section properties for ST12X40

Structural sectional properties for a ST12X40 standard steel section

steel section diagram

US Customary Units

DescriptionSymbolValue
Shape Category / DesignationTypeST
Section NameNameST12X40
Cross Sectional AreaA11.7 in2
Section Widthb7 in
Section Depthd12 in
Flange thicknesstf0.87 in
Web thicknesstw0.5 in
Radius of Gyration about X-Xrx3.72 in
Radius of Gyrations about Y-Yry1.34 in
Moment of Inertia about X-XIx162 in4
Moment of Intertia about Y-YIy21 in4
Elastic Section Modulus about X-XSx18.6 in3
Elastic Section Modulus about Y-YSy6 in3
Plastic Section Modulus about X-XZx33.6 in3
Plastic Section Modulus about Y-YZy10.4 in3
St. Venant Torsional ConstantJ2.44 in4
Warping Torsion ConstantCw6.94 in6
Self Weight of sectionWeight40 lb/ft

Metric Units

DescriptionSymbolValue
Shape Category / DesignationTypeST
Section NameNameST12X40
Cross Sectional AreaA7548 mm2
Section Widthb178 mm
Section Depthd305 mm
Flange thicknesstf22.1 mm
Web thicknesstw12.7 mm
Radius of Gyration about X-Xrx94 mm
Radius of Gyrations about Y-Yry34 mm
Moment of Inertia about X-XIx67000000 mm4
Moment of Intertia about Y-YIy9000000 mm4
Elastic Section Modulus about X-XSx305000 mm3
Elastic Section Modulus about Y-YSy98000 mm3
Plastic Section Modulus about X-XZx551000 mm3
Plastic Section Modulus about Y-YZy170000 mm3
St. Venant Torsional ConstantJ1016000 mm4
Warping Torsion ConstantCw2000000000 mm6
Self Weight of sectionWeight60 kg/m

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

A ST12X40 steel section is a standard North American steel section in the ST - Standard Tee Sections category. It weighs 40 lb/ft and has a cross sectional area of 11.7 in2. The height and width of the section are 12 in and 7 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