Thermal Conductivity - k - is used in the Fourier's equation. Thermal Conductivity - k - is the quantity of heat transmitted due to an unit temperature gradient, in unit time under steady conditions in a direction normal to a surface of the unit area. The standard method for specifying an angle is L 2 x 2 x 1/4 - indicating an angle 2 inches deep and wide - and 1/4 inches thick.Thermal conductivities of common metals, metallic elements aand alloys. Properties in imperial units of steel angles with equal legs are indicated below. Dimensions and static parameters of steel angles with equal legs - imperial units. Engineering ToolBox - SketchUp Extension - Online 3D modeling! Add standard and customized parametric components - like flange beams, lumbers, piping, stairs and more - to your Sketchup model with the Engineering ToolBox - SketchUp Extension - enabled for use with older versions of the amazing SketchUp Make and the newer 'up to date' SketchUp Pro.