The diagram shows that the height of the overall tee beam is labeled as “d subscript g”. The tee section shows the following labeled dimensions: “b subscript f” represents the width of the flange, “d subscript T” is the height of the tee section, “t subscript w” indicates the thickness of the web, and “t subscript f” is the thickness of the flange. The bottom tee section is positioned at the vertical distance labeled “h” from the top tee section.
Castellated beam section. Source: Authors' own work