Why is the "Post-Tensioned" check box not visible in the Geometry tab as shown in Tutorial T5 Step 5. In LEAP Bridge Concrete, an adjacent box beam bridge was generated using the ABC interface.

I am trying to model a steel box girder bridge in OpenBridge Modeler. In the Built-Up steel section, I do not see how I can have two inclined webs and two top flanges... How are the steel boxes modeled? Thank you