Hi @scottjames121
Currently, you can only create this bar geometry by using free form rebar.
The resulting bar will only report the total length and not the individual segment lengths, because it cannot match to a Revit rebar shape.
One way to create it as free form rebar is to use a Dynamo script where you create the lines and then use a free form creation node to which you feed those lines to produce the bar in Revit.
The other way to create the bar in Revit is to use additional geometry and surface distribution free form rebar.
When using this method, free form bars will automatically adjust when making changes to the additional geometry. If the bar is copied with the defining geometry, it will keep it's constraints and react to changes.
Here's an example where I've modeled a triangular extrusion with the desired angle of the standee and selected the host and start surfaces as described below.

For the end segments, I'm using hooks. When using surface distribution free form rebar, the hooks are perpendicular to the host surface, so I must rotate one by 90 deg.

To adjust the hook length, I can either set the desired length for the hook type (standard 90 deg in my case)
OR
i can use the recent 2021 feature of overriding hook lengths by instance.
For this, I need the 00 shape to which the bar is matched to have the hook lengths assigned to some of it's parameters (A, B, C)

For more information see the attached rvt file (saved using Revit 2021).
Ovidiu Paunescu, M.Sc. Str. Eng.
Sr. Product Owner | Autodesk Revit