Wes,
It cant be done.
Reason is that Sheet metal in Ironcad is about creating parts that can be manufactured by fold/ unfolding in 2- dimensions.
What you are trying to achieve is a 3D dimensional sheet metal part. That is created in another type of process in a shop floor. Don't now the English words for it but that kind of parts are formed with a pressing method rather than being bended in a bending machine.
Say you have created your part successfully in Ironcad, how should that part be manufactured?
With what tool/ machinery I mean.
Picture of Sheet metal bending (2D) machine and a 3D forming tool: