I can't remember if 11 had Profile Manager.
I only have back to version 12 on my laptop.
If so that will work if you create a custom profile wall (or beam).
Otherwise you are stuck with lots of single plane roofs.
The only other things I can think of is a maybe trying to put together some primitive shape objects from the library and using Solid Element Operations (if that exists in 11?) or scripting it with GDL if you are able to do that.
Barry.
One of the forum moderators.
Versions 6.5 to 27
i7-10700 @ 2.9Ghz, 32GB ram, GeForce RTX 2060 (6GB), Windows 10
Lenovo Thinkpad - i7-1270P 2.20 GHz, 32GB RAM, Nvidia T550, Windows 11