I don't see this situation clearly enough. I experimented with the Double Hung Window in versions 11, 12 & 13. First of all, I noticed that the 'Stud Wall' option in v11 creates a structure which is called 'Studwall in Siding' later. Then we have the problem of the casings. I don't know what that rectangle between the ganged windows is in v11. Is that needed? In other words: should casing trim offset override casing width in ganging situation or should there be some extra place created for it (i.e. the mystery rectangle in v11)?
I'm really confused about US windows and sorry about that:)
Could you please help me with it?
Thanks,
Zsolt Táskai
ArchiCAD Development - GDL Team
AC13, AC14 and upwards...