I think this whole facade could have been done using the Curtain Wall Tool because
1. The Curtain Wall can be freely rotated in 3D to any position you wish
2. The boundary of the polygon can be formed into any shape you wish, you can even place holes in it like a slab polygon or any other polygonal stuff in AC (except for Polygonal Walls).
3. There are 3 main directions for Frames: the angle between two of them can be specified (e.g. one is horizontal, the other is sloped), then the Frame of the 3rd main direction can be placed or added to the Curtain Wall as additional Frames, then copy-dragged/multiplied.
Loving Archicad since 1995 - Find Archicad Tips at x.com/laszlonagy
AMD Ryzen9 5900X CPU, 64 GB RAM 3600 MHz, Nvidia GTX 1060 6GB, 500 GB NVMe SSD
2x28" (2560x1440), Windows 10 PRO ENG, Ac20-Ac28