First I made an arch with a radius of 2048 starting at 0 and ending at 22,5°for the wooden beams, then made 2 others at 2012 and 2084 for the rails. However

This shows the problem better, I need it to follow that exact arch otherwise it won't be modular, I need it to be modular so I can make 22,5 ,45 and 90° bends with a single model copied in hammer.

