Diverdan: That's going to be a big beam. I'll see what I can dig up. Will that be supporting a second story and roof load, or just the roof load? 20' is a long span. ~ shao
Diverdan,,Our code here requires a 5 1/8 x 13 1/2" pre chambered gluelam beam for such a task.......Double trimmer at the ends minimum........Hope this helps and be careful,Them dogs are heavy..........
May this new year be kind, and fair to all..........