We use a band scragg on cedar 11" and down to 5" x 6' to 11' long with majority being 8'. Cedar is hard to center properly and takes about as long as loading and sawing. The best was when we were sawing 6" x 8' into 4x4. We sawed 90 logs sorted to 6" in 50 minutes. Load log, center, end dog, through blades, back, rotate 90 degrees, reset blades to 4", back through blades, release end dog, back carriage and reload. All done in 45 seconds. 4x4 stacked, slabs either down belt to hog or through multihead for more lumber recovery.
Many scraggs are 2 bladed with a sharp chain and logs go continuously through the logs. Then through another blade to make a 3 sided cant that goes through another gang of saws. Many variations depending on what is needed out of the logs.