This is one of the trees I had the task of cutting into firewood lengths. The saw I'm using has a 36 inch bar and as you can see it's just barely making it through the trunk of this tree. I learned a lot about cutting and using wedges. This was a Oak tree and took the better part of a couple hours to make about 10 cuts through the tree trunk. It wasn't all cutting time. The temperature was in the 90s and many breaks were taken.