Update
v092
Seeing Tuukka freezing to death even though he had a large fire, firewood nearby but couldn't abort the task I've tweaked the split logs to half > quarter > radial change slightly from base 30m to 25m. In actual play with low skills, stone-axe and freezing issues it can go on almost 10 hours. In that time the fire goes out. Currently game mechanics don't allow restarting the task. So if you stop from dying you lose 5-7 hours of work or maybe you die. In reality you would have a partially split log when you restock the fire than resume. This tweak down is to make it less likely you will die doing something you ought to be able to. One could also burn more firewood to begin with, like 200 lbs or more, but this has its own imbalance.
This is meant as a balance with the game mechanics, largely due to the lack of the restart crafting.