>>1616749Deadfall doesn't need to be broken up very much, let alone sawed. Also, if they have fire then they can use the fire to cut anything. That means building a fire at the base of a tree to burn through the base and fell the tree. Then using fire to cut through sections to make logs. They even used fire to make canoes by burning out everything that isn't a canoe. To fell a tree with fire, you need to remove the bark well above where the fire will be so the flames do not set the bark on fire above the cut.
>>1617203Buck saws are for bucking, not splitting.