Now splitting wood with a chainsaw is the way some folks routinely get D-Shaped logs from a solid log. Yet to achieve the natural flow of the grain and / or you haven't got access, the old-school ways can be used just like our ancestors of old when they crafted wood back in the day... First step is getting a mallet made-up: Once the mallet is ready you can use it with the froe for shingle-making and for aiding the splitting of wood. However for large, thick logs a froe, even a large one will struggle to achieve it. This is where the steel and or wooden / plastic wedges come into play. A steel mallet is also effective. From there you can get stuck in and get splitting the logs into 'D' sections or 'half logs' This was filmed in the remote Rocky Mountain wilderness, no on-grid power, wild bears and hard-core weather etc.