Yesterday I cleft up a 12 foot oak 2 feet in diameter using just hammers and wedges. It was great fun but hard work.
This tree would normally have been sawn but it was awash with old nails so it would have been scrap if I had not been able to work it this way.
and the final split down to fence rail size
more detail and pics on my blog http://greenwood-carving.blogspot.com/2010/02/cleaving-big-oak-with-hand-tools.html

This tree would normally have been sawn but it was awash with old nails so it would have been scrap if I had not been able to work it this way.


and the final split down to fence rail size

more detail and pics on my blog http://greenwood-carving.blogspot.com/2010/02/cleaving-big-oak-with-hand-tools.html