Can you post a pict of the slab showing the grain, I'm curious what black locust looks like.Working my way through some Black Locust logs a buddy dropped off. Heavy wood. This is the largest of the bunch. My 30 hp tractor wouldn't lift this 7 foot log on the forks, Dropped the forks and wrapped chain around it then lifted back on the arms to get it on the mill.
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28 inches at the butt, the 7 foot log above it produced 192 board feet of 1 inch lumber, and a lag bolt and a clothes line pulley, both totally grown over.
Greg