Chris Crandall wrote:
Not all locust is the same.

*Black* locust is extraordinarily resistant to critters and rot.
I have never seen it available in plank length, or any other substantial
length.

My girlfriend's house sits in a grove of black locust trees. The
problems with making lumber from them are that they don't grow
especially large in diameter and they rarely grow straight for more than
a few feet. For the most part, they're very twisted, gnarled looking
trees, though they do grow quite tall.