Good,solid stool like that will last for ages. James.
Herb, that is just basic dimensional lumber from Lowe’s. Probably white pine. They’re plain Jane 2x6x10 boards, $6.30 each. I did go through the stack quite a bit to find several boards with minimal knots and fairly straight. The knots it does have are very small, like pencil eraser sized. There was one or two the size of a dime I couldn’t avoid but they’re strategically hidden in the build, and for the most part I cut around others I didn’t want in it.I like that. Boy you are sure getting some nice knot free lumber Duane, what specie is it? Good job,
Herb