On Wednesday, May 8, 2019 at 11:36:49 PM UTC-5, Gramps' shop wrote:
I came into three 8/4 walnut slabs today. Moisture meter reads 30%. How long can i expect it to take to get,to 10% or so if I stick stack them outdoors? I am going to see if there is a local kiln service, but I suspect they may want more than the $1.50/bf I paid for this. Like to work these before I forget why I bought them 😜

TWO things:

It all depends on where you live as to how dry they will get. I live in the southern half of Alabama and two stacks of oak (red and white) have been air drying for nearly a year. I just checked them with my moisture meter a couple of days ago - 14% I then checked a kiln dried 2x4 near them, - 14% As I said, "It all depends on where you live."

The other is make sure, make doubly sure, you spray the slabs for powder post beetles. You can get Tim-bor, or something similar. You can put it on with a hand spray bottle. If you do not, again depending on where you live, the beetles will riddle you slabs.