So this is my garage door. Time to get it replaced. As you can see it's made of huge knot free boards. 24" x 96 x 1" to be precise. Really course grain. Don't know what kind of wood. Pine? Spruce? There's a chip board veneer adhered to the exterior. On the off chance it's spruce these could make some great tables. They've been curing in the arid, sunny Denver climate for 50 years.