I did a spark test and I believe the ones I tested are wrought so I guess I will rig up a screen or magnet to seperate them from the ash. I will have plenty by the time I am done with this so if anyone would like some and is in the neighborhood feel free to let me know, I will be more than willing to share. As for the wood, I am more into metal than wood and by heating with it I am killing two birds with 1 stone. The building has to be gone and it is less wood to cut. If someone wants some I will also share. In my experience with old lumber that I have tried to save is I generally end up burning the pile after a few years of wondering what I'm going to do with it.