I have been given a barn that was once used as a blacksmith shop. It is 20'x36'. The beams are 8". Along the lenght of the barn at the top are two beams that are 36' long. On one side where a post and the beam join there is moisture and this white stuff that I'm assuming is mold. I am able to push a screwdriver about a half inch into the wood. My concern is how much damage there will be in the joint when I go to dismantle. The side walls on the barn are about 10' high. Any ideas on setting these two beams down without the use of a crane. I've read about people using a "gin pole" . Could anyone elaborate on that anymore. I already have the foundation poured and really want this barn. I'm trying to dismantle without to much help or cost. Maybe I'm going about it bass ackwards and I really do have a head made of wood! Thanks Woodenhead