My rails are not original. As I said, I was given pieces of the original sides & caps, along with some of the nails. The wood was very light as I recall - not ash I thought. And the nails were all copper. The sides & caps used different length nails. And the nail heads were slightly wider than the body - like a finish nail but smaller. I have no idea how they pounded them into the wood without bending them. The heads on the nails I ended up using were much wider than the original ones.