Mike,
Thanks for the response. I have looked around for plans and can't seem to find what I am looking for. I have found plans for smaller structures that I like, just don't have the knowledge to increase them (i.e. sizing timbers, joinery, etc.) The 30' would be the span (bents), the length would be 50'. I am planning on using Southern Yellow Pine for the wood. Myself and a friend who are trying to get our feet really wet are going to be cutting it together with the help of another friend's Woodmizer. The one pertinent issue is that it have a clear span to use for floor layouts. I really appreciate your help and advice. Please let me know what kind of information I can get together to help this along. Thanks again.