Originally Posted by
jboggs
A disclaimer - I design machines and steel structures, not houses. But I can tell you this, you are talking about a MAJOR structural change to the integrity of the structure of your humble abode. IF you can confirm that it will meet your local building codes, and IF you can get a local licensed sturctural engineer to design it for you, then you will have a significant and risky construction project on your hands. I would strongly suggest that you do not proceed any further until you find a licensed engineer who is familiar with the codes in your area. Any good local contractor should be able to help you find one.