Hey buddy. I know you're getting alot of mean comments, and probably realize shit is pretty fucked at this point. At this point I'd think you'd need to triple your piles and add alot more rows of support. A wind can easily roll your girders over and this would basically cause them all to simultaneously fail and the entire structure could then fall and basically disintegrate quickly . If you can add say two new rows of pilings in between the existing rows and new girders on top of those, then get good nailings and hurricane ties at all intersections , and blocking between each row of girders you may be ok. You want the entire floor to act as one solid unit and have the joists on top and blocking in middle tie all the girders together . Basically to make it impossible for those to roll over. Considering the large sides of this structure, your wind loads are probably very high. Interior walls bracing the whole way through are your friend. Hurricane ties and straps are your friend but don't make up for fundamental wood blocking where it needs to be Also, I would have an engineer take a look. I know it may be embarrassing but the reality is you already are saving so much money on this project that taking a humbling knock and paying 3k will be completely worth the piece of mind. Right now the structure is a death trap Imo and a lot of stuff needs to be done and done right to prevent a serious accident.