Every few summers the news here reports on a porch or deck coming loose sometimes they are close to 100 years in service. Almost always it’s when someone has a party and they get 10 or 15 people out on it. When I was young I rented an old house second floor apartment and the front porch was pulled away an inch from the house. I told the landlord about it and he said nothing wrong with it. I locked the door and never used it. I have no idea if it was ever fixed but when I drive by the porch is still there with people sitting on it.
Yours looks like it was designed by a Frank Lloyd Wright Wanabe.