I responded to in the other thread.
"I appreciate all the responses so far.
Hiring a structural engineer was the obvious choice, but I found it to be very costly and overkill. An engineer will not sign off on anything without proper planning and documentations. House plan, floor blueprint, joists specifications, soil analysis, jacks specification, etc. This process will easily cost close to 2K. Where I live, an engineer demand $650 just to start talking with me. Overkill, IMHO.
I don't need a permit from the City, because it is considered non-permanent structure. So, I don't see any reason for a problem with an insurance company. I am not removing any existing structure. I am adding to it. I don't see what could possibly go wrong?
I have a retired friend who used to do this kind of stuff for living, and he educated and guided me through the design.
The reason I posted this here is because I am sure many reefers had the same issue to solve. I was looking for tips, anything I missed, etc."