Hello. I can help with this, but each member should be asked as a separate question or I can submit an additional service offer to do the entire design
That's fine, but please ask them individually
Hello, I am not a structural engineer. This is not an answer.
The situation is that an engineering project is not a simple question, with a 'just an answer' solution.
It is anengineering project, involving all sorts of complex calculations including seismic calculations depending on which earth quake zone you are in... a project like that will take a structural engineer at least 4 or 5 hours to calculate, then another 3 to 5 hours to produce a CAD drawing so you can build it.
That is why the structural engineer who posted in response wanted to work through an 'additional service' agreement. You can of course take your situation to a local structural engineer. Prices will range sell over $3,000, most likely over $5,000.
None of that complex engineering project can be covered by a simple question and answer...that is why the company has provided the 'additional service' option.
I hope that helps. Good luck with the project.