wrote in message
ups.com...
Sorry, let me clarify, monolithic pad that is 4" in middle and has 12"
on the edges.

Maricopa county, Arizona would not issue a permit for your "structure". Nor
would any other building department that I am familiar with. Here if the
structure is more than 150 sq ft of roof and or more than 6 feet tall it
needs to be engineered.

You need to talk to the code enforcement guys in your area. Unless you
really like those swims after the walk down the pier.