You would need to concern yourself even with the width of the i-beams to make sure you center a new home (with the same i-beam width) onto the center of your existing piers/pad.The point I'm trying to make is this.

I'm from Arlington so it's one big Beam Pot anyway!

@Matt Pitschman I've been using my laser printer to print out my envelopes for the past few years.

The only thing I hired out was a structural engineer to design new beams for the places I removed bearing walls.The issue is that many jurisdictions require licensed contractors for some trades and require a GC license to pull permits for non-OO properties.

During work hours you Must Stay Laser Focused on Rev Producing Activities (that is NOT what I did on Monday!!!)

There are rules for building a slab foundation vs a pier and beam foundation near a tree as well. 

We put the home under contract within 1 hour of it hitting the market, this house also had multiple cash backup offers on the property Budget - 225-250k, finalizing final numbers with general contractor and subs Blueprints - see attached, laser drawing stage.

It was pier and beam foundation.

What size is the support beams that hold up the carport...will they support the added weight of a moving overhead door, hardware, opener, etc?

Arguably one of the most difficult properties I've ever acquired.Property: 4600 sqft commercial building, clay tile construction w/ solid beams.