I think the Ontario airport will have rapid expansion with it coming under local control.  

There is usually supposed to be some play and freedom of movement as with hot and cold weather you will have some flex and expansion occurring.If it's front door then have some off the bottom but need weather stripping to make it air tight and too keep animals out.

@Lisa Gunn , in this particular case, the question isn't how bad the foundation is right now, but how much worse will it become due to swelling and shrinkage of the expansive clay.

Granted, there can always be another 2008, but I'm just curious on your expansion on that. 

First of all, some of them have vacant land that is currently unused and you can factor that in for potential future expansion.

I am not in expansion mode anymore due to personal preference as well as high property costs as well as high interest rates.

What I said was "new campus" meaning large campus expansions or even head quarter moves. 

The exposed aggregate or "honey­ combing" within the concrete is indicative of a "cold­ joint".Without reinforcing steel, the wall was not able to resist the high lateral loads associated with the expansive clay soils, especially saturated soils, prevalent in this area.While not in danger of impending structural failure, this wall should be reinforced, probably with a "Strong-back" system to help maintain structural integrity.

That is a very interesting perspective on the BGV expansion and them persuading the policy on STRs. 

I've seen one job that was done in the winter where the contractor didn't leave a gap for expansion.