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thank you for your responses; I will check out that link, hopefully meet with the plan checker, and keep you posted.

I was given a soils report where expansive soils are not a problem, instead the project site is subject to liquefaction (up to 2 inches). The jurisdiction is requiring that we design the foundation as a post-tension slab on grade. Has anybody ever heard of this? I'm not sure how to go about...

I was given a soils report where expansive soils are not a problem, instead the project site is subject to liquefaction. The jurisdiction is requiring that we design the foundation as a post-tension slab on grade. Has anybody ever heard of this? I'm not sure how to go about my design because...

Here's simple: think of when you are using a deck of cards to build a "house" the cards on the sides won't really stay up by themselves until you lay card over them: the top cards would be the "diaphragm". Roof diaphragms typically consists of sheets of plywood over the roof rafters tied...