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Video instructions and help with filling out and completing What Form 2220 Foundations

Instructions and Help about What Form 2220 Foundations

We're talking today about slab on grade concrete foundations. I'm standing on a concrete slab which is going to become a collector's garage. We're working with MF Architecture here and this 10-car collector's garage has a guest house above. You can follow this project on my Twitter and Instagram accounts using the hashtag Auto House. But let's actually back up two weeks ago as we were just starting to lay the rebar, and I'm going to walk you through the steps of building this concrete slab on grade project. By far, the most common type of foundation here in the south is slab on grade, and there are really two varieties of that. There are post-tension slabs where you have a cable that runs through the slab, and those cables are tensioned at the outside of the slab edges later. So, the slab is in compression. That's not my favorite type of foundation. What we're doing here today is, I think, the best type of slab on grade. This is a steel-reinforced slab. Let me back up a minute and tell you how we got to where we are today. The first step after we've designed the architecture is to get a structural engineer involved. The structural engineer is going to hire a geotechnical engineer who's going to actually do a boring in the soil here and tell us what kind of ground is underneath us. Now, if we're on rock, we're in really good shape. There's not a lot of additional steps for reinforcement needed. But in this case, our soil below us had a high plasticity index, meaning there was some clay soil that may experience some up-and-down movement on this house in the future. So, we had to design a very stiff slab that would resist that...