Just a little more concrete last week and now its time for framing. The first thing I did was have a third party inspector come and sign off on the construction of my block stem wall. He personally witnessed the mortar mixture and rebar placement inside. Then I called the City inspector also to sign off on it once it was completed. The reason for the extra stemwall is because the outside wall is the balloon wall and the inside wall supports the load from the upstairs floor joists. The stairs go up in between these two foundation walls and each has its own footing.
When the truck came to fill it up we also had to have the third party “special inspector” on site to take a sample of the mixture that came out of the truck. He packaged it into a small box that he’ll send to a lab for analysis. They test part of it at 7 days and the balance at 28 days for compression strength by putting it in a crushing machine. Inside the stem wall I used 2500 PSI grout mix. I only normally use big rock but this is the only place that its o.k. to use the pea gravel mix. I would never use it in a concrete footing , foundation or driveway. The cost for the 2 trips from the special inspector and the lab test was about 500 bucks. I don’t know what would happen if the lab discovered I got a bad batch from the concrete company, probably make me tear down the wall and start over. I’d rather know now though before I move in that’s for sure!
Next I poured the garage floor. First I rented a compaction machine for the dirt, then put down plastic moisture barrier, topped it with 3-4 inches of manufactured sand and then my #4 rebar 18″ on center tied into the perimeter footing as the plans called for. Once the City came and inspected it we just backed the truck right up to it and poured 7 more yards of 3000 PSI 3/4″ concrete. Once again you’ll see a lot of guys using pea gravel mix but its not nearly as good and tends to crack faster. The larger the rock size in concrete the better. I’m ready for framing now and getting material price quotes from Home Depot, Lowes and Dixieline. Hopefully we’ll be starting on the floor system by mid week if I can get a quick delivery, the framers are anxious and cant wait to get started. I’ll order my custom Milgard windows and exterior doors this week as week so they will arrive about the same time we are done with framing.