Watering is NOT compaction!
Driving a skidsteer over it is not compaction either.
Jumping jack - Good for about 12"
Plate compactor - Good for about 4"
If you lay down more than that you need a hoe-pac.
I used to do compaction QA for a living, along with growing up working for the family GC business.Split face block, filled with concrete, re-bar both vertical and horizontal. I was thinking of getting them to do 12" block up to the floor level and then switch to three rows of 8" so the floor rest on the block walls. Only concern is if the fill settles, the slab is now tied to the wall and cannot settle without cracking......
Speaking of the fill, the plan is to cut lifts into the dirt around 12" changes, fill with rock and water it down between loads... said they would compact with the large Case skid steer. I am thinking there needs to be more compacting then that...???![]()
Split face block, filled with concrete, re-bar both vertical and horizontal. I was thinking of getting them to do 12" block up to the floor level and then switch to three rows of 8" so the floor rest on the block walls. Only concern is if the fill settles, the slab is now tied to the wall and cannot settle without cracking......
Speaking of the fill, the plan is to cut lifts into the dirt around 12" changes, fill with rock and water it down between loads... said they would compact with the large Case skid steer. I am thinking there needs to be more compacting then that...???![]()
How do you have payment arranged as this goes on?
I still wouldn't have concern with a floor ledge around the perimeter, especially a 4" wide one. Typical here is 2" wide on everything.
As for your fill, you say "rock", which is fine "IF" it truly is stone and stone only. NO FINES. Generally, we use 2-3" fractured stone, as it reaches about 95% compaction as placed w/o compaction. This is an extremely common and acceptable practice in residential, commercial, and industrial construction here. Compacting certainly won't hurt, but you won't gain much.
One last thing. When you mention "cut lifts" I find it a little confusing. Are they planning on pouring footings on virgin soil, and just filling in lifts inside when all the walls are done?
Well... GC showed up today on time and we discussed the issue. Told him I was not happy and why. He said he understood and offered me a full refund. Said he would eat the building permit and the what little sight work labor has already happened. Told me that he already ordered the trusses, but was pretty sure he could get that canceled. Apologized again said that he has been doing this 30 years and never missed eyeballing an elevation this bad.
Long story short, my gut says to trust the guy (hope it doesn't bite me) and told him to proceed with the project. And yes, it is costing me an extra 1500. The fact that he was willing to eat money and time spent and offer a full refund of the deposit did a lot to help me make this decision..... I trusted my gut on this one. So far, that gut feeling rarely let me down. Hope this is not one of those rare times.
As far as how the build is going, the GC said that it will be up to the concrete/foundation guy, as he is the expert. I do know that stepped footers will be poured and split face block will be used to bring up to grade. I don't know what will be used to fill in the 6' elevation, but you can bet your shorts I will find out.


