So I gave some thought to a drive through door arrangement in my shop. I don't want to change the building orientation so this is what I came up with:
I think I would frame in for the 3rd door (14ft x 16ft) when built, but would only add the door in the future if I really really need it. I don't want so many OH doors to the point I have no shop wall space.
I don't plan to have semi trucks pulling through this routinely, so I may ultimately not need all the future stone driveway shown.
As far as stone, I have recieved conflicting information from various builders on what to do in terms of stone under the shop/garage slab. Some guys tell me 6 inches of crusher run with fabric, others tell me 1 foot of washed stone without fabric, and other various combinations of fabric & stone...
I would think I'd want stone with fines in it for compaction purposes? Or do the fines hold too much water under the slab?
Here would be the initial stone I would need to get the building up (the structure rectangle shown is 48ft x 96ft):
Here is where I normally buy the stone:
Shelby Stone
And thier current pricing:
They normally deliver in Tri-Axle dump trucks which hold about 25 ton. Last time I had any stone delivered was in 2021 during the COVID crazy prices for everything and it was $380 per truck load. I'd need 15 truck loads if I only went with 6" of stone under the slab, or 20 truck loads if I went with 12" under the slab.
Here are some pics of the last time I worked on part of my driveway:
This is what I normally use for geotextile:
I don't own any vibraory compaction equipment so I'd have to rent one for compacting the stone that will be under the slab.
My thoughts are, I strip the topsoil like I normally do, level out the area and compact the dirt with a heavy dirt roller that I have. Then I use the geotextile under the entire area. I'd cut out the fabric in the areas where the auger would dig for the perma-columns, then put down 6 inches of 2" crusher run and rent a vibratory roller to compact the entire area.
Before I do all that I have to trench for the water & gas that goes under the driveway, as well as trench to extend the coduit for the electrical service. I'd have to do all that before I put down the geotextile. Then there are floor/gutter drop drains if I want them. Not sure how/when I handle those...