Concrete piers for Shipping Containers
I want to pour some piers as a foundation for two 40' shipping containers. The containers weigh 8800 lbs each, and will be placed side-by-side, but offset 12', so that the central "room" can be 28 x 28 when the interior walls are cut out. There will be additinal weight from drywall and wood stud walls, spray foam insulation, furniture and fixtures,a flat steel wood-framed roof, etc. The soil is very red clay, with some light sand and small pebbles mixed in. This clay layer is about 3-6' deep, covering great slabs of solid rock (typical Missouri Ozarks setup). The land is gently sloped, so some of the uphill dirt has been pushed downhill to level the lot, maybe 3+ feet of fill at the end. It seems to be packed fairly well from the bulldozer, rain, my truck, etc. My question is, how many piers would I need per container (40' x 8') to hold these up, and could I just dig down to undisturbed soil ( which is nearly as hard as rock) or should I continue down to bedrock. If down to bedrock, would I have to drill pins into the rock to keep the piers from sliding off the rock? Any and all comments would be appreciated.
Last edited by Wacky D; 01-10-2007 at 12:27 PM.