When the house was built in 1992, the builder ran a 2' wide spread footing down the center of the basement (70' long) but only made it 6" thick. He located colums about every 6' on this footing. He poured a 4" thick unreenforced slab over the footing and the entire floor. From my calculations...
I have to add 2 spread footings to the center of my house, one to hold 9,000 lbs and the other 23,000 lbs. I have a spread footings design using a rebar size I can't get, so I am looking for advice on how to do the footings using 1/2" diameter rebar.
The soil capacity is 3000 psf. The...
