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jnblackwood
03-12-2006, 10:49 AM
Building an 18' x 18' Workshop in my backyard. Moore, Oklahoma.

After a visit with the city building inspector, I have told I only need a 10" diameter pier, 24" deep with a vertical #5 rebar down the center at each of the four corners for support.

I was delighted to hear that is all he wanted, but I still plan to add in 12" thick (8" below grade, 4" above) 9" wide footing all around, with #5 rebar reinforcement. The inspector said it wasn't required for local code, but would certainly add strength.

Over the past few days I have completed my grade surveys and marked off where everything will need to go. Today I was 3" from bottoming out my 4th required corner pier when I suddenly discovered the line indicating where the sewer drain was located (as marked by the normal officals) wasn't accurate. Instead of being located 3' west of my future western wall, it clips under where my south west corner by about 2".

Talk about frustration! 3.9 pier holes dug by hand, then bam. I had already made the arrangements for the inspector to come inspect the pier holes for Monday afternoon, and here it is Sunday afternoon and I find this.

My question is:

Can I simply refill this last pier hole that can't be completed due to its proximity to the pvc drain pipe; and redig the pier hole 12-18" eastward (still under the south wall)? Is there a code for how far the pier can be from the corner? Is there a better option? Or am I going to be forced to have to refill all the existing pier holes and relocate the entire building?

Thank you in advance!

James

jnblackwood
03-22-2006, 11:44 AM
Kind of surprised at no feedback, but I figure everyone has been pretty busy lately =)

I chose to dig up the drainline a few yards in each direction and redirect it out from under my future building. It's just 3" PVC, so I thought it would end up being less hassle than relocating the building itself. It worked at any rate, so I'd call it a success.

Cole
03-22-2006, 12:29 PM
I just now saw this post.

Sorry about the no responses.

Rich
03-23-2006, 05:35 AM
I just saw it too - sorry. Anyway - I think you made the right decision. I'll try and be more on top of things :)

Sweep
04-03-2006, 06:44 AM
I just wanted to point out that if 24" is the depth required to avoid frost below the pier (i.e., the deepest recorded frost) and you put a continuous wall around this structure, the wall should also extend down to a depth that would avoid future frost uplift or be designed to reduce the effect of that uplift. What you describe is usually called a grade beam when it is structrual and if it is not low enough to avoid frost uplift the bottom profile is usually formed to make a downward pointing "V" to reduce the effect of uplift.