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IRC Requirements for Site Grading

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Hi all,

I have an attorney friend who asked me questions about site graading around a single family residence. (Water in the basement)

Our locale uses IRC 2000. I can't find anything in there about minimum positive drainage away from the structure, but I'd swear there's something in there somewhere.


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It's there. According to my 2000 CodeCheck it was:

IRC 401.3 - Surface graded away from foundation min. 6in/10ft.

IRC 4031.7 - Setbacks & clearances to slopes > 1 vert.: 3 horizon.

IRC 403.1.5 - Lot slope > 1:10-Foundation stepped or level

IRC 403.1.7.3 - Graded site - top of foundation min. 12in + 2% above street drain



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