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MONTGOMERY COUNTY RESIDENTIAL TYPICAL DECK …
www.montgomerycountymd.govMontgomery County Residential Deck Details Page | 6 04/15/2021 3. DECK FOOTINGS Footings shall be minimum 20 inches square or 22 inches diameter. Bottom of footings shall be a minimum of 30 inches below grade and shall bear on undisturbed soil. Deck footings closer than 5’-0” to an exterior