The sprinkler main riser penetrates a continuous concrete footing through a sonotube sleeve with concrete fill matching the footing width. A cold joint separates the footing pour from the concrete fill, maintaining two inches of minimum clearance all around unless noted otherwise. Reinforcing includes two number five bars at four feet zero inches in length placed near the precast panel pourstrip. Dimensions establish a vertical range of three feet zero inches maximum and one foot six inches minimum from finished grade at the farside down to the footing invert.
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