The foundation of the upright pole is flat and compacted, and the concrete has hardened by ≥ 100mm.
The bottom of the upright pole is equipped with a 50mm thick wooden pad and a standard steel base, which covers ≥ 2 spans of the upright pole; The frame is surrounded by drainage ditches with a width of 200mm and a depth of 150mm, sloping towards the collection well; Install a continuous water barrier of ≥ 100mm on the outer side.
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