High-drain was designed based on high speed finishing of road surface, sidewalk. Set minimum drain depth H min = 0.5 m (calculated from the background seams perfect the clown to the top drain, at the tribute goes on the sidewalk) and H min = 0.6 m (counted from the side of the road to the Summit of perfection, at the location of the crossing the road). The distance between manholes from 20-30 m.
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