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Migrating NULL structures to Storm and Sanitary Analysis

Migrating NULL structures to Storm and Sanitary Analysis

There does not appear to be a way to migrate NULL structures from Civil 3D to SSA in the same manner as Hydraflow Storm Sewers does, as NONE structures. NULL structures are often bends, wyes and tees, etc., without rim elevations, meant to stay pressurized in surcharged situations. In SSA, NULL structures appear to model as manholes, requiring editing of the max/rim elevation and the max surcharge elevation to keep them pressurized as intended in Civil 3D. Changes to pipe slope and pipe size requires hand editing of these elevations to prevent them from acting like manholes. I suggest that a way is found to bring in NULL structures as its own structure, much as Storm Sewers does. Thank you.

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