The drainage profile is created on the fly by the program the profile will start at the upstream node at its hydraulic center and go from there straight to the pipe connection point then down the pipe to the end or downstream pipe connection point then to the hydraulic center of that node and then onto the next pipe connection point. It continues in that manner to the end of the profile. The width of the node is a determined by where the pipes conncect to the structure and the hydraulic center. So if your pipes connect to each other then there will likely be no width or a single line representing the node.
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