StormCAD-pipes

Hi Nigel,

From element point of view, you have little more options to enter in a manhole Vs a transition. From the hydraulics point both will calculate the headloss. Now, cross-section is a different element generally it represents the geometry of a channel/gutter.

But, when it doubt, match the system out!
So, however system is built, try to model the same way. If you find a manhole in real system, place a manhole.

Here's a quick comparison of Manhole and Transition:

HTH,

If you are simply trying to model a bend in the pipe where the slope changes, you could indeed use the transition node. This is like the manhole, but is enclosed (whereas the manhole has a structure that extends vertically) .

To explain a bit more, the below Support Solution has been logged:

communities.bentley.com/.../12703.cross-section-vs-transition-for-modeling-slope-or-size-change.aspx

If you are simply trying to model a bend in the pipe where the slope changes, you could indeed use the transition node. This is like the manhole, but is enclosed (whereas the manhole has a structure that extends vertically) .

To explain a bit more, the below Support Solution has been logged:

communities.bentley.com/.../12703.cross-section-vs-transition-for-modeling-slope-or-size-change.aspx