Plumbing codes allow sanitary sewer lines 4" and larger to be sloped at 1/8" per foot if approved by the AHJ. I am trying to design a system using that slope on 4" pipe, while using the 1/4" per foot slope on 3" laterals that connect to the 4" building sewer, but REVIT does not appear to allow more than one slope value on a system. Does anyone have experiance with this?
Believe you're talking about "default" slope. When you start to draw a pipe section, the option for pipe size, etc also includes slope. Manually change it there to whatever slope you prefer for that pipe section. Unfortunately, it is not automatic.
(PS at least NSPC allows 3" and larger at 1/8"/ft).
Thanks. I don't need automatic, just consistent results. About half the time when I connect a lateral at 1/4" per foot to the 1/8" per foot main, REVIT decides that I am screwing up and changes the slope of the downstream section of the main to 1/4" per fott slope too.
To do different slopes, one must start the run-out FROM the main, manually changing the slope as you go out to the drop.
Of course, this implies that the main must already layed out and sized.
Also, Revit has a very difficult time calculating connections on sloped piping. One may have to "draw" piping close enough to the main so that when the drawings print, the piping looks connected. This is especially true for bathroom groups connecting to the main.
As always, Good Luck.
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