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Thread: How to Keep Sloped Pipe Accurate?

  1. #1
    Member CRapai's Avatar
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    How to Keep Sloped Pipe Accurate?

    Is there a way to keep sloped pipe accurate? Sometimes when I move fittings or pipe around the entire system shifts around a bit. I think this is because Revit doesn't know to automatically move sloped pipe with the slope. Can you lock pipe or fittings in place in Revit so that if a move would cause it to shift you'll get an error? [Edit] DIMENSIONS duurrr

    Any other ways to achieve this?


    I'm in 2015
    thanks.

    [Edit] WOOOOOOOOOOOOOOWWWWWWWWWW! I'm a doofus! Mind still in AutoCAD sometimes.

    Anyways is there other things people do for sloped pipe?

    EDIT 2:
    On a slightly related note, I'm modeling UG storm for a stadium and of course there are 22.5 degree oriented pipe. I found getting rid of the 15, 5, 1 and adding 22.5 snaps helps a ton.
    Last edited by CRapai; November 5th, 2015 at 06:48 PM.

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    Member TFuller's Avatar
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    I think you just need to be aware of what each combination of actions results in either repeat those methods or avoid them. Cutting sections and moving along the pipe's centerline can be a useful method. There's no solid 100% way to say what to do because there are hundreds of ways to get things done. It's easier to give a specific task and then discover the best of the three possible ways it could be done with the most stable results. It's all about "What Revit Wants" and frankly, it's quite a mystery at times.
    tzframpton and Necro99 like this.

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    Member CRapai's Avatar
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    Thanks. I have a question related to this project.

    I'm using cast iron pipe for storm. And I usually draw 45 bend and then click on the plus sign to create a wye. This was working fine with all sizes I was using except for 15". I can draw a 15" bend but I can't change it to a wye. I got these two messages:

    "Can't make type "Tee Sanitary - CI - DWV : Standard"."
    "The converted fitting was not defined in the routing preference. Please assign one on the connected curve types."


    I added the size to my "Segments and Sizes" but it didn't do anything. I looked at the lookup table for the sanitary tee but it only goes up to 8" but the wyes work at 12". I then looked at the bend fitting lookup table and that goes up to 12" but only for 90 degree angle, even though I can make any angle including 22.5 and 45. Do I need to add 15" to that? Why can I still make 15" bends but not change them to wyes?

    I also tried using Some Charlotte families that my Revit manager pointed me to, but they are all coming in at the wrong size and wouldn't change to wyes as well. I think this is because the lookup tables aren't in the folder. I would place them in but my Revit Manager is out at the time and the charlotte family is in our "in progress" folder. If I did get these coming in at the right size would they act the same as the standard fittings? Similar to what I said earlier in this post, "..I usually draw 45 bend and then click on the plus sign to create a wye."
    Last edited by CRapai; November 6th, 2015 at 12:51 PM.

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    Member TFuller's Avatar
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    I think to solve this, you would need to post all the families in question. There are a lot of variables here, the biggest of which is your specific content and how well it's made. If you want to share them, we can see if the problem is reproducible and what might solve it.

    I have an entirely different workflow and content system, so I can't recreate the issue without your content. But I will have a go at it if you share.

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    Member CRapai's Avatar
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    So I talked to the second in command and it seems like I should just be putting in wyes manually, which is a bit of a change for me but I guess I'll get used to it. We do have a 15" wye. The sanitary tee wasn't making them but I think I'll try to make all sizes manually with the why from now on.

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    Forum Addict tzframpton's Avatar
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    Sloped piping is tricky. I've learned to master it and know when moving something can wreck havoc versus be seamless. It's all about trying every way you can think of in moving/splitting/reattaching pipes. A lot of times, I Split pipes, remove fittings, etc... relocate and then use TR to fillet them back together. There's actually a lot of little subtle tricks I've learned throughout the years.

    My point is, it's definitely possible to have a smooth workflow with sloped piping, but you must learn "how" Revit wants you to move and adjust the piping. Lots of Splitting, lots of TR (Trim to Corner, aka "Fillet") and lots of "modeling backwards" and by that I mean instead of starting from the source and modeling forward, learn to start at the ends and work backward... and vice versa depending on. For instance, a sloped 4" sanitary main... what I do is start FROM this main and slope UP back toward a floor drain. This way Revit breaks into the main with a fitting that's slightly rolled and sloping "down" in the direction of gravity. Trying to start at a floor drain and go back to a main is simply.... useless in my opinion. Once everything's connected and things need to shift, you'll learn to Split pipes after fittings to the mains, and adjust and then reconnect manually.

    So keep working it, but don't get frustrated. Learn to try from a different angle when Revit starts doing things you think are unexpected. Hope this helps.

    -TZ

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    Member CRapai's Avatar
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    I'll just keep this thread going. I'm modeling existing storm and they change the slope a lot. I'm having a issue changing the slope. A branch starts out heading 1/2" slope and then changes to 1/8" for the first drain and after. When I try to draw the new slope from the fitting I get, "No auto-route solution was found." When I draw it in as 1/2" and then try to change it to 1/8" I get, "The resulting angle between the segments is too great or too small." I've checked the pipe connector tolerance and it is set to 5 degrees. What's going on here?

    I just tried to draw 1/8" from a wye that is attached to a 1/4" slope and it worked.
    Last edited by CRapai; November 9th, 2015 at 12:03 PM.

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    Member TFuller's Avatar
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    Wow - this is annoying me. I get the branch to change slope, but not the continuation even when enabling "Change Slope."

  9. #9
    Member CRapai's Avatar
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    When I use TR to help replace Wyes it messes with one of the pipes slope a bit. The Wye is slightly different from the sanitary tee.

    Edit one:
    On a side note:
    When you draw a elbow and click on the plus it creates a sanitary tee. This works great with 90 bends but I was also doing it for 45 bends. I ended up switching to manually placing actual wye later. I felt it was slower but I wanted to do things "correctly." The "shortcut" seems like the way things should be. I'm having to go back through a few fittings to make them look normal in our documentation view. What causes a bend to change into a sanitary tee? Can you have the bend point to different fittings based on its angle?

    Edit two:
    Is there a way to set the default size for a reducing wye or tee? When I place a fitting to go from 8" main to a 4" branch I end up with a 8x1-1/2x1-1/2 fitting. I think it would make since to default the continuation of the main as the same size unless specified
    (8x8x1-1/2). Obviously the branch would have to be changed every time.
    Last edited by CRapai; November 11th, 2015 at 02:38 PM.

  10. #10
    Member TFuller's Avatar
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    Quote Originally Posted by CRapai View Post
    Edit two:
    Is there a way to set the default size for a reducing wye or tee? When I place a fitting to go from 8" main to a 4" branch I end up with a 8x1-1/2x1-1/2 fitting. I think it would make since to default the continuation of the main as the same size unless specified
    (8x8x1-1/2). Obviously the branch would have to be changed every time.
    Edit the family and change the default values, then save the family. Reload the family and overwrite the parameters.

    Also, I'd like to point out that using content that can even produce such a non-purchaseable fitting is dangerous. Consider some lookup tables or family type setups instead that prevent you from even being able to create a wye with diameters that cannot be purchased. This is where "design" drawings fail to their utmost. The designer shows objects that flat out do not exist.
    tzframpton likes this.

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