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Referencing Sheet Confusion

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    Referencing Sheet Confusion

    I'd like to document this issue for other users...

    The Problem:
    Depending on level visibility in a section cut on sheet E602, our "Enlarged Mechanical Plan" view title on the sheet would reference either E602 as referencing sheet (Basement level visible in section cut on E602) or M101 as the referencing sheet (Basement level NOT visible in section cut on E602).

    The user had created an overall basement level mechanical plan (M101) and used callouts to create enlarged plans (M301, M302, etc.) However, the view title we were using required the referencing sheet to be part of the bubble. Because Revit use alphanumeric sequencing on sheet numbers for this parameter, we got E602 instead of M101. We verified this by changing E602 to Z602, and then got the desired M101 in our view title.

    But callouts aren't supposed to work that way, right?


    The user had instead created callouts using the "Reference Other View" process and referenced other scope-box-cropped plans rather than creating true callouts. I placed a true callout on one of the offending sheets and got the correct M101 referencing sheet parameter while the "fake" callout plan still read E602.

    We discovered that the "Reference Other View" method has some interesting behavior.

    I also noted that the level we were hiding in the section view on sheet E602 had a blue datum point. Double-clicking that datum poin took me to a working plan view that was not on any sheet. I deleted that view from our project and then double-clicked the datum point again to see what view it would use.

    This time it went to the first scope-box-cropped-view (not a true callout view, remember) that the user created for the enlarged mechanical plans. What was also interesting is that 3 of the 8 enlarged plans on sheets changed their referencing view to M101, but 5 of the 8 still retained the E602 association.

    Odd stuff since I don't fully understand all the rules in this particular game.

    What makes the visibility of a level in a section cut determine that as a referencing view? I would have expected the first time a plan view of the associated level (Basement) would have driven this behavior - not a section cut. In that case, it would have been something like E101, electrical's first basement plan.

    Additionally, the reason this scope box and "Reference Other View" was process was created was for electrical and mechanical to match the extents of their enlarged plans, which were documented as callouts.

    Create scope boxes. Create true callouts. Set callouts to use the defined scope box.
    No need to copy callout boundary sketch elements or use reference other view.

    It was that simple, but I had never thought to apply a scope box to a callout. I always assumed I had to fudge the callout boundary as close as possible. This streamlined understanding would have allowed me to create scope boxes for a multi-floor hospital and use matching callout boundaries on all floors (maximizing sheet size at enlarged scale) without having to go back to the lower floor and copy the sketch elements of the callout boundary.
    Thomas N Fuller II


    I did some testing in Revit 2018.1 and discovered this behavior...

    Placed a plan view of basement level on sheet A101.
    Placed a section cut on A102 that includes the basement level and the first level.
    Placed another plan view of the basement level on A103.

    The plan view on sheet A103 continues to use A102 as the referencing sheet depending on the basement level's visibility. This is regardless of the discipline setting.

    Why in the world would a plan view reference a section cut?

    I went back and checked some older projects and yes, this is standard behavior. My mechanical plans reference electrical sections because M is after E in the alphabet.

    Where is this a potential problem?

    Any combined discipline project that uses alphanumeric sheet numbering schemes.

    We don't use the referencing sheet parameter often, and if we do, it is for view titles of sections and callouts, but I have to admit this is some odd stuff to me.
    Thomas N Fuller II



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