I'm having trouble with Revit constraints. I get the concept, and get how I can lock a wall to a grid line by either align tool and click the lock icon, or adding a permanent dimension and then locking.
Where I'm getting hung up is Revit seems to be constraining things that I have not set constraints to.
example: I'm doing site, grading and driveway work in preparation for using Siteworks. I'm laying down some guidelines for things such as building foot print and driveway/parking area footprint. Where the building footprint and driveway footprint butt against each other, there should be a slight over lap so that Siteworks cleans up the grading points.
I have separate line types for building foot print and driveway footprint, so I can hide each line in view and work on one type at a time.
I’ve aligned the driveway lines to the edge of foundation, and then hide those lines. I then aligned the building footprint lines to the edge of foundation and offset them 3” to the outside to achieve the overlap between the two areas.
When I unhide the driveway lines in view, they have been offset as well. So I hid the building footprint lines, realigned the driveway lines to the foundation, and the building footprint lines get realigned as well, even though they are hidden.
At this point I am not using Siteworks. I have not set any dimensions to these layout lines, and I have not set any constraints during the align command.
I’ve had a similar problem working with walls – a foundation wall on the interior of a building from the slab down to footing somehow was attached to an interior stud wall above it, and exterior stud wall on the left side and a full height concrete foundation wall on the right side. When I tried to re-align the lower foundation wall from one side of the stud wall to the other, all the walls moved, even though I selected only the lower foundation wall. I removed all constraints I could find, and it kept doing it – in any view. I tried several different commands. I finally had to create a foundation plan, select the wall and use the grip on each end to slide it off of each adjacent wall, then align it where I wanted, trim then ends back together, and re-align and constrain the relevant walls to the associated grid.
Can anyone explain how Revit constrains lines/walls that are not constrained? Thanks much in advance. mpp
Solved! Go to Solution.
I hope it helps.
Hi ALfredo. Thanks for the response. I get all of the things that you've listed, but they do not address the issues I having.
To try and simplify, when I'm laying out my site guidelines, I have different line types for driveway, retaining walls, etc. Somehow these lines are getting constrained/joined/associated to one another in the process of trimming/extending/alinging them.
When I move one line, several other lines move along with it that I don't want to move. Even if I hide line category in view that I don't want to move, they still move.
I cannot see anywhere where these different lines are constrained/joined/associated. I did not set up any, and there are none visible to me - at least that I can see.
Does this clarify my issue? Thanks again. mpp
Ok, let me try to simply/clarify further.
I'm drawing different styles of model lines for my site plan and building layout - one for driveway, one for retaining wall, one for building placement, etc.
I am offsetting, trimming, aligning and extending these lines to one another. I am not setting any constraints or joining any line styles (at least not that I am aware of). I have not created any dimensions.
If I move one line using the move command, other lines that are have been trimmed or extended to that line move along with it. I do not want to other lines to move, just the one that I have selected.
Does that make snese?
Revit makes automatic associatiios between lines that are joined at corners. For example, if you make a rectangle and you move one of the lines, the line moves, but you still have a rectangle. If you don't want that to happen, use the Move tool with the Disjoin option active.
Ah, I knew there was something I was missing. That seems to be my issue.
I see how Revit makes associations between lines, and similarly in my other wall scenario. I see that if you use the offset or align command, lines joined at corners still move/extend with it.
Thanks so much! mpp
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