Every Revit element has a unique ID number. These numbers can be used to select elements in the model, making it easy to troubleshoot problems that might otherwise be difficult to diagnose.
- [Instructor] This week I want to talk about Revit Element IDs. Now Revit Element IDs are six-digit numbers that uniquely identify each element within your model. Now these are assigned automatically by Revit, and they're unique for every element. Now, to demonstrate I'm in the advanced sample project, that comes with the software. I got there by going to the File menu, Open, and Sample Files, and then I selected Rac Advanced Sample Project. So if you want to follow along with me, I welcome you to open that same project. If you don't have access to that project file, it does come with the software, but if for some reason you don't have access to it, you can open any Revit project and follow along with me.
Okay, so, let's start off with how do we identify an element ID? So, I'm going to select this wall that's facing us right here in the view. And your first instinct might be to look at the Properties palette. So, if I come over here and I scroll through the Properties palette, I'm looking for something that says Element ID, and notice that you're not going to find anything. So, even though that seems like a pretty logical place for the Element ID to be listed, it does not, in fact, show up on the Properties palette.
So, where are we going to access this information? Well, it turns out that if you go to Manage, there is an Inquiry panel, and then there's this icon that looks like a little barcode, and if you click that, that is the ID of the selection. And in this case, it's 150980. Now, while you're in this dialogue, you can actually right-click and copy that number to the clipboard. And the reason you might want to do that is because one of the uses for Element IDs, the most common use for Element IDs, is to use that as a way to select an element.
So, let's say that I wasn't sure where this particular wall was with that unique Element ID, and I want to find it within the view. Well, I can use the button right below the one we just used called Select by ID, and I can right-click here and choose Paste and then click OK, and it will now select that same element. So, once you have the Element ID, you can use it to make a selection, which can be a very useful thing to have. So, that's the basics of an Element ID.
Okay, so, so what? Well, there are times when Revit will display messages and it will refer to particular objects by Element ID. And so, now that you know that once you have that information you can use that to make a selection. If you're not really clear on what Revit's telling you which object it's talking about, then this is a great way for you figure that out. Okay, so, let me demonstrate by going to the Review Warnings dialogue. So, also on the Inquiry panel, there's Review Warnings. And I'm not going to get into a lot of detail on Review Warnings itself because I've talked about that in a previous week's tip.
But I do want to show you that if you expand one of the messages, I'll start with this very first one here, highlighted elements are joined but they don't intersect. That actually has three warnings, and if we expand each of those what you start to see is that in the first two there are some walls that are involved, and in the third one there's some structural framing, but what's important is at the end of the description, in each case is an ID. And that's the Revit Element ID.
So, when I select Basic Wall Exterior Insulation on Masonry, it doesn't seem to show in this particular view, so it's not really very helpful. Now, it turns out that the parapet wall is visible in this view so when I select it it will highlight in orange in the background. So, you certainly can try selecting each object and see what shows up in the view. But in the case where it doesn't highlight, just simply make note of that Element ID. Now, unfortunately, I can't right-click and copy here like I did in the previous window.
So I'll just simply jot that information down on a notepad. Okay, so once I've got that 154427 written down somewhere, I can close this dialogue and use that information to select the object. So I'll go to Select by ID and I'll type in that number, and click OK. Now it turns out that I will see something highlight down there in the corner, but it's kind of far away and hard to see, so what I'm going to do is switch to another view that I think will give me a better look at that. Like the default 3D view here.
And then I'll zoom in on that object. And now it's a lot easier to understand which element that is and also why it's generating a warning. Because if you recall by going back to the Warnings Dialogue, it said that highlighted elements were joined but don't intersect. Well, now it's pretty clear why. When I select Warning One and they both highlight in orange, I can see that, sure, they miss each other altogether. Turns out that's the same problem with Warning Two, even using the same wall, and Warning Three isn't really visible in this view.
So if I wanted to locate where that is, Then I could use those Element IDs to figure that out. But I'm going to show you that with a different Warning, "Highlighted floors overlap". So this is warning number five, and when I select it, again, nothing really highlights in the view. It looks like maybe something is going on right here, but it's not really clear, okay? So, what I'm going to do is make note of both of these Element IDs, 156686 and the other one, 212675.
So I've written both of those numbers down. Now I'm going to go to Select by Element ID, and I'll put in the first one, 156686 and I'll click OK. Now, if I zoom out, may or may not see where the element is. Turns out, oh, there it is right there. Okay, so it's this floor right here. But it's not really clear to me exactly what's going on. So what I want to do instead is, I'm going to deselect it, go back to Select by ID, I'm going to put that same number in, 156686.
But then notice it says use a semicolon for multiple IDs. So I'll put in the semicolon, and I'll put in the other number, 212675, and click OK. That's going to highlight both objects that are participating in that particular warning, and now in order to make it more clear what's going on, I'll go to my little sunglasses here, and choose Isolate Element. That hides everything but the two objects that are in conflict with one another. And now, when I start to zoom in I go, "Oh, I see what's going on." And you can see here that this floor is overlapping this floor.
And now it would be really easy to choose one of these floors, go to Edit Boundary, adjust the sketch, and kind of fix the problem. So, you could see that sometimes these warning messages, they don't really tell you very much information. They just sort of say this object and this object are in conflict. But until you see it with your own eyes, it's a little difficult to tell what's going on. So, selecting by Element ID can be a great way for you to hone in on exactly what the objects are that are in the message and then you can get a much better understanding of what the problem is and how to fix it.
NOTE: The exercise files for this course can only be opened in the most recent version of Revit (Revit 2017).
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