Thursday, April 10, 2008

Interference Check In Revit

Interference, Clash, Collision - all the same thing to Revit...

Here are a few tips to make your life a little easier when using Revit to do an Interference Check within your model.

Create a 3D view called Interference Check.

Set the view to wireframe (optional).

Using Visibility/Graphics, show only the categories of elements that your doing the interference check on, i.e. in the 3D view, only show Walls and structural framing if that's what your checking interference on.

Run the interference tool... Best practice is to choose a limited number of categories at a time, or better yet, "one" category against another. You'll thank me for this unless you like to sort thru lists of thousands of collisions...

Assuming you have some collisions - when you select items (within the Interference Report), they should highlight in red and since you are only showing a limited number of categories in the 3D view, it should be easier to find. You don't have to hit the show button at this point.

As you alternate clicking on the items in question, each should highlight in the current (3D) view. The image below shows how I'm clicking in the Interference Report and the item highlights in the view. As I mentioned above, you shouldn't have to hit "Show" because you're already in a view that should be displaying the items.

You are also given the element ID that can be used to find the element in other views within the model... Also note that you can also get the Element ID of any (or multiple) objects(s).

To search for an item using its element ID, go to the Tools Pulldown and select:

Copy/paste or type in the element ID...

Note: There are a couple gotcha's
  • You can only check the host model against itself, or with (1) linked model.
  • You can't check the host model with more than one linked model, e.g. you can't check the architectural model (walls), with Structural's model (beams & columns) and Mechanical's model (ductwork).
  • You can't check a linked model against a linked model.
  • When you export the Interference Report to HTML, you're given a number for each clash. You are not given the same number when you review the Interference report within Revit.
  • You can't ignore clashes that you know are legit.
  • Once you run thru all the collisions, since you can't ignore clashes, if you run the interference check again in a week, you'll have all the same clashes (that you wanted to ignore), that you'll have to go thru again...

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