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Managing compound-element phasing

From: Phasing and Design Options in Revit

Video: Managing compound-element phasing

Certain elements are a little bit more complex than others, and we might consider them Compound Elements. These would include things like Curtain Walls which contain several nested components or objects like roofs and floor slabs which are sketch-based objects that describe more complex shapes. In both cases, you are going to want to consider them a little bit differently when it comes to phasing, particularly when you want to demolish just a portion of the object. So I'm in a file here called Phasing Compound. If I wanted to demolish this entire Curtain Wall, no problem. I could just simply select the Curtain Wall, go over here to the Phasing Properties, and demolish it.

Managing compound-element phasing

Certain elements are a little bit more complex than others, and we might consider them Compound Elements. These would include things like Curtain Walls which contain several nested components or objects like roofs and floor slabs which are sketch-based objects that describe more complex shapes. In both cases, you are going to want to consider them a little bit differently when it comes to phasing, particularly when you want to demolish just a portion of the object. So I'm in a file here called Phasing Compound. If I wanted to demolish this entire Curtain Wall, no problem. I could just simply select the Curtain Wall, go over here to the Phasing Properties, and demolish it.

The trouble as you may recall that the parent object, in this case the parent Curtain Wall, determines the phase parameters of all of the nested subcomponents. So if was only interested in demolishing a portion of this Curtain Wall, like say these two bays over here, then that's not going to work. What I'm going to need to do instead is go through a slightly more complex process to chop out just this portion of the Curtain Wall that I'm interested in. So I'm going to zoom in slightly here. So the first thing I want to do is move my mouse over here to this mullion and tab in to the gridline, and I'm going to use the Add/Remove Segments here to remove this segment right there.

The next thing I'm going to do is select the two mullions down at the bottom here and remove those as well. Now in some cases, they may be pinned like so, so you would just unpin them if that's the case, but in this case it looks like they are not pinned. If you're having any trouble selecting them, you can use the Tab key, and that leaves me with one big panel. Now the next thing I am going to do is use my Tab key to select the panel itself and over here on the Properties palette, I'm going to change that to an Empty System panel.

And what that does is it basically makes a void where those two bays used to be. For the existing construction now, I need to create a little mini Curtain Wall that fills in that location. So I'm going to find that a little easier to do in the Floor Plan. So I'll go back to my First Floor Plan here, and I will create a wall that's using the using the Storefront Curtain Wall, and I'll draw it right there.

Now, it's telling me the highlighted walls overlap, and we're going to remedy that right now. I'm going to select this Curtain Wall here and go back to the 3D--it was 3D Phase 1-- and you could see the reason it was giving me the warning is because it's way tall, so I'm just going to drop that down so that it's only the height of one bay. Now in addition to that, I have got a double mullion here so you might want to clean up a little bit. I'll just Tab in to that mullion, unpin it and remove it, Tab into this Mullion, unpin it and remove it.

So essentially what you're trying to do-- and there is a little bit of fine-tuning that I could do there--but essentially what you're trying to do is make it look like the original Curtain Wall did but make sure that it's created in two pieces, so I now have an overall Curtain Wall that includes these bays and these bays and then a smaller one here that's just that smaller area, and you can probably figure out what we're going to do next. Now that we have this small little Curtain Wall here that's all by itself, we can easily demolish it. To demolish this Curtain Wall, we just do it the same way that we would before, it's created in the Existing Phase, we'll leave that, and maybe we're going to demolish that in New Phase 1.

And you could see now that it dashes in. So now in New Phase 1 or in New Phase 2, we come in, and we draw a new Curtain Wall that maybe looks more like this one that has another door there. So perhaps they wanted to demolish these two window bays and replace them with another door. So when you're all done drawing your new Curtain Wall, it might look something like this. So perhaps the client asked for a second door there in place of those two window panels. That's what we have to do for a Curtain Wall. If you're working with the Floor slab or Roof, it's relatively similar, I'm not going to unnecessarily walk through all of the steps, but I want to take you around to this side over here, and the existing building has this roof here that's all one piece that covers over both portions of the building.

But of course we're demolishing just this portion of the building here, which means we need to demolish part of the Roof. Well, the roof is also a compound object, and you can't demolish part of the roof without demolishing all of the roof. So this is our New Phase 1 here, where the existing roof is showing. If I fast-forward here to New Phase 2, if I spin it around, the solution was to actually create two separate roofs. So you'll have to go into your Roof and copy and paste it on top of itself and then edit the sketch of the roof on the left and remove the portion on the right and edit the sketch of the roof on the right and remove the portion on the left, and then demolish the one half and keep the other half.

And so it's a similar process, but the idea is you can't just demolish part of an object, you either have to demolish the object or not. So when you have a more complex object like a Roof or a Floor or a Curtain Wall, you sometimes have to get clever about the way you approach it in order to assign the proper phasing.

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Phasing and Design Options in Revit

25 video lessons · 3924 viewers

Paul F. Aubin
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