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How do I cut this roof?

23 ANTWORTEN 23
GELÖST
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Nachricht 1 von 24
ganeagla1
4936 Aufrufe, 23 Antworten

How do I cut this roof?

The roof does not look like that in real life, the portion with the arrow does not exist, the roof just stops at the cut. I've tried cutting the two roofs but it has no effect. Any suggestions?

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Nachricht 2 von 24
ToanDN
als Antwort auf: ganeagla1

Share the model.
Nachricht 3 von 24
barthbradley
als Antwort auf: ganeagla1


@ganeagla1 wrote:

The roof does not look like that in real life

 

I would say not.  I'm talking about the whole design, not just that portion under the rake. It reminds me of Penrose Stairs. I have no idea how you got that Gable over that Hip.  Wild.  Love to see the rvt.   Regarding the portion you want to remove, you could cut it out with a in-place void.  

 

...aren't you missing a ridge? I got a name for your roof: The Escher.  

 

Escher.jpg

Nachricht 4 von 24
SteveKStafford
als Antwort auf: ganeagla1

Join Geometry between roofs will make it easier to edit the roof sketch so one roof can follow their intersection. Another possibility is to use the Vertical Opening tool and cut away the portion of the roof you don't want under the other roof (or in-place void as suggested, though a bit more work). After using a Vertical Opening Revit will probably complain about the Join Geometry, just choose Un-Join. Added a 2018 example.


Steve Stafford
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Nachricht 5 von 24
SteveKStafford
als Antwort auf: SteveKStafford

 It's also possible to do it with one roof sketch and shape editing - see image and example file.


Steve Stafford
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Nachricht 6 von 24
barthbradley
als Antwort auf: SteveKStafford

Nice, but you missed the other gable, @SteveKStafford.   

 

If you can explain what's going on in the picture that the OP posted, I'd appreciate it. It's driving me nuts.  Hence the Escher reference.  

Nachricht 7 von 24
SteveKStafford
als Antwort auf: barthbradley

It just looks like an over frame condition to me. The roof on the left has a low "ridge" that ends at the gable of the right roof. I mocked it up again editing the sketches of the roof and a vertical opening. There is a slight bust where the lateral low ridge hits the gable end because the pitches look like they are different so they won't miter cleanly. If the pitches are the same then they'd clean up like my earlier images. I think the top plate elevation would have to be different to use the same pitch, that or the ridge is offset with the same pitch on one half but a different pitch on the other side?


Steve Stafford
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Nachricht 8 von 24
barthbradley
als Antwort auf: SteveKStafford

Thanks! Now that makes sense!  Good eye!  

Nachricht 9 von 24
SteveKStafford
als Antwort auf: barthbradley

I realized I could get away with much simpler tactics - Join Roof and Dormer Opening. Create both roof sketches but stop the left one from overlapping the right roof. Use Join Roof to project the left roof over on to the right roof. Then use Dormer Opening, pick the right roof (to cut) and the left roof to define the boundary). Pretty quick. I'll attach images here and another post for the example file.


Steve Stafford
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Nachricht 10 von 24
SteveKStafford
als Antwort auf: SteveKStafford

Revit 2018 example project using Join Roof and then Dormer Opening.


Steve Stafford
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Nachricht 11 von 24
Corsten.Au
als Antwort auf: ganeagla1

Hi.

You may try to model in one Roof..

roofroof

Corsten
Building Designer
Nachricht 12 von 24
ganeagla1
als Antwort auf: Corsten.Au

This seemed to work - at least when I put in just generic roof overhangs. I'll try it now with the real roof overhangs. 

 

I had tried this at first but there had not had success yet - there is also one additional roof off that you can't see.

Nachricht 13 von 24
ganeagla1
als Antwort auf: barthbradley

I can assure you it looks like that in real life here is the google image

Nachricht 14 von 24
barthbradley
als Antwort auf: ganeagla1

That's exactly what @SteveKStafford saw too.  I didn't initially.  I stared and stared at your original picture and couldn't make sense of it.  Now I stare and stare at your picture, and I can't see anything but this roof.  Ha!  It's kind of like finding the old lady in this picture. Once you do, you can no longer see the young lady in this picture.  

 

Young or Old Lady.png

 

 

Nachricht 15 von 24
barthbradley
als Antwort auf: ganeagla1

Huh?  I totally confused by the solution.  @SteveKStafford's roofs are literally identical to the roof shown in your photograph.  That's not what you want?  

 

Nachricht 16 von 24
ganeagla1
als Antwort auf: barthbradley

His solution did look correct but I was quickly able to redraw the roof as per ganesh's suggestion and it worked. I did not try to go through the other processes. 

Nachricht 17 von 24
SteveKStafford
als Antwort auf: ganeagla1

I was assuming using two roofs because I couldn't be sure how they overlapped exactly, nor that they used the same pitch or plate height. If they overlap in a compatible way a single sketch can cover it, like the other post showed but his image had the transition on the other side of the ridge from what you showed. This image is closer and one sketch, the same as his example, just with the cut on the other side of the ridge.


Steve Stafford
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Nachricht 18 von 24
ganeagla1
als Antwort auf: SteveKStafford

I see what you mean about the ridge but yes it seemed to work this time. Even when I adjusted the overhangs, once the roof was working I could tweak things a bit and keep it working. I couldn't make the gable at the far end work as all one sketch but that is mostly working by using the join roof tool (the connection between the eaves is a little weird but I was able to play with the rafter cuts to help that out.)

 

Here is the roof now and I believe it is pretty close to real life. 

Nachricht 19 von 24
SteveKStafford
als Antwort auf: ganeagla1

Should be able to clean it up (all one sketch), this is an example of the sketch. The gable end does not slope, just the section along the extension to the right (see the slope triangle symbols). This assumes the roof is using the same pitch throughout and the same plate height. oops...left of the image with the gable at the end too


Steve Stafford
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Nachricht 20 von 24
ganeagla1
als Antwort auf: SteveKStafford

Well you have a hipped roof at the far end rather than a gable but you are right, it did work this time. I had actually tried exactly what you suggested previously, but it did not work. It seems to me the way to make these roofs work is to draw them separately and then when it's close, redraw as one roof. I think if something is a bit off then it just won't make it as one roof the first time.

 

 

Actually after I wrote this I took a look - it solved the problem on one side but created another. Presumably I just need to tweak the overhangs and hopefully this will work...

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