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Correct cone roof for Heating and Cooling Loads

9 ANTWORTEN 9
GELÖST
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Nachricht 1 von 10
alimoffr
1267 Aufrufe, 9 Antworten

Correct cone roof for Heating and Cooling Loads

Hi.

 

Could anyone tell me how to build correctly cone roof so that it appears in Heating and Cooling Loads -> Details -> Analytical Surfaces?

 

Here is my model:

cone-roof.PNG

 

When I do the same with rectangular model, everything is ok and I can see the roof:

rect-roof.PNG

 

I attach both .rvt files.

9 ANTWORTEN 9
Nachricht 2 von 10
SteveKStafford
als Antwort auf: alimoffr

It's my observation that the roof plane needs to be a uniform slope. I find can create a conical roof, using a 36 segment polygon, and get a valid analytical surface and result. I suppose you could use a thin veneer of a roof (36 sided polygon) to get the underside to allow the calculation and then cover it with the real roof?


Steve Stafford
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Nachricht 3 von 10
Corsten.Au
als Antwort auf: alimoffr

 

Hello

 

Using Massing to Create Conical Roof.

Here are the steps to follow..

 

1.Load Family Mass ( Cone )

2.go to "Mass and Site" and " Place Mass " , and place Cone

cone-5.JPG

3. Use Roof by mass and select the sides of cone..

 

 

 

CONE-1.JPGCONE-2.JPGCONE-3.JPGCONE-4.JPG

 

Cheers!

Corsten
Building Designer
Nachricht 4 von 10
SteveKStafford
als Antwort auf: Corsten.Au

When I compared your technique it was interesting that the values matched those of the 36 sided polygon roof I made. So the mass interpretation produces the same kind of surface for analysis but allows for the smooth roof surface.


Steve Stafford
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Nachricht 5 von 10
alimoffr
als Antwort auf: Corsten.Au

Hi Ganesh. Thank you for the answer. But I think I'm doing something wrong.

 

I created the mass cone:

mass-1.jpg

 

Then I created the roof on this cone:

mass-2.jpg

 

Now I have roof but it's wrong. It looks like a ceiling and one half of it outputs like a roof and the other half outputs like a ceiling (but there is no ceiling at all). Therefore I don't get all the roof area for the Heating and Cooling Loads:

mass-3.jpg

 

Can you tell me what I'm doing wrong?

 

I attach my new .rvt file.

Nachricht 6 von 10
alimoffr
als Antwort auf: SteveKStafford

Hi Steve. Thank you for the answer. Can you please give me a simple example .rvt file with a such roof (I use Revit 2017)?

Nachricht 7 von 10
SteveKStafford
als Antwort auf: alimoffr


@alimoffr wrote:

Can you please give me a simple example .rvt file with a such roof (I use Revit 2017)?


I've attached an example of both the segmented polygon roof and roof by face applied to a mass. The roof by face/mass approach didn't calculate correctly at a pitch of 4:12. It worked when l I made the pitch 5/12. I'm not sure why.


Steve Stafford
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Nachricht 8 von 10
alimoffr
als Antwort auf: SteveKStafford

Wow. That's exactly what I need:

roofs.PNG

 

Can you please explain me the step by step process of creation correct roof with face/mass approach (with screenshots)? I tried to create correct roof using your cone family but I have this result:

roof-my.PNG

Nachricht 9 von 10
ToanDN
als Antwort auf: alimoffr

@alimoffr

 

You need to create 2 half-cone roofs and join them so that they appear as one roof.  With that approach, you can use roofs by footprint as well as roof by face.  They both work, and for any given slopes.  

 

Capture.PNG

 

 

 

 

Nachricht 10 von 10
alimoffr
als Antwort auf: ToanDN

Thank you. I'm finally able to create correct cone roof for Heating and Cooling Loads.

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