Stacked Walls area calculation error

[Anonymous]

There is an error if the area calculation.

If you draw a stacked wall with an unconnected height of 20' and you make it 70' long. Then attach the top to a roof 10' high. 

The area should be 700 SF. But Revit will tell you it is 1400 SF.

This only happens with stacked walls. other walls seem to calculate properly, and if you edit the profile of the wall it seems to calculate properly.

Revit version 2017.2.3 

10.0.1150.0

20171027_0315(x64)

I have not tried this in 2015 or 2016 or 2018

Jeff Rath

Bim Manager

Coover Clark 

[Sahay_R]

This is what I got with 2018

This is also what I got in 2017

[Anonymous]

I created the same exact problem in 2018 my 70'-6" long by 10 high wall has an area of 1400 SF

[Sahay_R]

Your wall is unconnected and not constrained to level 2, which is where my roof was. Compare the differences between your screenshot and mine.

[ToanDN]

I can replicate the behavior if the wall is Unconnected, see the 1st and 2nd screenshots.  To fix it, you need to change the stacked wall to Connected, see screenshot 3.

[Anonymous]

I created the same problem in 2016 as well

[Anonymous]

When I make the wall connected to a height then it calculates to the connected height and not to the roof. 

[Anonymous]

that only works if the level and the roof are the same ... what about a sloped roof .... FAIL

[Anonymous]

Remember this does not fail with other wall types

Jeff Rath

Bim Manager 

Coover Clark

[ToanDN]

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@Anonymous wrote:

When I make the wall connected to a height then it calculates to the connected height and not to the roof. 

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You are correct.  It does sound like a bug.  The only way I can think of is using Edit Profile instead of attaching to Roof.

[Anonymous]

Ya ... I figured out the edit profile part 

But if you move the roof then the wall is wrong ...

[Sahay_R]

I got my results with stacked wall connected to a flat roof.

[Anonymous]

So this is a bug in 16, 17, and 18 ...

Something that needs to be fixed

[ToanDN]

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@Anonymous wrote:

Ya ... I figured out the edit profile part 

But if you move the roof then the wall is wrong ...

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Lock the profile line to the roof plane.

[Anonymous]

This is still a software bug. No solution. Just workarounds.

Autodesk needs to fix this.