Roof is changing slope mid-roof

[meginL8HXP]

Everyone,

For some unknown reason my roof is changing from a 5/12" slope to a 9/12" slope mid way. I have a complicated roof with dormers and if I eliminate the dormer, the roof model's without issue. Also the eave height has raised at the corner. Any suggestions? I've post a 3D view and how I have it modeled. I'm only defying the slope on the southeast corner (see below)

If I define the slope between the dormers, the eaves are all the same height but I have the weight transisiton from 5/12 slope to 9/12 slope mid-roof.

Any help would be greatly appreciated. I'm going nuts.

Thanks,

Meg

[barthbradley]

You have me scratching my head trying to make sense of what you are describing. Can you post the file?  

...are your eaves not aligned?  You may have an offset from roof base on one or more of your eaves. 

[martijn_pater]

Must be something off with your offset/slope angle settings, does look off though as those are seemingly ok. Zip&add the file...

[georgehobel]

Can you scratch my head while your at it???   if this truly works... that he has found a way to bend a roof mid-span... that would save me a lot of time.

[barthbradley]

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@georgehobel wrote:

Can you scratch my head while your at it???   if this truly works... that he has found a way to bend a roof mid-span... that would save me a lot of time.

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Actually, it can be done through Shape Editing fairly easily.   Obviously, that's not the case here.  I'd love to see the OP's file if he's listening.  @meginL8HXP ?  

[georgehobel]

im lost... how is "shape editing" going to help you scratch my head?   for me... still trudging along with Revit LT.... I dont think I have that option.... :l

[barthbradley]

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@georgehobel wrote:

Can you scratch my head while your at it???   if this truly works... that he has found a way to bend a roof mid-span... that would save me a lot of time.

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[martijn_pater]

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@georgehobel wrote:

that he has found a way to bend a roof mid-span... that would save me a lot of time.

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@georgehobel You can bend mid-span using slope arrows in the sketch. However if you do not define the slopes on both sides of the roof it will redefine the roof slopes at bottom and top since this corresponds to the tail/head of the slope arrows. It is strange in OP's scenario however. Although I feel it is something similar as I'm showing below, but it is difficult/impossible to troubleshoot without (the roof part of) the file.

Roof bend scenario

[meginL8HXP]

@martijn_pater @barthbradley @georgehobel 

Thanks for your input and help. I'm uploading the roof file. When I have all the slopes defined it creates the job in the roof from 5/12 to 9/12 slope. Let me know what you think?

Thanks!

[georgehobel]

and this..... is why I keep coming back... thanks guys... pretty soon I will be good that this.

[georgehobel]

never knew this... thanks...

[meginL8HXP]

@martijn_pater 

Check out the revit file, I didn't add slope arrows mid span and still don't know why it changes mid-span.

Thanks,

Meg

[barthbradley · Accepted solution]

Looks like you broke the rules, so to speak, and Revit worked out a configuration based on the input.  Red circles should be defined slopes.  Blue circle is Revit's brain on drugs. I'm surprised Revit didn't throw a hissy fit upon finishing and closing out of sketch mode. You got lucky.   

Attached is one solution, doing the two smaller eyebrows as separate roofs.  

[meginL8HXP]

@barthbradley 

Awesome! Thank you so much. This did the trick.

Thanks,

Meg

[martijn_pater]

@meginL8HXP Don't have rvt2021 here, so I couldn't open the file sorry. Anyway, glad you worked it out (see post#3 though...)

[ToanDN]

Here is a single roof without the wacky feature.  What you did wrong was splitting the sketch of each dormer into 2.  You don't need to that.  Each dormer should be one segment with 2 sloped arrows of the exact same length.  SO draw the arrow from one end to the mid point of the segment, then mirror it.

See revised file.

[barthbradley]

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@ToanDN wrote:

What you did wrong was splitting the sketch of each dormer into 2. 

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So, what you are saying is that I and the OP got lucky doing 10 eyebrow using a split boundary line?  FWIW: It's been documented both ways.  

Also FWIW, here's a screenshot of your roof which I revised to add the 2 eyebrows you missed and to change the slopes to match the ones the OP used.  

Weird, huh?   

[ToanDN]

I purposely left the last two out because I knew you would get your hand to it.  Still you revised it wrong even I had laid out all the steps to get it done correctly.

[barthbradley]

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@ToanDN wrote:

I purposely left the last two out because I knew you would get your hand to it. 

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Sure I would. I love these challenges.  

Okay, so I see the 2 additional eyebrows standing tall and proud, but what about the 5/12 slopes?  

[ToanDN]

Good catch.