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Modeling
About Archicad's design tools, element connections, modeling concepts, etc.

hip rafter slope

David Bearss
Booster
I have never had a problem with this before but for some reason the hip rafter does not match the roof slope. Am I missing some setting somewhere?

capture-20171125-190458.png
David Bearss
Archicad 18/Windows 11
Alienware 17 R5
i7 2.4 GHz / 16 GB ram
5 REPLIES 5
MrC
Advocate
Hi David I am assuming you have created the framing shown? If your'e dealing with a regular hip roof ,my rule of thumb (which your contractor is probably going to use) is to replace the "12" in your roof pitch with "17". So for example,
the angle of your hip rafter, if a 6/12 roof would be 6/17......
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Lingwisyer
Guru
I've never used the rafter object before, but it looks like your hip rafter is the same pitch as your other rafters when it should be a lower pitch dependant on the angle into the hip...

If you're wondering how the "rule of thumb" that MrC has mentioned, 17 is approximately the horizontal distance from corner to ridge on a square roof of 12 from edge to ridge.

Ling.

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Barry Kelly
Moderator
I might be stating the obvious here, but if it is just a rafter object then it will need a "hip" switch parameter that will adjust the roof pitch to suit the hip angle.
If not then you will need to manually set the correct pitch of the hip.

If it is a specific hip rafter object then I am not sure what the problem could be other than the wrong pitch value.

Barry.
One of the forum moderators.
Versions 6.5 to 27
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gpowless
Advocate
Hip rafter objects from the Roof Framing add-on changes pitch when manually stretched in plan view.
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David Bearss
Booster
Well I had created the roof with the multi plane roof tool. I deleted that and created with the single plane tool like I usually do and the hip rafter worked just fine. Go figure.
David Bearss
Archicad 18/Windows 11
Alienware 17 R5
i7 2.4 GHz / 16 GB ram
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