Roof beam system not mirrored correctly.

[tmccar]

I have a structral beam system on the left for my roof timbers. I have tried to mirror it around the centreline of the roof,  but it is offset as shown. What is causing it to be offset like this?

[indiana_j0nes]

Looks like a join geometry issue? Can You post a 3D view?

[anze.kumar]

See if there are any Start or End Extension values for Structural Framing.

[tmccar]

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@anze.kumar wrote:

See if there are any Start or End Extension values for Structural Framing.

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No, they are both  set to zero

[anze.kumar]

Maybe it's the Mirroring that does the problem. maybe try copying the Strcutural Beam System to the same place and then adjusting Boundary and Angle so it matches your desired geometry.

[ToanDN]

Which one is the original?

[tmccar]

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@ToanDN wrote:

Which one is the original?

The one on the left (the longer one)

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[ToanDN]

Disallow join before mirror it.

[tmccar]

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@ToanDN wrote:

Disallow join before mirror it.

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Do I need to do this on each joist?

[ToanDN]

Yes unless you can group and copy/array them.  And why does the beam not cope properly to the ridge but overlap it?

[tmccar]

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@ToanDN wrote:

Yes unless you can group and copy/array them.  And why does the beam not cope properly to the ridge but overlap it?

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I placed the ridge beam after doing the rafters - I was going to "cut geometry" on each one afterwards to trim them back

[ToanDN]

Can you zoom in the original rafter and select it so I can see its grips?

[tmccar]

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@ToanDN wrote:

Can you zoom in the original rafter and select it so I can see its grips?

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Is this any help? 

[anze.kumar]

Did you try cutting the Beams with reference plane. 
But like solution Toan suggested, you have to cut every beam within the Structural Beam System.

[tmccar]

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@anze.kumar wrote:

Did you try cutting the Beams with reference plane. 
But like solution Toan suggested, you have to cut every beam within the Structural Beam System.

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Ok, I've trimmed all rafters to the ridge board.