I have moved this to 'Working in Archicad" which is a more appropriate section of the forum.
What units are you working in?
5.08 seems to be an odd size to me.
If that is 5 feet or 5 meters then that may be the problem.
Inches might be OK but mm will be very small.
Can't test anything at the moment because I don't have Archicad in front of me.
Or maybe the geometry of your roof just doesn't need these trimmers?
Barry.
One of the forum moderators.
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