BIG ASS FANS Basic 6 - Understanding Roof Pitch

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Standard Upper Mount 90-Degree Oset Mount
Understanding roof pitch
To ensure your fan is properly mounted, it must hang plumb to the ground with the upper mount installed using
the bolt holes at the widest locations possible. To accommodate building structures on which the standard upper
mount does not allow the fan to properly orient itself, the 90-Degree Oset mount should be purchased.
The example below shows a situation in which the 90-Degree Oset mount must be used so that the fan hangs
plumb to the ground. If you are uncertain of your roof pitch or do not have the correct mount to properly hang your
fan, consult a structural engineer or contact Big Ass Fans Customer Service.