I want to hang n fan in a covered pavilion which has a gazebo like roof, held up by rafters. I've purchased a ceiling fan box/support that is designed to fit between joists, but there are no joists. I was wondering if I could use 2 stacked 2x4's attached perpendicular to the rafters (with lag bolts) and then connect the fan box between the two by fours.
This photo shows the roof rafters and the drawing indicates the idea. The other photos show a mock-up of what it would look like (ignore the clamp, it is just holding the mock-up together -- in the application the 2x4's would be attached to the rafter with bolts).
Basically, the 2x4's create a 'joist' for the fan box to attach to. (The plates on the end of the fan box are aligned so that they can only be attached on the ends, and not flat against the joists).
Will this work? Or is there another way to do it?