Arlington's Mounting Box
The FB90 Fan/Fixture Mounting Box offers the easiest, most secure way to center mount a fan or fixture on a cathedral ceiling. Installers can attach the box to a 2x4 about 12-inches long. They can also nail or screw the 2x4 box assembly to the pitched rafters, centering the box on the ceiling. The box supports fans or fixtures in excess of 35 pounds. Arlington Industries