To hang your fan where there is an existing fixture but no ceiling joist you can install 2x blocking between ceiling joists or alongside a ceiling joist and then mount the fan box to the blocking.
Install ceiling fan box between joists.
There should be an inscription on the ceiling fan box to indicate this.
Inspect the existing junction box to make sure it s rated for ceiling fans.
Here s the simple steps we followed to install the ceiling mount box.
If it s nailed to a joist pry it free with a flat bar.
A brace between the joists strong enough to support a fan.
The box is usually metal.
Place the open side of the ceiling junction box that came with an expandable brace kit against the ceiling where you want the box installed.
Remove the old electrical box from the ceiling.
Hold a 1 2 inch thick pancake box against the ceiling centered on a joist and trace around it with a pencil.
If it s suspended from a bar you may have to take off a metal plate to unscrew the box.
Or you may need to install a joist hanger bar as shown.
Then pry the bar from the joists.
Cut a 2x4 to this length and attach a new fan rated outlet box to the midpoint using deck screws.
Working in the unfinished attic space above the new fixture location measure the distance between the two nearest ceiling joists.
The family handyman editor in chief gary wentz will show you how to remove an old light and install a ceiling fan brace so you can properly install a new c.
The ends terminate with a circular metal component with spikes that dig into the joists on both ends.
How to install a ceiling fan box between joists.
The new metal ceiling fan box came with a right angle bracket for mounting from the side.
How to install a ceiling fan between joists.
Home ceiling fans need the proper support to be safe for use.
With the 2x4 and box assembled hold them between the joists so the outlet box presses against the back of the ceiling.
If not replace it with a fan rated junction box and a fan brace between the ceiling joist to help support the fan s weight.