Determine Your Placement
First you need to determine which way the joists in your ceiling are running. For the easiest installation, you should install your beams parallel to your joists. This is because the strapping under the drywall will be running in the opposite direction from the joists, so this will give you something to screw your beams into every 16 inches for a secure hold.
The number of beams you need really depends on the size of your space and the look you are going for. For this project, we installed the beams 4 feet apart from each other and they are just under 10 inches wide, which resulted in 4 beams in total.
Using a straight edge, such as a level, draw lines on your ceiling where you want your beams to go. Be sure to also mark the spots where the strapping is located, so you know where to screw your boards into.