A herniated disk, sometimes (incorrectly) called a slipped disk, is a common cause of severe back pain and sciatica. A disk in the lumbar area becomes herniated when it ruptures or thins out, and degenerates to the point that the gel within the disk (the nucleus pulposus) pushes outward.
The ceiling fan's downrod must be long enough for the fan's blades to clear the ceiling. A fan with a 12-inch downrod works for a vaulted ceiling with a one-quarter-to one-third-inch pitch. An 18-inch downrod is sufficient for a pitch that is five-twelfths to one-half inch.
A vaulted ceiling requires a ceiling fan with a sufficient downrod, which is the ceiling fan's neck that connects the wall mount to the top of the fan. The correct downrod length depends on the vaulted ceiling's pitch, angle and height.eiling Height. Measuring the distance from the floor to the highest point on the vaulted ceiling helps to determine the ceiling fan size that best accommodates the room. As long as the fan blades clear the ceiling, then the fan's height is a matter of personal choice.