I've recently been looking at getting overhead storage racks for my garage which has several standard pendant sprinklers. The racks I am looking at are 4' x 8' and have rigid brackets, vertical posts, horizontal beams and crosshatched wire base. I asked the local installer what the distance requirements are so I can measure and calculate how many racks I would be able to install.
I received a response stating that all I need is 5" horizontal clearance from each rack to each sprinkler. Is this correct? The reason I ask is that this answer regarding light fixture distance from fire sprinklers has a distinctly different answer.
The answer from JayL contains the following:
The residential code says pendant sprinklers must be at least 3 ft from obstructions such as ceiling fans and lights (as measured from their centers)
Does the above apply to storage racks as well? Are they getting by with a technicality where it's within code as long as you don't put anything on the racks, but as soon as you put a storage bin up there it becomes an obstruction and out of code?
Edit: For clarity's sake, the brackets for these racks are mounted to the roof ceiling joists and the vertical posts hang down from the brackets.
Best Answer
You should not store any items within 18" of the ceiling near a sprinkler head. The items can obstruct the water flow of the sprinkler if it goes off.