Can you answer this question:

"In the case of retrofit who makes the openings and penetrations. Is that the sprinkler contractor or do you have a drywall guy follow you around and cut and path where you need it. Or box out fr a sprinkler line below the ceiling, who does the firestopping around the penetrations."

Find the article which inspired this question and Paul's original post at:

www.facilitiesnet.com/.../Sprinkler-Retrofits-LifeCycle-Issues--2077