What’s wrong with this?

Our building codes say that no other system can be touching sprinkler pipes. I don't know if that's local or comes from a different fire or mechanical code.
If you don't have enough slack to get a 1-hole strap on the cable, how about a mineralac or even a mineralac on a long toggle bolt?
 
Electromatic said:
Our building codes say that no other system can be touching sprinkler pipes. I don't know if that's local or comes from a different fire or mechanical code.
If you don't have enough slack to get a 1-hole strap on the cable, how about a mineralac or even a mineralac on a long toggle bolt?
Click to expand...

Yeah, but he was called out first it’s the GC’s fault screw it. But then I guess he got a bend over. I keep getting the work.
 
Irving LaRue said:
View attachment 2578310

Our MC is bumping against the sprinkler man’s pipe. I installed the MC before the pipe was up, but there was a hole for the pipe, so I should have known. I guess you could argue I should have known based off the prints.

Bossman says this is a problem. Superintendent says to re-pull the MC. Foreman says to use a mastic pad so they aren’t touching.

Why is the MC touching a problem? I’ve always just been instructed not to touch other trade’s stuff. Never been given a reason why. Super mentioned something about ferrous metals, but didn’t explain fully. Is there an electrical theory explanation for why my MC can’t touch this pipe? Thanks!
Click to expand...
We were told to never have two dissimilar metals touch because they have what Google states have significantly different electrode potential meaning they have tendencies to corrode or react in the presence if an electrolyte.like water . Can experience galvanic reaction with dissimilar metals. I have observed sprinkler pipe vibrating when fire pumps are running so I would like at least 1" space between all sprinkler lines and wiring methods. One time had a major disagreement with a welder who unscrewed our light bulbs and ran his 6" steam pipe directly over lamp holders then complained he needed lightning In that little room that ceiling was only 7' off floor. Told him Wall Mart had flash lights on sale.
 
infinity said:
The pipe is running vertically in the wall so any appearance of the cable draping over the pipe is an optical illusion.
Click to expand...
I didn't notice that until I took a second look at the OP's picture. The section from NFPA 13 is really aimed at preventing other trades from using the sprinkler pipe as a support. I wouldn't call incidental touching a support, especially if the pipe is running vertically. In the end, this is a discussion with the fire subcode official and it's his call, unless the GC has just decided to get ahead of that process. I'd think you'd be owed a back charge for redoing your work, unless you clearly ignored some previous coordination agreement or you were forewarned to "coordinate work with all other trades" or some such.
 
You must log in or register to reply here.
Top