Question concerning CPVC hanger attachment to concrete

[SprinklerDesigner2]

Just because someone else did it doesn't make it the right way to do it.

13R system using CPVC pipe on an existing three story motel that is being totally renovated which includes the installation of a sprinkler system where there wasn't one before.

Except for the roof the construction is non-combustible concrete black with 8" thick reinforced concrete floor slabs.

Where ceiling height is an issue someone wants me to use a strap hanger, similar if not identical to the Tolco #108 Series, but my strong belief is using that hanger to attach to anything but wood would be in violation of its listing because the #10 cap screws are included. My belief is once the cap screws are included they become part of the UL listing.

Am I correct when I say using that hanger with an attachment other than the #10 screws that come with it is in violation of its listing?

 

[cdafd]

I am thinking allowed

I would call the maker and ask the question and go with what they say

 

[stookeyfpe]

My opinion is the use of this hanger would violate its listing. If you look at UL 203 and NFPA 13, typically the only methods for hanging pipe from a concrete structure is to use some form of a expansion hanger or mecahnical insert into a hole that is pre-drilled.

An earlier version of UL 203 I found on the Google machine is attached:

http://www.taylorassociates.com/UL203.pdf

 

[SprinklerDesigner2]

Stookey, exactly what I was looking for. Thanks.

Certainly not all, not even a majority, but it seems a disturbing number of my brethren certified layout technicians are allowing themselves to go pushed into doing things they know, or at least should know, are not right. Just because someone else did it doesn't mean it's right but sometimes try telling that to an owner.

Whenever something like this comes up I give myself a little test by asking "do you think you could find a professional engineer to sign and seal a letter..." and most of the time the answer from myself is no.

The few times the answer was yes I went out and found myself a professional engineer and paid for the analysis, written letter, signature and seal. Once I had this in my file I slept really well for the night.

 

[TravisMack]

SD2:

I always ask myself a similar question in those grey areas:

"Can I truthfully defend my position on the witness stand should a system fail due to my design and cause the loss of life?" If I am not 100% certain, then I do not go down that route. I have lost customers over this, but have also gained a few because they know I will not compromise myself, or put them in a bad position just to make a few $$.

Travis Mack
MFP Design, LLC

http://www.mfpdesign.com