lights in residential
lights in residential
(OP)
So in NFPA 13R
There is mention of distance of a Pendent head from a light
6.4.6.3.4.1 Pendent sprinklers shall be located at least 3 ft (914 mm) from obstructions such as ceiling fans and light fixtures unless the requirements of 6.4.6.3.6 are met.
But it is not in the residential section of NFPA 13 8.10 2013 edition, But it does have the same wording for fans as in 13 R.
any thoughts, or just go with the obtsruction rules in the residential section?
There is mention of distance of a Pendent head from a light
6.4.6.3.4.1 Pendent sprinklers shall be located at least 3 ft (914 mm) from obstructions such as ceiling fans and light fixtures unless the requirements of 6.4.6.3.6 are met.
But it is not in the residential section of NFPA 13 8.10 2013 edition, But it does have the same wording for fans as in 13 R.
any thoughts, or just go with the obtsruction rules in the residential section?





RE: lights in residential
Pretty restrictive.
RE: lights in residential
If the surface mounted light were protected down, it would be a column. So, you could in theory use the 3x rule for surface mounted lights. You either get 4x the distance away, or 36". I try to comply with the beam rule for surface mounted lights, but can easily make an argument for being 3' away from the near side of the surface mounted light.
Similar goes for the fan motor, which is your obstruction to deal with. You need to be 4x away from the edge of the motor, or 3' maximum. Basically, get 3' from the edge of the fan motor housing and you are good.
If you happen to be using standard spray sprinklers, then the fan motor housing does not need to be considered, as it is not a structural member, and you only consider structural members in light and ordinary hazard spaces when using standard spray sprinklers and applying the 3x rule.
Travis Mack
MFP Design, LLC
www.mfpdesign.com
"Follow" us at https://www.facebook.com/pages/MFP-Design-LLC/9221...
RE: lights in residential
RE: lights in residential
Obstruction is the question
In Nfpa 13 R it is addressed specifically
6.4.6.3.4.1 Pendent sprinklers shall be located at least 3 ft (914 mm) from obstructions such as ceiling fans and light fixtures unless the requirements of 6.4.6.3.6 are met.
In NFPA 13 in the residential section there is no wording about lights.
I threw in the fan wording because the exact wording is in both 13 and 13 R, and was just wording that was but in, but not the three feet for the lights???
RE: lights in residential
RE: lights in residential
Again, apply the beam rule if possible, but if it gets to be quite onerous, we may be able to use something else.
Also, that "structural members only" exception is in the section for SSU/SSP only. It does not apply to Ex Cov or Residential sprinklers. I have seen that applied incorrectly on more than a handful of jobs.
Travis Mack
MFP Design, LLC
www.mfpdesign.com
"Follow" us at https://www.facebook.com/pages/MFP-Design-LLC/9221...
RE: lights in residential
Just do not know why they just did not copy the three foot rule over to 13 from 13R and make life a little easier
RE: lights in residential
Travis Mack
MFP Design, LLC
www.mfpdesign.com
"Follow" us at https://www.facebook.com/pages/MFP-Design-LLC/9221...
RE: lights in residential
RE: lights in residential
I was implying that NFPA 13 is about property protection in addition to life safety. I was just trying to point out that many people get the systems confused and think that NFPA 13R is about property protection, when it is not.
Travis Mack
MFP Design, LLC
www.mfpdesign.com
"Follow" us at https://www.facebook.com/pages/MFP-Design-LLC/9221...