Re: Ordinary Hazard Attic Spacing

Acute Slopes, wood frame construction,Space the heads every 8' on Branch line and go up to 15' Up the slopeNFPA 13  2013 edtion Fig 8.6.4.1.4 Are you trying to call it Ordinary hazard to get out of this spacing requirements? Attic heads space every 6', and after testing standard spacing 10' 12'

RE: Ordinary Hazard Attic Spacing

Of Roland Huggins Sent: Friday, October 14, 2016 10:05 AM To: sprinklerforum@lists.firesprinkler.org Subject: Re: Ordinary Hazard Attic Spacing A big ole negative on that expectation and other than extra hazard II, this has nothing to do with the classification. Even then it isn't the source

Re: Ordinary Hazard Attic Spacing

A big ole negative on that expectation and other than extra hazard II, this has nothing to do with the classification. Even then it isn’t the source of ignition but more the ignitability (aka flammable liquids). Nonetheless, lets look at this scenario (so when this discussion comes up with a

Re: Ordinary Hazard Attic Spacing

To me, Occupied and Used means 'potential for ignition'. This is not yet part of Hazard Classification, but I think it will be in the future. Friction sparks are high on the list of causes of accidental fires, so I see mechanical equipment in attic spaces, with metal fans rotating at high angular

Re: Ordinary Hazard Attic Spacing

bullseye add NFPA caveat about not being a formal interpretation of NFPA or its technical committees Roland Huggins, PE - VP Engineering American Fire Sprinkler Assn. --- Fire Sprinklers Saves Lives Dallas, TX http://www.firesprinkler.org > On Oct

Re: Ordinary Hazard Attic Spacing

I wouldn't lose any sleep over using light hazard if it's a typical wood truss scenario with an airhandler and ductwork in it. 'Unused attics' are light hazard. Does the presence of HVAC / ductwork make it a 'used attic'? "Used" seems to imply occupants have easy access to, and routinely use, the

Re: Ordinary Hazard Attic Spacing

Bloody funny that it is unintentionally limited to Light Hazard since the concerns that triggered this excessively conservative requirement is no different for an OH. I believe it catches 99.9% of the occurrences (except when ignored that is) The real question is why are you calling it an OH

Re: Ordinary Hazard Attic Spacing

Actually the referenced higher design parameters by 8.6.4.1.4 is not predicted upon being a light hazard or an attic (though that are the conditions when it applies). It is for a concealed combustible space. If the area is accessible and used for storage etc, it no longer is a concealed

RE: Ordinary Hazard Attic Spacing

__ From: Sprinklerforum [mailto:sprinklerforum-boun...@lists.firesprinkler.org] On Behalf Of rongreenman . Sent: Thursday, October 13, 2016 11:50 AM To: sprinklerforum@lists.firesprinkler.org Subject: Re: Ordinary Hazard Attic Spacing Opinion: Attics are light hazard but seem to have become somethi

Re: Ordinary Hazard Attic Spacing

Opinion: Attics are light hazard but seem to have become something between light and ordinary (probably a good thing). So if it's emptyish it's an LH with the attic modifications. If there's stuff in it that makes it OH, it's OH. Kind of like when does a platform used as a stage actually turn into