Justin, Once again it's the rules. Less than 55 sqft no head, more than 55 sqft then a head. Separate a compartment (don't worry about what rooms are called, worry about there function--I can call a 50 sqft walk-in closet a bathroom but with closet poles and no bathroom fixtures it's ain't a bathroom) with an 8" lintel and it's two compartments. If the compartment happens to be a 56 sqft bathroom then it becomes two bathrooms less than 55 sqft. Separate it with a full height door and it doesn't. Now about the engineering.... Prescriptive codes are compromises designed to cover the most common situations the most often. I know you know this but we all get caught up in some complexity far too often and forget that simple fact. Just a reminder that the rules be the rules and that's all. Remember that it's illegal to carry a concealed sword over six feet long in Seattle. 5'' 11" is OK. Still doesn't make a lot of sense.
On Tue, Aug 11, 2009 at 12:46 PM, Sprinkler Forum<[email protected]> wrote: > Residential highrise. The door goes full height (maybe half inch > clearance on the top). The frame is recessed in the hard lid ceiling. > > Your take is that without the lintel, the bathroom is part of the > larger bathroom it is connected to and since the aggregate of that > area is over 55 sf that the head must be included. In the small > bathroom. > > But, do you agree that the 8 inch lintel is a detriment if you > consider a fire in the bathroom? > > Since we should not even consider a fire in the bathroom( low > probability, size etc. ) then the question is... does the absence of > the lintel hinder the activation of heads when we consider a fire in > the adjoining space? This could be due to the additional volume of the > 55sf bathroom needing to fill and may slightly delay the operation of > the heads in the sprinklered space. I would guess that due to the > small volume of the non-sprinklered space that the delay would be small. > > I think I will have to do some fire modeling to make this point to our > inspector. I will share the results when complete. > > Thanks for all of the input. > > Justin D. Reid, P.E. > RLH Fire Protection > 16735 Saticoy St. #110 > Van Nuys, CA 91406 > 213-798-0251 > > Sent from my iPhone > > On Aug 11, 2009, at 10:33 AM, "Dave Phelan" <[email protected]> wrote: > >> Sorry - meant to add one other item .... >> >> Not knowing the occupancy of the building but sounds like >> residential - the >> bathroom exception applies within the dwelling unit. Does this >> lintel-less >> space open into a public corridor or public area? Wouldn't we be >> suppressing this public bathroom then anyway ? >> >> If it is single family 13D type system then I might be more inclined >> to >> allow the head to be omitted under the 55Ft2 rule - is there some >> technical >> difficulty with providing a lintel - even decorative- anyway? I can't >> imagine this door is a full height frameless clear glass door but >> then again >> I don't know much about architecture !! >> >> >> >> _______________________________________________ >> Sprinklerforum mailing list >> http://lists.firesprinkler.org/mailman/listinfo/sprinklerforum >> For Technical Assistance, send an email to: [email protected] >> >> To Unsubscribe, send an email to:Sprinklerforum- >> [email protected] >> (Put the word unsubscribe in the subject field) > > _______________________________________________ > Sprinklerforum mailing list > http://lists.firesprinkler.org/mailman/listinfo/sprinklerforum > For Technical Assistance, send an email to: [email protected] > > To Unsubscribe, send an email to:[email protected] > (Put the word unsubscribe in the subject field) > -- Ron Greenman Instructor Fire Protection Engineering Bates Technical College Tacoma, WA Member: SFPE, ASCET, NFPA, AFSA, NFSA AFAA _______________________________________________ Sprinklerforum mailing list http://lists.firesprinkler.org/mailman/listinfo/sprinklerforum For Technical Assistance, send an email to: [email protected] To Unsubscribe, send an email to:[email protected] (Put the word unsubscribe in the subject field)
