It's one head in a compartment that isn't a compartment so you can use the not-a-small room small room rule or pipe schedule it all by itself }:-) Actually I've successfully argued that it's each is a distinct hazard of similar design and have done a one head calc over the entire area of the most demanding single deck. As to the uppermost deck without eaves I've had some AHJs look at the stupidity of putting a head under nothing and others insist on that head being installed. I think the intent is more to cool the ceiling/structure above the fire than fight the actual fire in the can they should have stated such and since they've provided rules without consideration for calcs or the listing of products they should have just said put the sidewall in to the dimensions they wrote AND install it upside down so it sprays up. They would explain the concern for a fire in a can on a concrete, ground-floor patio and eliminate the concept of a head under an eave that's not there. Maybe a separate water-spray system per 15 would be more appropriate for this application }:-) (Necessary emoticons since ya'll can't see my cheshire cat grin.)
On Wed, Mar 25, 2009 at 7:16 AM, Roland Huggins <[email protected]> wrote: > Interesting that although IBC dictates something beyond the scope and > GUIDANCE of 13R, there is nothing on the design basis for performing > the calculations. We did an informal interpretation on it available > on the database. > > Roland > > On Mar 25, 2009, at 5:26 AM, Tom Duross wrote: > >> I have an existing 4 sty. 13R building, sprinklered, maybe 5 years >> old. 2 >> units/floor. IBC. >> The small existing cantilevered decks (3x10) are being replaced with >> larger >> (6x10) ones. >> They're installing outside decks/balconies to the stairs off the >> sliders >> from the living rooms. >> The stairs will are open and will connect to each deck as a second/ >> third(?) >> means of egress although the stairs serve the back doors now too. >> >> They're asking me to install dry sidewalls to protect the decks/ >> balconies >> but I have a few questions. >> 1. Do I have to also protect the stairs (existing but will connect >> to the >> new decks) if they're open? >> 2. How close to the underside of the deck overhead can I install the >> sidewall? >> 3. What about the top decks that aren't covered? Just place a head >> over it? >> 4. What would you guys design this too? All heads? >> I've got a stack of HVAC closets adjacent to the sliders so I think >> I can >> run the risers there and just tee off on each floor. >> One contractor has already stated a dry pipe standpipe is required, >> I'm not >> sure about that. >> >> This isn't my design, just being asked to quote a sketch. >> I asked how close the decks were going to be to the property line >> thinking >> it might be a protection issue but apparently the building inspector >> has >> signed off on the new decks providing they hire a sprinkie to put in >> the >> heads. >> >> Tom >> >> _______________________________________________ >> 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) >> > > _______________________________________________ > 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 at home.... _______________________________________________ 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)
