I'd like to see that section. Barring a correction from a section that actually says that if you are talking about trade-ups the IBC says you can lower 1 hour requirements to 0. It does not say 0 will achieve 1 hour when sprinklered. Especially when in a LH you only need 30 minutes of water. Yes, yes there are very few buildings with rating requirements and no OH. But I have seen a few gov't buildings where the LH was the driving force on water because no room design method and you can pack a lot of sprinkler in the bathroom/locker/hallway cluster. Last one was 27 or 28 heads in a 3,000 sq.ft. LH design.
Again, I don't know everything show me your cards if you got them. Chris Cahill, PE* Senior Fire Protection Engineer, Aviation & Facilities Group Burns & McDonnell 8201 Norman Center Drive Bloomington, MN 55437 Phone: 952.656.3652 Fax: 952.229.2923 [email protected] www.burnsmcd.com Proud to be one of FORTUNE's 100 Best Companies to Work For *Registered in: MN -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Brad Casterline Sent: Thursday, April 12, 2012 4:52 PM To: [email protected] Subject: RE: glass block floor - 1hr rating There is a section in IBC that, given materials with no fire resistive ratings what so ever, just by sprinklering the building gives them a one hour resistance--- that may be something one could hang their hat on, But, there can no area or height increases taken ALSO. (increased travel dist. is still ok). -----Original Message----- From: Cahill, Christopher [mailto:[email protected]] Sent: Thursday, April 12, 2012 4:41 PM To: [email protected] Subject: RE: glass block floor - 1hr rating I think no way is a little strong. If it's kept wet on the bottom side it will not fail. i.e. Window sprinklers are two hours more because they stopped the test. Data at that point was flat temperatures. Would have lasted longer. Pony wall was because they did get some failing or at least fear of failing when the fire was pushed up right against the glass (see next paragraph) and break occurred before the sprinkler operated? We also know once sprinklers operate the plume temperature go way down even when not putting out the fire. Now how are you going to keep it wet is a fair question. Especially the points between 4 sprinklers. But here's another interesting caveat. I believe all the rated testing is from a fire below. Wonder what the glass will do with the fire on top? I think it's hard to argue the spot right under the fire is going to get wet. But again other forms of construction aren't tested from above so it might not be fair to test this one. Would I put my PE on the line? Probably not, especially for an architect. Not to slam them but I'm not going that far out for others just for a unique design. Looks cool <> my PE. But that's a risk tolerance question, not a physics question. I bet though you will find a lot more PE's than AHJ's that would put their name on it even though the AHJ has limited or no liability. And I bet none of either group are on this forum. Chris Cahill, PE* Senior Fire Protection Engineer, Aviation & Facilities Group Burns & McDonnell 8201 Norman Center Drive Bloomington, MN 55437 Phone: 952.656.3652 Fax: 952.229.2923 [email protected] www.burnsmcd.com Proud to be one of FORTUNE's 100 Best Companies to Work For *Registered in: MN -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of [email protected] Sent: Thursday, April 12, 2012 4:13 PM To: [email protected] Subject: RE: glass block floor - 1hr rating That may be the case but there's no way to substantiate such an equivalency. But hey if someone likes sticking their neck on the chopping block, so be it. Craig L. Prahl, CET Fire Protection CH2MHILL Lockwood Greene 1500 International Drive Spartanburg, SC 29304-0491 Direct - 864.599.4102 Fax - 864.599.8439 CH2MHILL Extension 74102 [email protected] -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Brad Casterline Sent: Thursday, April 12, 2012 5:04 PM To: [email protected] Subject: RE: glass block floor - 1hr rating I am aware of a similar situation where the AHJ accepted the use of Old Style Heads (spray 40% up/60% down) AND bump the occupancy classification from Light Hazard to Ordinary Hazard Group I. -----Original Message----- From: Dewayne Martinez [mailto:[email protected]] Sent: Thursday, April 12, 2012 3:48 PM To: SprinklerFORUM Subject: glass block floor - 1hr rating Have a building where the architect wants to install a glass block floor in lieu of an atrium opening but the floor needs to have a 1 hr rating. Is there anywhere in the IBC/IFC/NFPA code that allows sprinkler protection to provide the 1hr rating? Thanks, Dewayne Martinez Design Build Fire Protection 262-784-7900 (w) 262-784-8401 (f) 414-349-0468 (cell) -------------- next part -------------- An HTML attachment was scrubbed... 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