Guys, I'm on vacation right now, otherwise I would get a picture and post it for everyone. Its been a while since I've seen this area for this project, and the last time I really went down there, they still had the drywall up.
I want to say that really only the bottom chord of the TJI is exposed, with the insulation using the top of the bottom chord as a resting place. This is then followed up with hat track running perpendicular to the TJIs. Benjamin Young On Wed, Nov 23, 2016 at 11:25 AM, Brad Casterline <[email protected]> wrote: > also funny is this could be a case where max deflector for unobstructed > exceeds that for obstructed: > > > > if extends 4.5" below insulation-- obstructed = 10.5" max below insulation > due to 6" max below plane of obstructing member, vs 12" for unobstructed. > > > > you gotta love this stuff > > > > :) brad > > > ------------------------------ > > *From:* Sprinklerforum [mailto:[email protected]. > org] *On Behalf Of *Roland Huggins > *Sent:* Wednesday, November 23, 2016 10:14 AM > *To:* [email protected] > *Subject:* Re: Ceiling of trusses and insulation - Character set not > allowed > > > > ABSOLUTELY. > > > > What is funny is that Unobstructed with structural members less than 3 ft > has a spacing limitation of 130SF. That makes perfect sense for trusses > with a cumulative negative impact on discharge but why should it be 130 sf > for a ceiling with 2x4 stringers? The reason is that after taking 3 cycles > to FINALLY define an actual depth for unobstructed / obstructed, the issue > of spacing has not been revisited - YET. On my list for next cycle (that > being 2022 since we are in the middle of the 2019 cycle). > > > > > > Roland Huggins, PE - VP Engineering > > American Fire Sprinkler Assn. --- Fire Sprinklers Saves Lives > > Dallas, TX > > http://www.firesprinkler.org > > > > > > > > On Nov 23, 2016, at 6:18 AM, Ed Kramer <[email protected]> wrote: > > > > Roland, > > > > If the structural members extended down below the insulation, but no > further than 4”, would you still consider it unobstructed? More than 4” – > obstructed? > > > > Ed Kramer > > Bamford Fire Sprinkler > > > > > > > _______________________________________________ > Sprinklerforum mailing list > [email protected] > http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler. > org > >
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