George, Providing the information about the ceiling IS outside of your scope. You only have to comply with the rules dependent on the ceiling arrangement. Submittal drawings need only carry a note that to the effect that if the ceiling is not seismically qualified then you will comply with one of the two methods allowed per 13. Or just put the big plate option on then tell the architect that that is what you intend to do because you don't know about the seismic qualities of the ceiling. I'll bet it takes no more than a couple of hours to get the info of what the CEILING GUY intends to do and I'll bet he will intend to brace the grid. This getting us to do all this leg work like making sure the building will hold up the pipes is one of my pet peeves. HELLO!!!! It's not my building. I don't have to put the pipes in, the owner does. He just hired me to do it 'cause he can't/he's lazy/he's got other stuff to do/etc. The pipes weigh what they weigh. I'll tell him how much and I'll even tell him what the point loads will be and find what I consider the best points of attachment to be. That's my job. Whether the building is strong enough to deal with those forces is his and his BUILDING DESIGNER's problem. I'm happy to coordinate but it's HIS building. Same applies to the ceiling. I have enough of a problem hitting center tile per the plans and then getting on site to find that the layout has been turned 90 degrees or started from the opposite end than was on that plan. As to what's meant by head extension I've always read that to mean "drop" and not a "head extender" per se.
On Wed, Jul 21, 2010 at 12:57 PM, George Medina Jr <[email protected]> wrote: > > I have a plan checker requiring me to call out the required T-bar ceiling > grid construction in accordance with ASCE- 7-05 (Sec. 13.5.6.2.2 - 13.6.8.4) > I do not have sections 13.3.1. & 13.3.2 which are referenced in the > aforementioned sections. Does anyone have code sections 13.3.1 & 13.3.2? The > fire sprinkler plan checker had sent me copies from there FPE who happens to > be on vacation for 2 weeks. > I believe the t-bar ceiling call out is outside my scope of work, but upon > further reading There is a requirement for Fire Sprinkle Piping for being in > Seismic Zone 4. Section 13.5.6.2.2 (e.) > States: > "Except where rigid braces are used to limit lateral deflections, sprinkler > heads and other penetrations shall have a 2" oversize ring, sleeve, or > adapter through the ceiling tile to allow for free movement of at least 1 in. > in all horizontal directions. Alternatively, a swing joint that can > accommodate 1 in. of ceiling movement in all horizontal directions is > permitted to be provided at the top of the sprinkler head extension" Does > head extension imply drop? > > How would I determine the Design Strength of Sections 13.6.8.3 - 3 (a.),(b.) > & (c.)? > > I am not Familiar with these code sections, and if there is anyone with > experience in it, your guidance would greatly be appreciated. > > George Medina Jr. > > = > _______________________________________________ > Sprinklerforum mailing list > [email protected] > http://fireball.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: AFT WA 4184/AFL-CIO, SFPE, ASCET, NFPA, AFSA, NFSA AFAA, NIBS, WSAFM, WFC _______________________________________________ Sprinklerforum mailing list [email protected] http://fireball.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)
