Sprinklers near pitched roof peak

[rrewis]

Hello, this is my first post so please bear with me. My question is concerning NFPA13 2002 edition section 8.6.4.1.4.2. In it is stated that a sprinkler under a roof with a roof pitch exceeding 4/12 shall be positioned within 12" horizontally of the peak. The figure 8.6.4.1.4 details the sprinkler at what amounts to be 6" from the peak. One of these appears to me to be a typo and if so, which one?
I've searched the archives but could find nothing. Will someone please offer some input.

Thanks,
Russell Rewis

 

[cdafd]

appears not more than one foot down from the peak and apears can go to either side horizonatlly as long as you are with in six inches on either side of the peak.

Not sure if that sounds right.

You also may want to look at the listing of the head, and look at hip sprinklers

http://www.tyco-fire.com/index.php?P=show&id=TFP610_10_2005&B=&BK=product&SB=S6

 

[TravisMack]

Russell:

I see where your confusion comes from. I have always gone with the figure, and placed heads within 6" horizontally of the peak.

And, welcome to Eng-Tips. I have seen your postings on the AFSA forum and look forward to your participation here as well.

T

 

[rrewis]

Thanks for taking the time to respond CDAFD and TravisMark. That sounds like a good interpretation of the paragragh to me.
Thanks for the warm reception to the forum. I had to leave the AFSA forum because there was a couple of members that would get quite rude when they became bored or uninterested with a particular thread. Possibly I'm just a little too thin skinned.

Thanks again,
Russell

 

[TravisMack]

Russell,

This seems to be a good cross section of opinions here on the fire sprinkler portion of this site. You also get experience from the engineering side as well as the contracting side. It is good to get both sides of the equation at times.

Stookey is the resident I-codes expert. I guess if you work for the ICC you should be pretty well versed in them

SprinklerDesigner2 brings almost as much experience in sprinkler design as time I have been on this earth.

There are several PEs that have varying areas of expertise from whom I have learned a lot.

Then, I am just the resident NICET IV flunkie

Take care...

Merry CHRISTmas to everyone!!!

Travis

 

[SprinklerDesigner2]

Merry Christmas everyone. Go ahead, leave the office early and finish up your shopping.

I agree with everyone who voiced an opinion. 1 to 12 inches down and up to 6" either side horizontally from the peak.

 

[stookeyfpe]

Travis

Your still my hero. You've kept me honest, I've reviewed your plans, and your a darn good design professional. Soon you'll be a Texan. NICET certified designers play well with others (generally) and are out to make the design safe, proper and economical.

Rrewis, welcome to the arena. We play nice, leave our emotions at home, and most of all, we try to provide some reasonable answers. It is a nice play to bounce ideas around.

CDA and SprinklerDesigner2 are great guys and avoid pontificating in their replies. I previously have had electronic words with them but they know I am from Texas so they know we can sometimes be full of crap - Travis and SD2 make me open the code book and I love folks who focus on the requirements, rather than our interpretations.

Remember this: codes and standards are technical documents written in a political environment. They are written by people - people make mistakes. Add politics and you now have Jello mixed with Garlic. Not a great flavor but you will taste the difference.

Welcome, and happy holidays.

 

[rrewis]

I came by this forum by searching the web for "NFPA forums" and I feel I've found the right one. I got into this business when I was in high school back in 1964 (guess I just let my age out). I've put in 22 years, but not all at one stretch and have atttained a Nicet IV in design and level I in Special Hazards (which is as high as I can go due to the lack of available projects to get the required experience) because I'm located in deep south Georgia and the projects we see here are not very diverse. I may ask some "Duh" questions from time to time but I like to have the opinions of others because at the time I started you carried the NFPA13 standard in your back pocket and was no thicker than a check book! Ahh, the simple life. The standard has changed so much and as of late so quickly that it's difficult for an old man as myself to keep abreast of the contents. Oh, well, that's probably more info than you care to hear so I'll just wish all a pleasant holiday season.
Russell

 

[SprinklerDesigner2]

"deep south Georgia"?

That makes two of us and here I thought I was the only one wothin 50 miles of Florida.

I started designing sprinkler systems in the mid 70's, have a NICET IV in sprinklers.

In the mid 70's NFPA #13 was a little thicker then a checkbook but I do have a copy of NFPA #13 from 1932 that I have been meaning to scan and post somewhere as a treat for those that might want take a look at something really old. One of my favorite oldies is a hard covered Factory Mutual handbook published in 1947; it is serial numbered and I guess it was the forefunner of FM's datasheets and as old as it is, older then I am, it has some material you can't find anywhere else.

It's around 800 pages long with lots of tutorials, k-factors for different fire hoses, and graphics on hand calculations. I am sure the FPE's know about it but it is amazing what you can do with N^1.85 graph paper as far as using them to calculate resultant yields from loops and grids.

Seems all the young ones want to go to Atlanta where all the action is.

Merry Christmas.

 

[rrewis]

That should put you somewhere around Tifton right? Grinnell possibly? Valdosta here. Don't want Atlanta, at 18 that's where I was sent to train for Automatic Sprinkler Co. of America. Stayed there 1-1/2 years, got home sick and ran home!
Sure would like to see that old NFPA13.

Russell

 

[stookeyfpe]

SD2

Ditto on the old copy of NFPA 13.

 

[SprinklerDesigner2]

"That should put you somewhere around Tifton right?"

Actually in Adel just 20 miles up the road from you.

 

[rrewis]

Granny always said it pays not to talk about someone 'cause you just never know who you're talking to. If you ever get down this way stop in Brown Automatic Sprk.

 

[SprinklerDesigner2]

I'll do that.

I haven't been here very long... started in late June.

If you ever need anything don't hesitate to call.