×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!
  • Students Click Here

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here

Jobs

High Temp Sprinklers

High Temp Sprinklers

High Temp Sprinklers

(OP)
Maybe y'all can help settle a discussion I am having with a colleague:

Scenario:

There is a 40'x100' area used for storage that is protected with high temp sprinklers.  Adjacent to that is a "corridor" that is about 40'x100'.  It is essentially an "L" shape.   There is no real physical separation between the areas.  The ceiling is higher in the storage area - 15' ceiling vs the 14' ceiling in the corridor.  There is also a wall that is located at the bend in the "L", but it does not go the full width to completely separate.  The wall stops about 15' short of closing off the space.

Since the storage area is protected with 286F sprinklers, is the rest of the corridor required to be protected with 286F sprinklers since there is no true complete separation of the area.

Is there a reference somewhere that confirms yes or no?

RE: High Temp Sprinklers

See NFPA 13, 2002, section 12.1.5 or in the 2007 edition, section 12.3 Adjacent Occupancies. Extend the 286 heads for 15'beyond the perimeter of the storage. BUT if u look at the Annex A, it indicates use 30' not 15' if the design area is 2000, 40' if 3000, etc. Clear as mud...

RE: High Temp Sprinklers

(OP)
This was my line of reasoning as well.  You just extend it 15' beyond (or more from the annex)...But, my friend swears that it has to be high temp throughout.  I will try to explain again.  I just wanted another opinion to confirm what I thought...Thanks!!

T

RE: High Temp Sprinklers

I aggre with the fifteen foot rule. I thought there was something in NFPA 13 about mixing and matching heads, but cannot find it.

RE: High Temp Sprinklers

(OP)
cdafd:
 
You can't find it about temps because it is not there.  I have "argued" till I was blue in the face with my friend, but he says that he is right and there is no persuading change.

Now the question begs, is there an inherent danger in placing high temp (286F) sprinklers in an area with max ambient temps <100F and no storage or unit heaters to trigger a requirement for high temp heads?  What is the time delay of activating sprinklers because they are 100F+ higher than should be?  Would it negatively impact the system?

Thanks!!

RE: High Temp Sprinklers

TravisMack

BIG FIRE

Would have to research that one, but after reading the post again could see using lower temp heads in the corridor, what ever temp nfpa 13 requires, if there is NO STORAGE in the corridor. Why is the corridor so wide???

RE: High Temp Sprinklers

If your "corridor" really needs to be a Corridor (per the building code), then you may not be able to reduce the fire rating of the Corridor to zero (as it sounds like is the case now) based on the presence of high-temperature sprinklers, as the corridor should probably be QR to get that reduction.

So...you separate it, then it gets normal light hazard heads!

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members!


Resources