×
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

ESFR On Line Spacing Less Then 8' Options??

ESFR On Line Spacing Less Then 8' Options??

ESFR On Line Spacing Less Then 8' Options??

(OP)
I have a client with ESFR system obstructions and I am looking for options.

Here is what I have, the heads are K17 pendent with 23 lines running East to West. One head on each line is obstructed in the same location by being too close to bar joist.  If we move the head so it is 12" from the obstruction it will be 7'6" away from the adjacent sprinkler, less then the 8' required by NFPA and FM 2-2. I can not use an upright K 17 because I have exposed non-expanded plastics.

Only option I can think of is to install a baffle on the 23 heads to prevent the water from one ESFR hitting the other. Any idea how large this baffle should be? I am thinking 2' wide by 2' deep with the ESFR head centered. The heads are 10-14" below the desk.

Suggestions comments?

RE: ESFR On Line Spacing Less Then 8' Options??

I don't like baffles because they themselves are an obstruction. I would model the sprinkler performance and the impact of the spacing using FDS.

Seek professional engineering assistance.

RE: ESFR On Line Spacing Less Then 8' Options??

(OP)
FYI
I called FM and spoke to the guy who wrote FM Data Sheet 2-2. He said since the ceiling was only 30' based on testing it was OK to place the heads at 7'6". Skipping and wetting of the adjacent sprinkler would not be a problem.

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