Res. Sprinkler Obstructed with Wall Bump-Out?

10/19/2021

We have a residential project where we are looking to use a residential sidewall sprinklers. The project is under NFPA 13 - 2016 Edition

On a wall where we have a sprinkler, there is a a projecting 3-inch x 24-inch wide x full-height obstruction bump-out of the wall.

How far away from this would the sprinkler need to be?

Or, do I need to add a sprinkler on the other side of the obstruction?

I'm wondering if these could be considered "shadow areas" because the shadow area would be under 3 sqft (NFPA 13-2016 8.10.7.1.4, and A.8.1.1(3)).

Thanks in advance.

Sent in anonymously for discussion. Click Title to View | Submit Your Question | Subscribe

8 Comments

Glenn Berger

10/19/2021 08:16:31 am

A plan sheet showing the configuration would help for providing proper assistance. My gut feel answer is: Provide a sprinkler on the opposite side of the projection.

10/19/2021 08:45:31 am

If this is a residential project, and you are using residential heads, wouldn't this be under NFPA 13-R?

SCHULMAN

10/19/2021 08:53:32 am

i don't think 3" projection from the wall (regardless of width?) constitutes anything.
could be wrong.

Jesse

10/19/2021 09:09:33 am

Would love to know the full dimensions of the area.

Jon link

10/19/2021 10:45:50 am

As this is residential area, NFPA 13R is more applicable.

Alex

10/19/2021 11:10:41 am

Hi Anonymous,

This, in my eyes, would be a gray area within the code. Considering it is only bumping out 3" from the wall, I would assume if you were able to stay a couple feet from it, you are okay. Although, that is not code driven.

How far off of an adjoining wall is the bump out? Does the wall with the bump out only have one head or multiple? If multiple, could you reconfigure to resolve this issue by providing protection on both sides?

Curious to hear more.

Thanks,
Alex

Mike

10/19/2021 11:19:21 am

Check with the manufacturer's data sheet or call there technical support.

Jack G

10/19/2021 11:23:44 am

My initial reaction is a 3 inch projection into a room would not be detrimental to any sprinkler spray pattern.
I would do a plan view of the room , and with the spray pattern chart , identify if the shadowed area, ( with the actual spray pattern ) meets whether an additional head is not required.
I m thinking the shadowed area is minuscule.
The sidewall itself could be moved further off the bump out wall , and that could / might eliminate the issue.

Leave a Reply.

Home
Our Cause

The Blog
The Forum

PE Exam Prep
The Toolkit
MeyerFire University

Pricing
Login
Support
Contact Us

MeyerFire.com is a startup community built to help fire protection professionals shine.
Our goal is to improve fire protection practices worldwide. We promote the industry by creating helpful tools and resources, and by bringing together industry professionals to share their expertise.

MeyerFire, LLC is a NICET Recognized Training Provider and International Code Council Preferred Education Provider.
All text, images, and media Copyright © 2016-2024 MeyerFire, LLC

We respect your privacy and personal data. See our Privacy Policy and Terms of Service. The views, opinions, and information found on this site represent solely the author and do not represent the opinions of any other party, nor does the presented material assume responsibility for its use. Fire protection and life safety systems constitute a critical component for public health and safety and you should consult with a licensed professional for proper design and code adherence.

Discussions are solely for the purpose of peer review and the exchange of ideas. All comments are reviewed. Comments which do not contribute, are not relevant, are spam, or are disrespectful in nature may be removed. Information presented and opinions expressed should not be relied upon as a replacement for consulting services. Some (not all) outbound links on this website, such as Amazon links, are affiliate-based where we receive a small commission for orders placed elsewhere.

Res. Sprinkler Obstructed with Wall Bump-Out?

Leave a Reply.

ALL-ACCESS

SUBSCRIBE

COMMUNITY

YOUR POST

PE EXAM

FILTERS

ARCHIVES

PE PREP SERIES