[Sprinklerforum] Re: Gang drain crossing seismic joint

Thu, 14 Mar 2024 14:07:15 -0700

Steve,

three points here.
  • §18.4.1 requires clearance for a drain extending through a wall, floor, platform, foundations.
     
  • §18.5.1.6 omits any bracing requirements for drain piping downstream of the drain valve.
     
  • It isn't a branch line so restraint is not required. §18.6.4

All references from the 2022 edition of -13.

So my thought is that if you have the required clearance when your piping crosses the seismic joint, nothing further is needed.

This is my opinion only.

Ken Wagoner, SET
Parsley Consulting
500 West Mechanic Street
Harrisonville, Missouri 64701-2235
Phone: (760) 745-6181
Visit the website

IMPORTANT NOTICE: This correspondence is not a Formal Interpretation issued pursuant to NFPA Regulations. Any opinion expressed is the personal opinion of the author and does not necessarily represent the official position of the NFPA or its Technical Committees. In addition, this correspondence is neither intended, nor should it be relied upon, to provide professional consultation or services. It should be noted that the above is my opinion as a member of the NFPA Automatic Sprinkler System Hanging and Bracing Committee and the Hanging and Bracing for Fire Suppression Systems Committee in accordance with the NFPA Regulations Governing Committee Projects and should therefore not be considered, nor relied upon, as the official position of the NFPA or its Committees   

 

On 3/14/2024 2:35 PM, Steve Leyton wrote:

All (especially Californicators):

 

We have to cross a seismic joint with the piping that supplies a combination standpipe in a mid-rise building (no PRV’s to test).   As a combo, there’s a collection pipe for sectional test and drain discharge, and for reasons peculiar to this building, our first choice is to bring the gang drain back to the riser room, as it’s the only place with a SS trap in the basement.   We’re trying to decide whether a seismic joint is required of the drain pipe, which is normally dry and never under system pressure in any case.   I reckon I should know this, but I don’t think we’ve had to address this condition in forever, maybe never.

 

 

Steve Leyton, President
T  |  619.255.8964 x 102  |  www.protectiondesign.com
2851 Camino Del Rio South  |  Suite 210  |  San Diego, CA  92108
Fire Protection System Design | Consulting | Planning | Training

 


_________________________________________________________
SprinklerForum mailing list:
https://lists.firesprinkler.org/list/sprinklerforum.lists.firesprinkler.org
To unsubscribe send an email to [email protected]

_________________________________________________________
SprinklerForum mailing list:
https://lists.firesprinkler.org/list/sprinklerforum.lists.firesprinkler.org
To unsubscribe send an email to [email protected]

Reply via email to