As is normal for me, I’m late to the party. I won’t try to speak for what NFPA 13 requires or doesn’t require, but a couple thoughts:
* If this were a domestic drain pipe, would it require seismic protection? * What’s in the best interest of your client? If that drain line is damaged by earthquake and the damage goes undetected, it will become very detected the next time the drain system is used. Now back to my regularly scheduled program. Ed Kramer From: BRUCE VERHEI <[email protected]> Sent: Thursday, March 14, 2024 5:57 PM To: Discussion list on issues relating to automatic fire sprinklers <[email protected]>; Ken Wagoner <[email protected]> Subject: [Sprinklerforum] Re: Gang drain crossing seismic joint I agree with all in this case. Low point drains and inspection’s test can cause water damage in earthquakes. In Anthony C.’s home turf the most common break I saw in what our E-376 calls tilt-up town were in these lines. 1” tee’d over to wall, a 90 down, and almost immediately a 4” piece of unistrut and clamp. Quite rigid. The 1” broke immensely above clamp, on one side or other of 90. Lots of these. Damage? Dpepeded on rack locations and value of stock. On 03/14/2024 2:06 PM PDT Ken Wagoner <[email protected]<mailto:[email protected]>> wrote: 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<tel:(760)745-6181> Visit the website<https://linkprotect.cudasvc.com/url?a=http%3a%2f%2fwww.parsleyconsulting.com%2f&c=E,1,Y5zKJKPEh1mBEBqSR-VE9cUKl5y-eyP8BpvmE_5j9ZqW2eJbNphYzrCMBZ-2YuX6d-RRkHI4gQ1FV-cvOeCfRC58uZS9NiToZv2mx7909oCqLvCW_n5hDHeK&typo=1> 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. [cid:[email protected]] Steve Leyton, President T | 619.255.8964<tel:619.255.8964> x 102 | www.protectiondesign.com<http://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]<mailto:[email protected]> _________________________________________________________ SprinklerForum mailing list: https://lists.firesprinkler.org/list/sprinklerforum.lists.firesprinkler.org To unsubscribe send an email to [email protected]<mailto:[email protected]>
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