I agree with Benjamin, except for using vertical sidewalls. Vertical sidewalls installed outside the building envelope will expose wet pipe to freezing. You will need to use dry horizontal sidewall sprinklers.
From: Ben Young <[email protected]> Sent: Monday, November 3, 2025 2:15 PM To: Discussion list on issues relating to automatic fire sprinklers <[email protected]> Subject: [Sprinklerforum] Re: standard sidewall on dry system I would say anything past horizontal is too far. Use vertical sidewalls instead Benjamin Young On Mon, Nov 3, 2025 at 1:32 PM Matt Grise <[email protected]<mailto:[email protected]>> wrote: We are looking at a dry system for an unheated building. attached to the outside of the building is a canopy/roof eave that extends more than 4' away and will require sprinklers. We would like to use standard sidewall sprinklers as allowed by NFPA 13 2022 8.2.2.2 (4) "horizontal sidewall sprinklers installed so that water is not trapped." The canopy slopes down away from the building, so the sprinkler head will need to be angled down to discharge downward along the slope. Question - how far can you angle a sidewall down to match a slope and still have it installed so that water is not trapped? If you angle it all the way down (like a pendant) - it would trap some water and pendants are not allowed. but how far is too far? We have a 3.5/12 roof slope, is that ok to match? Thanks! Matt Grise _________________________________________________________ SprinklerForum mailing list: https://lists.firesprinkler.org/list/sprinklerforum.lists.firesprinkler.org To unsubscribe send an email to [email protected]<mailto:[email protected]> Disclaimer This email message and all attachments are for the sole use of the intended recipient(s) and may contain confidential and privileged information. Any unauthorized review, use, disclosure, or distribution is prohibited. If you are not the intended recipient, please contact the sender by reply e-mail and destroy all copies of the original message. Content cannot be guaranteed to be secure or error-free as information could be intercepted, corrupted, lost, destroyed, arrive late or incomplete, or contain viruses. The sender therefore does not accept liability for any errors or omissions in the contents of this message, which arise as a result of e-mail transmission. If verification is required please request a hard-copy version. Disclaimer This email message and all attachments are for the sole use of the intended recipient(s) and may contain confidential and privileged information. Any unauthorized review, use, disclosure, or distribution is prohibited. If you are not the intended recipient, please contact the sender by reply e-mail and destroy all copies of the original message. Content cannot be guaranteed to be secure or error-free as information could be intercepted, corrupted, lost, destroyed, arrive late or incomplete, or contain viruses. The sender therefore does not accept liability for any errors or omissions in the contents of this message, which arise as a result of e-mail transmission. If verification is required please request a hard-copy version.
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