I believe they are different. In fact, there is a definition that a “tee”, has a bottom width less than the top.
Not at a book, but I am sure someone will chime in shortly. R/ Matt Please rate our customer service<https://survey.medallia.com/?emailsignature&fc=3539&bg=Fire%20and%20Fabrication> Matthew J. Willis, CWBSP, CET Engineering Manager – Southwest Region FERGUSON FIRE DESIGN, LLC A Wholly Owned Subsidiary of Ferguson Fire & Fabrication, LLC 3508 Hwy. 557 West Monroe, LA. 71292 C: 307-236-8249 [email protected]<mailto:[email protected]> www.FergusonFire.com<http://www.fergusonfire.com/> From: Jackie Ward <[email protected]> Sent: Friday, February 9, 2024 2:38 PM To: [email protected] Subject: [Sprinklerforum] Concrete Beams -- NFPA 13, 2016 Caution: This email originated from outside of the organization. DO NOT click links or open attachments unless you recognize and trust the sender. ________________________________ I have 18” wide concrete beams extending 24” from the bottom of the deck on 7’-0” centers. NFPA-13 (2016) 8.6.4.1.2 Obstructed Construction (5)* Installed with deflectors of sprinklers under concrete tee construction with stems spaced less than 71⁄2 ft (2.3 m) on centers, regardless of the depth of the tee, located at or above a horizontal plane 1 in. (25 mm) below the bottom of the stems of the tees and complying with Table 8.6.5.1.2. A.8.6.4.1.2(5) For concrete joists spaced less than 3 ft (900 mm) on center, the rules for obstructed construction shown in 8.6.4.1.2 apply. For concrete tee construction with stems spaced less than 7 ft 6 in. (2.3 m) on center, the sprinkler deflector can be located at or above a horizontal plane 1 in. (25 mm) below the bottom of the stems of the tees. This includes sprinklers located between the stems. [See Figure A.8.6.4.1.2(5).] I am getting caught up in semantics with the wording. Would a concrete beam be interpreted the same as a concrete tee? Am I allowed to install the deflectors above one-inch below the bottom of the beam in accordance with Table 8.6.5.1.2 as I would be if they were concrete tees, or will pocket protection be required? Sincerely; Jackie "JW" Ward; SET 1-405-240-7076 [email protected]<mailto:[email protected]> NICET IV Cert. No. 104187 Victaulic Vortex Integrator Firetrol Protection Systems 108 NW 132nd Street; Oklahoma City, OK 73114 405-752-2330 Ext. 10230 Fax:405-752-2297 License No: AR-FSS-162, LA-F415, OK-863 & 302, TX - ECR-1751432, ACR-1751168, SCR-G-0292 [cid:[email protected]][Firetrol Oklahoma City BACK][cid:[email protected]]
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