NFPA 13 3 & 4 Times Rule fire sprinklers spraying over horizontal and around vertical obstructions

NFPA 13 3 times rule and 4 times rule is used for Obstructions to Sprinkler Discharge Pattern Development. This will position the sprinkler head to spray over horizontal obstructions within 18 inches of deflector and around vertical obstructions. This is a full lesson to understand the 3 and 4 times rules.

[@asoteico9528]

Great lecture !!!

[@NFPAJoe]

@@asoteico9528 thank you ! 😎👍

[@albertmiranda7764]

wow .. these videos are so good and so helpful! please continue to make videos about NFPA 13

[@NFPAJoe]

@@albertmiranda7764 thank you! I have some more videos coming soon 😎👍

[@TAHIRHUSSAINMEPINDUSTRY]

Appriciated, excellent videos. No videos available on website regarding the obstruction

[@NFPAJoe]

Thank you !

[@MartinKryekurti]

Nice work Joe
Joe you got the Automatic Hand book ? Its better than the standard npfa13.

[@NFPAJoe]

Thanks ! Yes I have a membership with NFPA codes online!

[@TAHIRHUSSAINMEPINDUSTRY]

Joe, why you made limited videos? Why not continue other videos which have unique topic? Like Deluge valve etc

[@NFPAJoe]

I do plan on making more videos. I want to cover all the different style sprinkler system valves and fire pumps.

[@ADOWAI]

Why big duct at 8:15 th-cam.com/video/V0yOc47MkOY/w-d-xo.htmlsi=BNHpzP79gbJl2fr-&t=495 is NOTobstruction and small pipe @7:28 is obstruction and need to follow 3x rule ?

[@NFPAJoe]

@ADOWAI 7:28 I was going over an example of how to use the 3 times rule. And then went to explain how when using specifically the standard spray upright and pendant in light and ordinary hazard occupancy only structural elements have to be acknowledged when spraying over an obstruction. Unless the obstruction is over 4’ wide.
Let me know if you are understanding now. Thanks