So... The structural part with the uprights and ductwork where u mention it being able to spray over the obstruction.... You have that 18"... Does that mean the obstructions have to be under or within 18" tall? Problem, this stupid health inspector is telling me I need heads between ductwork in the pump room. There's like 6 inches of space between the ducts. Rooms 8x4 we'll say. Ducts are 3x and span the entire room. One duct is like 3 inches from the ceiling while the other is a tish lower. So technically, sure I could get a deflector over it.... But at least one would never get water sprayed over jt
Sounds like in your situation you’re using a standard spray quick response upright. When using a standard spray head as long as the deflector is over the non structural obstruction that is less than 4’ wide it will have enough spray to control the fire, providing satisfactory performance. If your inspector thinks the duct is too tight to the deck for spray to go over then the next step is to try and position the head to spray under using the beam rule. If that can’t work out a head on either side of the obstruction.
Why big duct at 8:15 ruclips.net/video/V0yOc47MkOY/видео.htmlsi=BNHpzP79gbJl2fr-&t=495 is NOTobstruction and small pipe @7:28 is obstruction and need to follow 3x rule ?
@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
@@NFPAJoeso in light and ordinary hazards.. the obstructions other than structural elements are allowed in 18" zone below the deflector... When the width of obstruction is less than 1.2 Meters?
@@AFUQALKHAFJI check out my video on obstructed and un obstructed construction. Distance down from ceiling to understand how sprinkler head distance vertically works from the ceiling. Let me know if that answers your question. 👍
Is it permissible to install pendant type sprinklers for open roofs, such as factories or parking lots, according to the NFPA?
Per NFPA 13 you can install pendants or uprights. But uprights can give you better clearance for the hot gas layer in the ceiling.
wow .. these videos are so good and so helpful! please continue to make videos about NFPA 13
@@albertmiranda7764 thank you! I have some more videos coming soon 😎👍
Appriciated, excellent videos. No videos available on website regarding the obstruction
Thank you !
Great content, I really appreciate your work.
Thank you. !
Great lecture !!!
@@asoteico9528 thank you ! 😎👍
Nice work Joe
Joe you got the Automatic Hand book ? Its better than the standard npfa13.
Thanks ! Yes I have a membership with NFPA codes online!
Do you have the requirements for a wall?
Are you asking how far off the wall the sprinkler can be located ?
Dude keep it up!
Working on some good topics I’m trying to get them done soon 😎👍
@@NFPAJoe extremely helpful videos my guy, looking to pass my journeyman’s test at the end of the week and this helps a ton.
Good luck on your test !! 💪
Joe, why you made limited videos? Why not continue other videos which have unique topic? Like Deluge valve etc
I do plan on making more videos. I want to cover all the different style sprinkler system valves and fire pumps.
So... The structural part with the uprights and ductwork where u mention it being able to spray over the obstruction.... You have that 18"... Does that mean the obstructions have to be under or within 18" tall?
Problem, this stupid health inspector is telling me I need heads between ductwork in the pump room. There's like 6 inches of space between the ducts. Rooms 8x4 we'll say. Ducts are 3x and span the entire room. One duct is like 3 inches from the ceiling while the other is a tish lower. So technically, sure I could get a deflector over it.... But at least one would never get water sprayed over jt
Sounds like in your situation you’re using a standard spray quick response upright. When using a standard spray head as long as the deflector is over the non structural obstruction that is less than 4’ wide it will have enough spray to control the fire, providing satisfactory performance. If your inspector thinks the duct is too tight to the deck for spray to go over then the next step is to try and position the head to spray under using the beam rule. If that can’t work out a head on either side of the obstruction.
Why big duct at 8:15 ruclips.net/video/V0yOc47MkOY/видео.htmlsi=BNHpzP79gbJl2fr-&t=495 is NOTobstruction and small pipe @7:28 is obstruction and need to follow 3x rule ?
@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
@@NFPAJoeso in light and ordinary hazards.. the obstructions other than structural elements are allowed in 18" zone below the deflector... When the width of obstruction is less than 1.2 Meters?
Is it permissible to install pendant type sprinklers for open roofs, such as factories or parking lots, according to the NFPA?
@@AFUQALKHAFJI check out my video on obstructed and un obstructed construction. Distance down from ceiling to understand how sprinkler head distance vertically works from the ceiling. Let me know if that answers your question. 👍