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At least the glue on the fitting joints looks pretty neat. Half the jobs I look at, it's smeared all over the pipe. To answer your question directly - that is indeed the worst install I've ever seen. Not by a huge margin though.

My pleasure. Always nice to run into another Canadian on here.

https://submittalsarchive.nfpa.org/TerraViewWeb/ViewerPage.jsp?id=14-2019.ditamap&pubStatus=FDR Go to 9.4.3 where the section has been struck out and click the hyperlink to FR-47.

The section requiring check valves to prevent circulation when standpipes are interconnected at the top and bottom was removed between the 2019 edition and the 2024 edition during the First Revision cycle. This change was logged as FR-47, with the following NFPA 14 committee statement...

For the first question, NFPA 13 requires that water curtain sprinklers discharge a minimum of 3 gpm/lineal foot (37L/Min / lineal meter), so 6' x 3 gpm/ft = 18 gpm (68.13L) minimum flow per sprinkler. For the second question, either you're not posting the entire question, or there is a diagram...

Are you taking a test? And posting the questions here in hopes we'll answer them for you?

Are you trying to give us a pop quiz? I'm a half-decent tech. Some might even say the 'top'. Now throw out some hard questions, not these lay-ups.

The obstruction criteria for the VK950 is on page 14 of 26 in the online datasheet. https://www.vikinggroupinc.com/sites/default/files/documents/081216.pdf NFPA 13 standard spray obstruction rules apply when spaced up to 15x15, EC obstruction rules apply when spacing exceeds 15x15.

My mistake. I saw the bare steel studs in the second picture and assumed that construction was ongoing. It's hard to comment on specific building/fire/plumbing code issues if we don't know where you are or what code you're following. As an electrical engineer, your duty of care probably...

If I was a betting man, I'd say the plumbers set the sleeve in the wrong location and missed the wall in the suite above that the drain needed to be installed inside. If it was an architectural change after the concrete was poured, it would just be a legitimate extra and they'd x-ray and core...

It would definitely turn the fire pump on. NFPA 20 recommends that jockey pumps be sized to provide a flow less than that of a single sprinkler. A test and drain with a restricted orifice is required to allow a flow rate of at least a single sprinkler. When the handle is in the drain position...

I have never heard of radiant panels that big, spaced that closely, in a storage warehouse. Are they just placed at the overhead doors on the exterior walls, or throughout the floor area? With the metric units and NFPA references - I'm guessing this is in Canada?

NFPA 20-2022 4.21.2.1 goes so far as to say that multiple pumps are required to be installed in the same room, when installed in a series arrangement, unless permitted otherwise by 4.21.2.2.

Lol no worries. This forum is a ghost town compared to what it used to be, so it's nice to be able to take a stab at questions every now and again.

The width is always the lesser of the two horizontal dimensions. The longer dimension is the length. You could have a combustible projection extending 100' out from the building, but if the other dimension is 4' or less, no sprinklers required. Similarly, you could have a combustible...

NFPA 13-2019 9.5.5.3.1.1 requires sprinklers below open-grate flooring exceeding 4'-0 in width. A4.3.4 classifies both 'metalworking' and 'machine shops' as ordinary hazard group 2 occupancies, meaning the use of sidewall sprinklers would be permitted. My solution would be to run a single...

Sprinkler design is heavily standardized, and probably to a slightly lesser extent fire alarm design (though I can neither confirm or deny this, as I've never designed a fire alarm system). There are facets of fire protection engineering that rely far more on engineering judgment (egress...

Is the product stored 16' high, or is the building 16' high? The title of the post seems to conflict with the second sentence. Travis - I agree with your sentiment, but good luck finding 1000 designers to give that question to these days lol. I don't know if there are even 1000 of us left in...

Thank you for the follow-up - I had no idea that new table was there. Makes life quite a bit simpler now, compared to how it used to be.

For #1 - the formula to calculate # of sprinklers / branch line is found in FM DS 3-0 2.1.2.2.3.2 Number of Sprinklers/Pressure Format For #2, the only K25 standard response pendent I'm aware of that complies with Table 8 is the Victaulic V4601 -...