Although not part of the actual standard, A.4.7.2 says......
"It is not the intent of this subsection to restrict the use of pressure reducing valves downstream of the discharge isolation valve for the purpose of meeting the requirements of 4.7.7."
So in essence, once you've passed the pump...
Yes but "High Hazard Commodity" doesn't mean anything. The IFC might as well have used the phrase "extra super gooder". It's doesn't point towards any particular criteria from NFPA. Well, not that I'm aware of at least.
I think exposed, non-expanded, unstable, group A plastics to 12' with up...
Do I treat this as plastics storage?
Looks like the bins will be stored to a max of 12' with 14' ish clearance to the deck.
Feels like the bin boxes themselves are the hazard and not the product.
Surely NFPA has addressed the plastic bin boxes being dictated by the auto makers.
Terry S...
Bar joist construction, open shop, brass uprights, ordinary hazard 2, 22' deck height. Just a plain Jane type install.
Terry S. Davis
National Fire Protection
h2o-racing@comcast.net
I've always thought my remote area for EC sprinklers was 5 sprinkler or 1500 sq.ft. Which ever is greater. Assuming no area reduction of course. Think uprights at 20' aff for OH.
We've had an inspector tell us that if the sprinklers are protecting say 18'6"x18'6" and the flow is increased...
Your certainly right on that one. Very difficult to get info on fire sprinklers. It's like a black art. I was thrilled to find this forum to bounce ideas off of. Every once in while I find something in a standard that makes no sense. Then what? We rarely have time to wait for an...
Perhaps I have been fortunate.
Would a TIA to the 1999 edition apply to previous additions of NFPA?
Terry S. Davis
TriStar Fire Protection
tdavis0114@comcast.net
Strange. I posted to this and it's gone.
You only need to provide the .10 gpm/sq.ft. in areas that are not dwelling units or their adjoining corridors. Discharge rates in the dwelling units and the adjoining corridors (if res. sprinklers used in corridors) "shall be provided in accordance...
Once you understand how it works you start to lay your systems out so that they balance. It's really fun with some of the programs available now. You can try different sprinklers, different pipe, different areas. Minutes to do what once took days. You can play with a pipe sizes, hit the...
You can use residential sprinklers within the dwelling units and the adjoining corridors and calculate just 4 sprinklers in accordance with the sprinkler manufacturers data sheet and NFPA13
Start with the definition of "dwelling unit"
Then go to
5-4.5.1
7-9.2.1
This appears in the 1996 and...
Hydraulic calculations and systems designed with hydraulic calculations require an understanding of the effects the layout can have on the demand. A poorly designed system can have a higher demand than a pipe schedule system.
I've noticed with some of our newer designers that they don't...
Another consideration regarding PVC piping on the upper floors is that the pipe itself requires much more hanger support. Sometimes the spacing of the steel is such that it becomes larbor intensive. You can use drop in anchors (if the spec allows it)but still there will be many of them.
