The above reference states that additional sprinklers are not required below belt conveyors up to 4ft wide, where the area below is void of storage.
In my situation I have two conveyors, each approximately 2'-9" in width running parallel with each other, with a 2'-9" gap between them.
Would I...
The above figure (showing the extension of sprinkler protection above a drop ceiling) is fairly straightforward. I have a situation where the open space above a drop ceiling occurs at the 't' intersection of a corridor. In the picture, the camera is pointed towards the 'T', where a new rated...
I imagine this has been asked and answered before, but I must be using the wrong combo of keywords in my search.
I have a small storage room where ESFR sprinkler protection will be required in order to avoid in-rack sprinklers. It is a very narrow room, such that it can be protected with two...
I have a question with regards to the ESFR dry pendent 'box-in-a-box' freezer installation. How do you handle the large ceiling-hung condensing units that are present in basically every large cold storage freezer / cooler? Do you provide some kind of a supplemental system below the units? I...
I have a building where a Class IIIB liquid is stored in several large Intermediate Bulk Containers, each with a volume of 5000L (approx. 1300 gal).
Chapter 16 appears to limit the volume of IBC's to 3000L (793 gal) when providing sprinkler protection criteria.
Where would one find sprinkler...
I am in need of a fire pump history lesson.
In the past two weeks, I have looked at two separate fire pump installations where 2,000gpm pumps had been installed with 8" suction and discharge piping, instead of the minimum 10" piping required by NFPA 20. The first time, I was quick to point it...
I have been asked to provide comment on the following situation:
Existing flat roof warehouse, OWSJ roof construction, roof deck approx. 28' above floor, control-mode density area sprinkler system (complete with 11.2k uprights and a fire pump). Potential new tenant wants to store tires in said...
My question will probably betray my lack of experience with aircraft hangar fire suppression systems, so let me preface this post by saying that I am not attempting to design something outside my abilities, not trying to engineer a solution when I am not a licensed engineer - heck, I haven't...
Question regarding elevator shafts in combustible construction.
NFPA 13-2010 8.15.5.5 The sprinkler required at the top of the elevator hoistway by 8.15.5.4 shall not be required where the hoistway for passenger elevators is non-combustible or limited combustible and the car enclosure materials...
I recall seeing an explanation in an issue of Sprinkler Quarterly, however I have since misplaced the issue and the intent of the section.
NFPA 13-2010 22.4.4.6.2 Where the design area is equal to or greater than the area in Table 22.4.4.6.2 for the hazard being protected by the sprinkler...
I remember reading somewhere that FM Global does not require the inclusion of up to two ESFR sprinklers beneath an obstruction in the hydraulic calc like NFPA 13 does as long as you pipe to the head with the same diameter pipe as the branch lines.
I scanned through FMDS 2.0, 3.0 and the 8...
I have been reviewing some drawings and calculations done with sprinkcad and have come across something I have not dealt with before, being an autocad/manual entry hydraulic calc kind of guy. In a parking garage, extended coverage sprinklers have been used in a 16' wide bay, to eliminate one...
I had it written down, lost it and for the life of me I can't remember how it goes.
Equation to figure out flow at a certain pressure when given static and residual. For example, I do a flow test and come up with x static and y residual pressure at some flow. I need to determine how much flow...
NFPA 20-2007 5.14.4.1 Where the suction supply is of sufficient pressure to be of material value without the pump, the pump shall be installed with a bypass.
Has anyone qualified what "material value" is? Best answer I have received is that if the city supply can provide enough pressure and...
Being a prairie guy, I don't do a lot of sprinkler/standpipe systems in high rises. This means I don't deal with >175psi too often. Designing a system for a 36 story, two stair condo at the moment, and I am looking at very high pressures at the lower levels in order to hit 100psi @ 250gpm at...
I am designing a 13R system for a 4 storey building. The floors are framed with open-web wood joists, and there will not be sprinklers in the combustible concealed space. Main floor has a large common area, which would force me to calculate 3000 sq. ft. NFPA 13-2010 11.2.3.2.7.2 prevents me...
Mundane question for a thursday afternoon.
NFPA 13 2010 8.7.3.1.7 Permits sidewalls under overhead doors in an otherwise ordinary hazard area to be spaced for light hazard.
8.3.3.1 would dictate these sprinklers have quick response elements.
8.3.3.2 then requires that if the sidewalls are...
Storage occupancy, with the water available I believe I can make it work without a pump.
The downside...I'm looking at 6" main and 4" branchlines. The roof structure is bent metal "z purlins", and the GC has asked for point loads to determine if the steel can support the hangers.
NFPA 13 2010...
13 2010 6.8.1.3 states that I can use a single butt fdc where the riser is 3" or smaller. I was sure there was a code reference somewhere stating that the fire dept. supply line had to be at least the size of the riser, but I can't find it in the 2010 edition. I'm thinking I am good to go with...
I'm wondering how other forum members are approaching this issue. I've talked to quite a few people about it, some are receptive, some aren't.
Some engineer's have changed their specs to read "install dry system" after I've forwarded them the information, and building owners have stonewalled...
