I'm working on an NFPA 13 three-story hotel.
Code permits residential sprinklers or quick-response sprinklers in the dwelling units and adjoining corridors.
Is there any advantage to using one type of sprinkler over the other?
Thanks in advance for your comments.
Sent in anonymously for discussion. Click Title to View | Submit Your Question | Subscribe
8/30/2021 06:20:44 am
9/16/2021 01:34:51 pm
So are you not able to use the manufacture's specifications with standard pendants and uprights? Only residential?
8/30/2021 08:14:28 am
Also, remember that residential sprinklers are listed specifically to address the life safety of occupants who might be in the room where a fire originates. This is a big advantage!
8/30/2021 08:21:54 am
I agree with Alex. You can use both, the maximum manufacturer sprinkler spacing and the maximum area of coverage
8/30/2021 08:23:37 am
The 2021 IBC (scoping document ... where required) permits NFPA 13R sprinklers in Group R Residential occupancies IF the building meets all the following : (4) stories of fewer abve grade plane, floor level of highest story is 30 feet or less above the lowest level of fire department vehicle access, floor level of lowest story is 30 feet or less below the lowest level of fire department vehicle access.
8/30/2021 11:02:17 am
Be careful with only considering the IFC Ch.9 scoping requirements for when a 13R is allowed. Many architects use a NFPA 13 upgrade for compliance with IBC Ch.5 (Building Heights and Areas) e.g. Group R-2, Type VB construction only allows two stories but you get an extra story if you upgrade the system to 13. There are many other allowances, e.g. egress travel distance, allowable opening %, etc, only when 13 is used. So its best to get your required sprinkler standard from the building designer.
8/30/2021 01:35:45 pm
9/3/2021 09:30:28 am
Darren & Chad,
8/31/2021 08:26:00 am
If the hotel-in-question does not meet all (3) conditions as outlined by 2021 IBC 903.1.2 NFPA 13R sprinkler systems, then NO matter what NFPA 13R may permit, it is not permitable by the IBC.
8/30/2021 08:40:05 am
As Alex said, it is a huge advantage to use residential type sprinklers. They allow for a 4 head design at a .05 gpm density, and you get to take advantage of the different K factors and spacing. There is a huge selection of heads with different capabilities. The downside is that you need to read all the listing requirements carefully. It is not a one size fits all.
8/31/2021 09:41:03 am
I concur with Casey on the advantages to having a variety of K-factors and pressure requirements to choose from.
8/30/2021 09:53:57 am
I would just like to piggy back one advisory onto the 13R suggestions. 13R systems are less expensive to install but the client should be advised that 13R systems are designed for life safety and most insurance companies do not give sprinkler credit for 13R systems and will only provide their sprinklered rates for full NFPA 13 (0.10/4head) systems, so the money they save installing the 13R might be lost in insurance premiums in the long run.
8/30/2021 10:03:28 am
Awesome point, Joshua.
8/30/2021 10:38:34 am
There's a big advantage in spacing with 13R sprinklers. But, if the floor plan is such that going to maximum spacing in a compartment isn't a benefit, then there may be value in using a different sprinkler.
8/30/2021 05:46:44 pm
I agree with Joshua 100%. R-1,R-2: check the architectural code sheets, and look for the “ trade offs “ the architect took to build the building and I ve found that you can only put a 13 system in it. That will limit you to 5 or 7 heads in a corridor at a .10 density.
Leave a Reply.
Subscribe and learn something new each day:
Top May 2023 Contributors
Get 100 Days of Free Sample Questions right to you!
PE PREP SERIES