EFSR and CMSA

[eagle_26]

Hello everyone !

Now, I have a project (factory building more than 10,000 sq.m floor area) that need to be design automatic sprinkler all area , but when I read NFPA13 found that there are ESFR and CMSA sprinkler and I still confuse for the both type.

How to know when we use ESFR or CMSA ?
What is main different between EFSR and CMSA sprinkler?

Thank you very much

 

[TravisMack]

The main difference is given by their name:

Early Suppression Fast Response - Intended to suppress a fire.
Control Mode Specific Application - Intended to control/contain a fire to a certain area of the space protected.

CMSA are what used to be referred to as Large Drop sprinklers.

Travis Mack
MFP Design, LLC

http://www.mfpdesign.com

"Follow" us at

https://www.facebook.com/pages/MFP-Design-LLC/92218417692

 

[LCREP]

Also what are you trying to protect in the warehouse, both technologies have limitations on the commodity, storage configuration, height of storage, height and slope of the building, etc. What kind of water supply do you have that will also dictate what system to use. Have you reached out to the insurance carrier engineering department for input?

 

[eagle_26]

TravisMack

Thank you very much for your advise.

LCREP

Thank you very much for your advise.
This building alomost are production area not warehouse , but there are only some area to use for keeping finishing good and raw material.The system is wet pipe sprinkler all buildig and have water storage tank reserve for fire pump.

About the insurance, I will ask client again because they never give me information and never talk about this issue.

 

[LCREP]

Eagle

If ESFR is used only in the warehouse area the following should be considered:

1.Significant water damage to production areas will occur because of the higher flow from the sprinkler.
2. Higher cost for both types of systems which is not needed for production areas as an ordinary hazard system should be used.
3. If the warehouse and production areas are not separated by a wall, a draft curtain must separate the ESFR system from the ordinary sprinkler system as per NFPA 13.
4. Obstructions are a significant concern with ESFR systems. Sprinklers too close to building structure, lights, heating equipment can result in the system not controlling or extinguishing the fire. NFPA 13 has many requirements and the installation contractor should have experience installing these types of systems.
5. Solid shelfing can not be protected by either system, NFPA has specific requirements which should be addressed with the client.

As a retired insurance engineer a significant number of warehouses I inspected had inadequate sprinkler protection or ESFR obstructions. Unfortunately I still look up when I visit big box stores to the constant comment from my wife ....you are not working anymore what we want is not at the ceiling......