You can't exceed 40k sq ft of storage in one system. That gives you up to 12k sq ft of Light/Ordinary hazard to go with your space. If the office space is not designated yet, the AHJ may be going that it is all storage today and he wants it protected for today.

However, I would try to argue a bit of common sense. What benefit will the extra control valve give you? It is just another failure point in the system. FM Global has pretty much gone away with system size limitations as they are somewhat self limiting.

Travis Mack, SET
MFP Design, LLC
2508 E Lodgepole Drive
Gilbert, AZ 85298
480-505-9271
fax: 866-430-6107
email:[email protected]

http://www.mfpdesign.com
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On 9/15/2016 9:32 AM, James Crawford wrote:

We have a multi-tenant warehouse building, 43,000 ft², it will be divided into 3 tenant spaces of about 14,300 ft² each with loading bays in the rear of the warehouse and allowance for 3,000 ft² of office at the front of each tenant space. The warehouse space will be designed for high pile storage utilizing ESFR sprinkler heads. As the building will be shell coverage the AHJ is saying we require 2 sprinkler zones as we are over 40,000 ft²

We have allowed for 1 sprinkler zone for the building on the assumption the rear of the warehouse is used for loading and unloading with no high storage, there will be future office space up to 3,000 ft², this would allow a system up to 52,000 ft², and we would be 43,000 ft²

Any comments or direction that will allow our assumption

Thank you

James Crawford

Phaser Fire Protection Ltd.

Phone  604-888-0318

Fax 604-888-4732

Cel 604-790-0938

Email  [email protected]



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