ESFR AND MULTIPLE ROW RACKS

[SystemDesigner]

Good day all

With regards to Table 16.2.3.1 of NFPA 13, if one has a ceiling height of 12.2m and a maximum storage height of 7.6m one can apply E.S.F.R sprinkler protection to class 1 to 4 products stored in multiple row racks.

Now under the definition of multiple row racks refer 3.9.3.7.3 of NFPA 13

3.9.3.7.3 Multiple-Row Racks. Racks greater than 12 ft (3.7 m) in depth or single- or double-row racks separated by aisles less than 3.5 ft (1.1 m) wide having an overall width greater than 12 ft (3.7 m).

If i use a K 240 (metric k-factor) head with a minimum starting pressure of 360kPa, am i correct in saying that no in rack sprinklers are required?

 

[sprinkler1000]

You are correct. No in rack sprinkler required.

Many other variables shall apply to use ESFR, as ceiling slope that can not be exceeded, taking care of obstructions, etc.

 

[SystemDesigner]

All other variables have been satisfied.

Is there a limitation with regards to the maximum rack width?

 

[sprinkler1000]

I guess they are not limited in width but I am not sure.

 

[3cio]

Gooda day!

I think, as long as you can satisfy the requirement of a single row, double row, multiple row rack arrangements, then you are good to go to follow the table 16.2.3.1

hope it helps,