Department store more than 52000 sqft area

[Junaid Khan]

Hi,


A retail store of UK has a ground floor of 80,000sqft and 60,000 sqft is the first floor car park and rest 20,000sqft is the staff area in first floor.

As per NFPA ordinary hazard class 2, 52000sqft
is the maximum for a sprinkler operation.

So how many risers can come in this? And do we need to have different pumps for different risers?

I need confirmation/understanding that each riser is considered as 52000sqft or something else.
If this system is a ring main type.

Regards,
Junaid khan

 

[MatthewJWillis]

Not quite sure of the extent of the questions you are asking.

80,000/52,000 = 1.53, or 2 System Risers minimum.

Pump for each System Riser- I am not sure of what you are asking.
Normally there is one pump for building if needed.

Ring type main- Presumably looped?

Really not enough info here.
Are car parks heated?
If not, you get into a complete different set of questions.

Perhaps a local sprinkler contractor could help you.

R/
Matt