Sprinkler Height Limitation

I read your attached articles. But this seems not answering my questions. Whether single pump can feed 50 floors and hazard classification for shopping mall. However, thanks for the reference.

Yes. If the pump is of the correct type and adequately sized to meet the fire system pressure and flow requirements.

I didn't find anything in those references about multi-story high-rises.

Then it was a perfect match for the quality of the question.

Maybe for the quality, but not the content. The OP did ask one correct question, but failed to ask many others, and provided too little information.

I'll concede that the OP asked a slightly better question this time.

Track records are what they are.

Have a storage tank for every 5 storeys to supply water to sprinklers.Install duplex pumps in basement to supply each tank.

I am afraid this will end in tears! Sprinkler system fed from storage tanks? Next question is what size the storage tanks! You know where this is heading, right?

In your experience, how sprinkler pumping in this situation shall be tackled ? Is it stage pumping the only choice ? How many floors recommended for each stage ?

This thread is another example of providing a drunken blind man with a gun and inviting him to listen to the bangs.

A cursory examination of cckla's history will confirm his incompetence.

I feel that CR4 is a platform where all the engineers could share their experience or seeking helps from others. This shall be the reason we all here. I agree I might incompetence elsewhere in M&E field. So, this is why I am here to get advice and get improved.

Yes, just move on. The forum is like a pact of wolves, all having an individual role in the gang.

Nope, talking about fire water system ,common sense dictates and it is safer that there should be a redundant pumping system(motorized & auxiliary diesel engine drive) not only one, installed and probably couple of PRV's to corresponding floors regulating the pressure per zone, like wise the fire water tanks might as well be implemented per zone.

Say, you got a fire in the zone 5 (serving floor 45~50) then only, that zone will be activated.

Well, if it were me, then I'd be getting drawings out from similar buildings, reviewing their firewater designs, and seeing what I could clone. I'm not good at reinventing the wheel, then, I'm funny that way.

Any building height can be protected by a sprinkler system, and certainly a 50 story building can.

The pump must be listed for fire service.

The pump is sized based on pressure requirements to maintain adequate water flow at the most remote hydraulic zone (floor 50 in this case).

The pipe may need to be schedule 80 or 160 to support the pressure.

If the local fire department does not have adequate pumping capacity to supply water to floor 50 using their pumpers, you must supply a back-up electrical supply to your fire pump (if it is electrical) Diesel driven pumps are OK as-is.

In every 5 floors install a storage tank and pumps. Basement pumps up to 5th floor,fifthfloor pumps up to 10th floor,10th floor pumps up to 15 floors etc.The size of ranks will decrease every 5 floors.