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is it mandatory requirement by NFPA to install fire pumps on solid foundation or it can be installed on floor of pump room? The pumps are supplied with steel frame base plate. Kindly guide.

During monthly churn test for electric pump, do we need to close main discharge valve and pressure should be exerted on discharge assembly or we should keep main discharge valve open for all the sytem to bear pressure including fire sprinklers. (Because churn pressure should be 140% of rated...

Dear TravisMack, Thanks for clarifying the concept. Actually pendent sprinklers are already existing in the shop. I have to install upright sprinklers only.

Regardless of pipe schedule and hydraulic calculations, If we have to connect the two different layers of sprinklers with same gate valve, should we consider both layers for pipe size? Because both layers of sprinklers are covering the same shop (one layer for pendent and other layer for upright...

Dear all, I have to install fire sprinklers in a shop in shopping mall and there is gypsum board false ceiling in the shop. There is the requirement to also install upright sprinklers above false ceiling. The area of the shop is 180 square meters so there will be 16 pendent and almost 15 upright...

So regarding shopping mall,can we use only 2 risers for ground floors and for first floor we can extend pipes from these two risers and use control valves to cover first floor area? I need answer according to NFPA or standard practice. Thanks

Inside mall, there will be separate control valve (gate vale with tamper switch) for each shop.

So regarding shopping mall,can we use only 2 risers for ground floors and for first floor we can extend pipes from these two risers and use control valves to cover first floor area?

Good day to all, What is criteria to select number of risers in shopping mall(Ordinary Hazard Group2), we've a shopping mall who has two floors. The area of the shopping mall is 75,000 sq.ft. on each floor.According to NFPA 13 we can use 2 risers to cover this area on ground floor, does we need...

What is the maximum coverage area of 6" riser and 8" risers. The building is a shopping mall(Ordinary hazard Group 2) and system has multiple risers.

Thanks , I've got my answer

Thanks for your guidance. I've got my answer.

@SprinklerDesigner2 Thanks for correction. There are HVAC ducts, and different electrical cables between suspended ceiling and concrete ceiling, in this case does we need to install fire sprinkler? Secondly is there any issue of space between two ceilings to go for sprinklers installation?

We're working in a building where the distance between false ceiling and concrete ceiling is almost 2.5 meters. AHJ have required to install another layer of upright sprinklers between these ceilings. What does code say about it. What is minmum distance to install sprinklers between such type of...

thread184-195655 SprinklerDesigner2 (Mechanical) Sir, You've mentioned in above thread that the only time a manifold would be advantageous is when the building requires multiple risers due to its large size. Large size means exceeding 52,000 sq. ft. in a light or ordinary hazard occupancy or...

Why multiple firefighting risers are used in big shopping malls. which code drives this selection.How much is the maximum coverage area for a riser. Or how much maximum sprinklers a riser can feed. For example if I have total 200,000 sq. ft. area to protect. How many risers should I use for a...