Many plumbing codes prohibit exposed drainage piping above food service areas. Is the piping considered exposed if there is a drop ceiling below? If so, would drywall ceiling help? Thank you.
I have a project for 7 story building with cellar (parking garage in the cellar, two stories medical offices and others are residential). My understanding - for parking garage I have ordinary hazard 1, in other places it is light hazard. My hydraulic calculations show that there is enough...
Need to specify sprinkler booster pump for one project. Hydraulic calculations show that 75gpm@50PSI will do the job. But in NFPA20 (Centrifugal pump capacities section) there are 50gpm and next capacity is 100gpm. Do I have to comply with this or for booster pump I can choose 75gpm...
Hi Everybody,
I am in New York, and the code requires for standpipes to provide 70 psi at the most remote connection. The pressure at street level is 55 psi. I did hydraulic calculation and it is adequate for sprinkler demand, it is going to be combined system. Does it mean, that in any case...
Hi Everybody,
Is it required to provide sprinklers in staircases (it is 6 stories building, 2 hrs rated staircase enclosure, metal stairs). I am in New York City. I have seen similar projects done by others, some engineers make stairway enclosure sprinklered, some others do not.
Thank you very...
Dear Members,
Model plumbing codes require indirect piping (air gap) when connecting food handling fixtures to the plumbing system. Typical arrangement for restaurants is: triple sink - grease trap - plumbing system. My question is - where it is preferable to put an air gap - upstream or...
Hi,
I am recently joined small firm and was involved in several small projects to design fire sprinkler system. Those were designed using pipe schedule method. Now I need to perform hydraulic calculation for one project. My question is regarding area of calculation, which according to NFPA 13...
