NFPA 13R Lead-In In Building Riser

[jjmoore73]

What is the standard design/install for a lead-in on a NFPA 13R sytem. I am very familar with 4" and 6" one piece stainless steel Ames In Building Risers for commercial buildings. I have (2) 13R projects, one has 2" PVC underground pipe stopping 5' from the building. The other show 3" PVC stopping 5' from the building. What type of material and connection is typically used? I've noticed Blazemaster CPVC is rated for underground use. Has anyone installed a Blazemaster IBR? Is the 90 degree CPVC fitting allowed to be buried under the slab and probably buried in the concrete thrust block?

Would it make sense for the UG installer to continue with his UG pipe into the building and stop 12" above finsh floor? Is there a particular fitting to transfer from UG PVC pipe to Blazemaster type CPVC?

J.Moore

 

[cdafd]

Have the sizes been hydraulically proven???

What kind of project/ building??

Have to see what 13r says on ug, I do not think 13 would allow the material

 

[cdafd]

does not appear that NFPA 13R restrict the transition piece.

 

[jjmoore73]

Project is a 2 story apartment. NFPA 13R is the appropiate standard. Sprinkler design is complete and hydraulically proven. On NFPA 13 commercial buildings, we typically supply an Ames 1 piece IBR sweep and the underground contractor installs it. When a smaller water supply is adequate, what is the typical method for bring smaller pipe into the building?

J. Moore

 

[cdafd]

I have only seen Ames on projects I have done

But have seen plastic on other projects not in our ahj

 

[cdafd]

13r does not say much and does not have to be hydro tested