Roof height for sprinkler K5.6
Roof height for sprinkler K5.6
(OP)
Sirs:
I understand that there is no limit for roof height (deflector height) in NFPA 13 for sprinklers with 5.6K.
Beyond that, is it good practice to design with 5.6 K at 60 ft, or they should be with a higher discharge coefficient? I have read discussions on this issue about vaporizing of wáter but have found no technical basis to provide a higher K.
Occupancy is Convention Center, taking it as OH II.
thanks
I understand that there is no limit for roof height (deflector height) in NFPA 13 for sprinklers with 5.6K.
Beyond that, is it good practice to design with 5.6 K at 60 ft, or they should be with a higher discharge coefficient? I have read discussions on this issue about vaporizing of wáter but have found no technical basis to provide a higher K.
Occupancy is Convention Center, taking it as OH II.
thanks





RE: Roof height for sprinkler K5.6
Travis Mack
MFP Design, LLC
www.mfpdesign.com
https://www.facebook.com/pages/MFP-Design-LLC/9221...
RE: Roof height for sprinkler K5.6
RE: Roof height for sprinkler K5.6
I will look deep in FM datasheets. I think your approach is sound.
stookeyfpe: we are the designers, there is no engineer of record. We think that going beyond OHII may be overkill. Maybe we should clarify what kind of exhibitions are not protected.
RE: Roof height for sprinkler K5.6
I believe it would be prudent to clearly state the limitations of the sprinkler system based on the NFPA 13 definition on the shop drawing. Also, I seem to recall that maybe GE GAP has guidance for the protection of large convention centers.
At the end of the day, the local fire code official should be considering all the variables.
RE: Roof height for sprinkler K5.6
By GE GAP you mean Global Asset Protection? Are they fire protection related?. The two organizations that we follow are NFPA and FM. At least in NFPA 13 there is no explicit reference to the occupancy.
Here the AHJ has no requirements for sprinklers, but there are some expceptions in the fire compartment requirementes if they are provided.
Providing for EHII would be the most conservative approach but we are not sure.
RE: Roof height for sprinkler K5.6
RE: Roof height for sprinkler K5.6
RE: Roof height for sprinkler K5.6
Maybe OHII is not adecuate.
RE: Roof height for sprinkler K5.6
RE: Roof height for sprinkler K5.6
Bingo: in tables 3 to 5 in DS 0200 there are the spacing rules for sprinklers, depending on the hazard category. There is no 5.6K sprinkler for roofs over 30 ft.
Also in DS 3-26 the demands are related to ceiling height (table 2)
Thanks for your help.