As the standard is currently written, there is no relief from the 8’-0
minimum spacing requirement for ESFR sprinklers. The committee did discuss
this issue for the 2022 edition and would allow distances less than 8’-0
where the ESFR sprinklers are installed in each channel in obstructed
constructi
Kevin,
Thanks for the response. I should have asked my questions in two parts. First
the 8'-0 minimum which you stated the committee has and is looking at and
secondly is the (12) ESFR fire sprinkler calc area. Does or should the area
square footage come into play in the design? At the 8'-0
We have a project that was pre-engineered. It has several issues that we are
having to correct. One is something I haven’t considered. We have a concealed
combustible space that requires 130 sq ft max spacing. The pendents are 225 sq
ft max spacing. All of the walls for the office spaces –
Are you required to use concealed space sprinklers?
If it meets the NFPA definition of a room and the requirements of 11.2.3.3 are
met, then you should be able to use it above a ceiling. Be sure of any fire
resistance rating requirements.
Todd G Williams, PE
Fir
4' deep space so no specially listed sprinklers. But the unobstructed criteria
in 13 for the definition of a small room, I believe kicks me out. But this is
a first for me.
Travis Mack, CFPS, CWBSP, RME-G, SET
Engineering Manager
MFP Design
3356 E Vallejo Ct
Gilbert, AZ 85298
NEW EXTENSION: 4
You got it. You must satisfy the definition of small room and my guess is
you will not meet the requirements.
Thanks,
John
John August Denhardt, PE
*Vice President, Engineering and Technical Services*
*American Fire Sprinkler Association*
m: p: 301-343-1457
214-349-5965 ext 121
w: firesprinkler
