NFPA 13 Section 220.127.116.11:
"Early suppression fast-response (ESFR) sprinklers shall not be used in buildings with automatic heat or smoke vents unless the vents use a high-temperature rated, standard-response operating mechanism."
ESFR sprinklers are designed to act fast and suppress the fire, the inclusion of a roof vent that opens up before the sprinkler activates could severely impact sprinkler activation both in terms of timing and location (as the moving smoke could activate a more remote sprinkler). If automatic roof vents are present, they should have a high-temperature rated standard-response operating mechanism to ensure that the sprinkler activates before the vent opens up.
Based on the above, am I correct to interpret smoke venting is not required with ESFR systems?
How do I go about handling smoke or heat vents with ESFR, or are they not necessary to begin with?
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6/10/2021 08:13:46 am
The value of automatic vents in unsprinklered buildings is not questionable.
6/10/2021 08:16:23 am
But at the end (as it is normally the case), the AHJ will have the last word on whether you need to put smoke vents or not in your building.
6/10/2021 08:17:49 am
If a smoke and heat removal system is installed along with a sprinkler system, the automatic roof vents are required to have an operating element with a temperature classification higher than the sprinklers per NFPA 13. This is in hopes to minimize the potential effect the smoke and heat removal system can have on sprinkler activation. For automatic heat or smoke vents used with ESFR sprinklers by requiring automatic heat or smoke vents to use a high-temperature rated, standard-response operating mechanism. However if allowed by the AHJ depending on the use of local codes adopted, you can eliminate the use of smoke and heat vents with the use of ESFR sprinklers in high piled storage occupancies.
6/10/2021 09:08:24 am
See International Fire Code chapter 32 for the table that specifies when smoke and heat vents are required.
Based on the above response please confirm on the following :-
6/12/2021 08:13:30 am
See 910.2 of the IFC or IBC they have an exception for ESFR sprinkler systems
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