I believe the UL Listing for ESFR precludes draftstops.  Vents are not required 
and need to be a higher temperature if provided.

Robert J. Pielow, P.E.


-----Original Message-----
From: [email protected] 
[mailto:[email protected]] On Behalf Of Ronl.Fletcher
Sent: Tuesday, February 08, 2011 3:17 PM
To: [email protected]
Subject: RE: Smoke-heat vents and draft stops

One would think so if they know they know need the exit tunnels but I'm not 
sure. They asked me if making the entire building ESFR would make a difference 
in the vents and draft stops. Right now there is a preliminary site plan only.


Ron Fletcher
Aero Automatic
Phoenix, AZ




-----Original Message-----
From: [email protected] 
[mailto:[email protected]] On Behalf Of 
[email protected]
Sent: Tuesday, February 08, 2011 2:10 PM
To: [email protected]
Subject: RE: Smoke-heat vents and draft stops

Has there been a code analysis regarding egress performed?  If there has, that 
should have revealed what is required.   

Any reason to use ESFR throughout?  

Craig L. Prahl, CET   
Fire Protection 
CH2MHILL
Lockwood Greene
1500 International Drive
Spartanburg, SCĀ  29304-0491
Direct - 864.599.4102
Fax - 864.599.8439
CH2MHILL Extension  74102
[email protected]



-----Original Message-----
From: [email protected] 
[mailto:[email protected]] On Behalf Of Ronl.Fletcher
Sent: Tuesday, February 08, 2011 3:52 PM
To: [email protected]
Subject: Smoke-heat vents and draft stops

In a F-1 S-1 occupancy, million plus sqft, 35 ft roof and requires rated exit 
tunnels are draft stops and/or smoke vents required? And if we use ESFR's 
throughout the entire building are they required? I read that they are (2006 
IBC 910) but I'm not sure if there are exceptions elsewhere?


Ron Fletcher
Aero Automatic
Phoenix, AZ


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