The reason for the term supplemental is that as the stairs are not sufficient the horizontal exit will supplement (increase) the exit capacity of the building. My opinion would be that you would not want the other two buildings / zones to alarm because as you pointed out the occupants would be possibly entering into the zone of the fire incident (depending on how the horizontal exit is utilized). That is not to say that you could not alert the occupants of the other zones to the possibility of a fire.
Carl Chappell -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Ed Vining Sent: Friday, February 01, 2008 4:17 PM To: sprinklerforum@firesprinkler.org Subject: Re: Sprinkler Zones for Horizontal Exit Building Carl, I am not sure of the definition of the word "supplemental" as used. Bill pointed out that the stair widths are insufficient for simultaneous evacuation of the buildings. Therefore, the horizontal exits are required exits. We seem to agree that there should be three zones. I am not sure you agree that the notification appliances cannot be operated in other than the fire building. Ed Vining 4819 John Muir Rd Martinez CA 94553 925-228-8792 [EMAIL PROTECTED] ----- Original Message ---- From: "Chappell, Carl" <[EMAIL PROTECTED]> To: sprinklerforum@firesprinkler.org Sent: Friday, February 1, 2008 2:46:36 PM Subject: RE: Sprinkler Zones for Horizontal Exit Building >From what we have experienced, the intent of the horizontal exit is to be supplemental to the stairs and other egress components. However, as currently done the horizontal exit also acts as an audible zone boundary. This implies that the notification appliances connected to the fire alarm system are also zoned to match. Essentially the fire alarm (detection and notification), sprinklers and smoke management (if provided) should be zoned to match the physical characteristics of the building(s). Carl Chappell -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Ed Vining Sent: Friday, February 01, 2008 8:42 AM To: sprinklerforum@firesprinkler.org Subject: Re: Sprinkler Zones for Horizontal Exit Building The fire can be in any of the three buildings. If I am standing in a corridor by a horizontal exit and hear the alarm, I look up at the exit sign and go through that exit. That exit sign just told me I was going to a safe place. It can very well send me into the fire area. Ed Vining 4819 John Muir Rd Martinez CA 94553 925-228-8792 [EMAIL PROTECTED] ----- Original Message ---- From: Ray Schmid <[EMAIL PROTECTED]> To: sprinklerforum@firesprinkler.org Sent: Friday, February 1, 2008 6:20:00 AM Subject: RE: Sprinkler Zones for Horizontal Exit Building Bill, If we were discussing a health care or detention and correctional occupancy, I would say the zoning should definitely match the barrier arrangement. The intent being that you need to know which zone is in alarm to communicate alarm sequences to occupants under a defend in place strategy. If your example is a general evacuation, what difference would it make where the fire was occurring? All areas would receive a temporal 3 general evac alarm. Egress through a horizontal exit does not necessarily mean the occupants should remain in the building. You mentioned construction type, which leads me to presume you may have a fire wall creating a separate building(s). If that is the case, zones per building make sense as the occupants in the adjacent building may not evacuate. I don't think there is specific code language in either the IBC or LSC on this issue. It's something that needs to be integrated into the overall fire evacuation strategy, marrying together life safety, fire alarm, and sprinkler objectives. Ray Schmid, P.E. President Schmid & Associates, PC Fire Protection Engineers 443-465-4206 [EMAIL PROTECTED] -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of [EMAIL PROTECTED] Sent: Tuesday, January 29, 2008 7:51 AM To: sprinklerforum@firesprinkler.org Subject: Sprinkler Zones for Horizontal Exit Building A single use structure has been divided into 3 buildings because of occupancy and construction type issues related to the IBC. Horizontal exits are provided and this means the building cannot be evacuated simultaneously using the stair widths available. Question - Are separate sprinkler zones required for each building? I believe the answer is yes but I can't find a code reference that spells this out in black and white. It seems if the sprinkler zones cross over the building boundary the fire alarm system will not be able to operate the correct evacuation signals. Bill Brooks William N. Brooks, P.E. Brooks Fire Protection Engineering Inc. 372 Wilett Drive Severna Park, MD 21146 410-544-3620 Phone 410-544-3032 FAX 412-400-6528 Cell _______________________________________________ Sprinklerforum mailing list Sprinklerforum@firesprinkler.org http://lists.firesprinkler.org/mailman/listinfo/sprinklerforum To Unsubscribe, send an email to:[EMAIL PROTECTED] (Put the word unsubscribe in the subject field) _______________________________________________ Sprinklerforum mailing list Sprinklerforum@firesprinkler.org http://lists.firesprinkler.org/mailman/listinfo/sprinklerforum To Unsubscribe, send an email to:[EMAIL PROTECTED] (Put the word unsubscribe in the subject field) _______________________________________________ Sprinklerforum mailing list Sprinklerforum@firesprinkler.org http://lists.firesprinkler.org/mailman/listinfo/sprinklerforum To Unsubscribe, send an email to:[EMAIL PROTECTED] (Put the word unsubscribe in the subject field) _______________________________________________ Sprinklerforum mailing list Sprinklerforum@firesprinkler.org http://lists.firesprinkler.org/mailman/listinfo/sprinklerforum To Unsubscribe, send an email to:[EMAIL PROTECTED] (Put the word unsubscribe in the subject field) _______________________________________________ Sprinklerforum mailing list Sprinklerforum@firesprinkler.org http://lists.firesprinkler.org/mailman/listinfo/sprinklerforum To Unsubscribe, send an email to:[EMAIL PROTECTED] (Put the word unsubscribe in the subject field) _______________________________________________ Sprinklerforum mailing list Sprinklerforum@firesprinkler.org http://lists.firesprinkler.org/mailman/listinfo/sprinklerforum To Unsubscribe, send an email to:[EMAIL PROTECTED] (Put the word unsubscribe in the subject field)
