As per 8.15.23.3 and 8.15.23.3.1, the sprinklers are to be extended above the office ceiling a for distance equal to 0.6 times the square root of the design area, but a minimum of 24 ft.
To my way of thinking, this means that the density out in the warehouse is to be extended over the office that far, which means that the k-factor should be the same as that of the warehouse sprinklers. Larry Keeping From: Sprinklerforum [mailto:[email protected]] On Behalf Of [email protected] Sent: March-02-17 2:28 PM To: [email protected] Subject: RE: different k-factors in same area Ok, so I go back to my previous post. If it's just a suspended ceiling and there no combustibles above, no platforms, etc., you should be good with extending the whse roof sprinklers 15 ft beyond the half wall into the ceiling space above the office as noted in the NFPA excerpt I quoted earlier. FYI, this is predicated upon the space above the office not being able to be used in any way for storage or any fuel fired equipment platforms. Craig L. Prahl Fire Protection Group Lead/SME CH2M 200 Verdae Blvd. Greenville, SC 29607 Direct - 864.920.7540 Fax - 864.920.7129 CH2MHILL Extension 77540 [email protected]<mailto:[email protected]> From: Sprinklerforum [mailto:[email protected]] On Behalf Of Tim Easter Sent: Thursday, March 02, 2017 9:51 AM To: [email protected]<mailto:[email protected]> Subject: RE: different k-factors in same area [EXTERNAL] What is the height of the warehouse roof/ceiling? 40' What is the height of the half wall? 28' What is the height of the office ceiling? 14' Is the space above the office ceiling walled off from the warehouse? no Tim Easter, PE W.W. Gay Fire & Integrated Systems, Inc. 522 Stockton Street Jacksonville, FL 32204 Phone: (904) 387-7973 Cell: (904) 476-4325 Fax: (904) 394-7261 This electronic message contains information from W. W. Gay Fire Protection, Inc., which may be confidential or privileged. The information is for use of the individual or the entity named above. If you are not the intended recipient, please be aware that any disclosure, copying, distribution or use of the contents of this message is prohibited. If you have received this electronic transmission in error, please notify us immediately at 1-904-387-7973. From: [email protected]<mailto:[email protected]> [mailto:[email protected]] Sent: Thursday, March 2, 2017 9:34 AM To: [email protected]<mailto:[email protected]> Subject: RE: different k-factors in same area Another case of where more info helps drive the answers. What is the height of the warehouse roof/ceiling? What is the height of the half wall? What is the height of the office ceiling? Is the space above the office ceiling walled off from the warehouse? Craig L. Prahl Fire Protection Group Lead/SME CH2M 200 Verdae Blvd. Greenville, SC 29607 Direct - 864.920.7540 Fax - 864.920.7129 CH2MHILL Extension 77540 [email protected]<mailto:[email protected]> From: Sprinklerforum [mailto:[email protected]] On Behalf Of Tim Easter Sent: Thursday, March 02, 2017 8:58 AM To: [email protected]<mailto:[email protected]> Subject: different k-factors in same area [EXTERNAL] I have a half-wall that separates an office area from a warehouse area. The design is for K factors of 8.0 inside warehouse area, and 5.6 inside office area. But since the halfwall doesn't reach the deck the area above the office area protected from the ceiling must have same k-factor as warehouse correct? Can anyone point that out in NFPA 13 as a code reference? Tim Easter, PE [Description: Description: Description: http://www.wwgfp.com/MailLogo.gif]<http://www.wwgfp.com/Brochere.jpg> 522 Stockton Street Jacksonville, FL 32204 Office: (904) 387-7973 Cell: (904) 476-4325 Fax: (904) 394-7261 This electronic message contains information from W. W. Gay Fire Protection, Inc., which may be confidential or privileged. The information is for use of the individual or the entity named above. If you are not the intended recipient, please be aware that any disclosure, copying, distribution or use of the contents of this message is prohibited. If you have received this electronic transmission in error, please notify us immediately at 1-904-387-7973.
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