I look at occupancy of the building. If it is a B occupancy then I am comfortable for light hazard. If it is M occupancy then obviously OH2. I don’t ever personally take a QR reduction in shell spaces.
Travis Mack, SET MEPCAD | Instructor / Training Specialist 181 N. Arroyo Grande Blvd. #105 I Henderson, NV 89074 www.mepcad.com<http://www.mepcad.com/> | m: 480.547.9348 AutoSPRINK | AutoSPRINK FAB | AutoSPRINK RVT | AlarmCAD Book appointment time in my calendar https://calendly.com/t_mack_mepcad Academy of Fire Sprinkler Technology | Executive Director 101 S Main Street, Suite 001, Decatur, IL 62523 ________________________________ From: Steve Leyton <[email protected]> Sent: Saturday, May 9, 2026 5:22:07 PM To: Discussion list on issues relating to automatic fire sprinklers <[email protected]> Cc: [email protected] <[email protected]> Subject: [Sprinklerforum] Re: Shell space? That's a big step forward for common sense, but what if the tenant is a sales office with full height partitions for privacy? Until you see a plan for the fit-out, you don't know if sprinkler spacing will average 85 or 185 sq. ft. My firm specifies and/or designs that sprinklers shall be spaced at 100 sq. ft. and modeled for .20/1500. Overkill? Perhaps, but we always have enough outlets for a clean T.I. and the contractor of that work doesn't fall into hydraulic black hole. Steve Leyton Sent from my "Smart" Phone, so apologies for any typos or voice-to-text corruptions. -------- Original message -------- From: Rick Matsuda <[email protected]> Date: 5/9/26 3:05 PM (GMT-08:00) To: [email protected] Cc: [email protected], Sprinklerforum <[email protected]> Subject: [Sprinklerforum] Re: Shell space? As a former AHJ, I would accept the following. Get a signed letter from the owner and the architect stating that the tenant improvement spaces will only be occupied by light hazard office spaces and not ordinary hazard spaces like retail, manufacturing, or storage. Inform all parties involved that any deviation from the letter will result in costly upgrades. It will be cheaper for them to plan for ordinary hazard now than to make changes in the future. They are also limiting the types of tenants who might want to lease the spaces. Good luck, Rick Matsuda On May 9, 2026, at 4:50 PM, daren welborn <[email protected]> wrote: When I’m designing shell space in office buildings; it’s always been to light hazard. Shell space in a future strip mall or industrial type areas, has always been to ordinary group I or II. Sincerely, Daren Welborn On May 9, 2026, at 5:20 PM, Parsley Consulting <[email protected]> wrote: Friends, I'm in the process of a lengthy plan review of a -13 compliant sprinkler system. The layout has shown large areas of "shell" space, and the calculations show light hazard, for future TI. For a long time, perhaps to long to admit, I've had the impression such spaces should be either OH1 or OH2. Any clarity? sincerely, Ken Wagoner, SET Parsley Consulting 3002 Younger Drive Harrisonville, Missouri 64701-3909 Phone: (760) 745-6181 Visit the website<https://url.avanan.click/v2/r01/___https://linkprotect.cudasvc.com/url?a=http%3a%2f%2fwww.parsleyconsulting.com%2f&c=E,1,Y5zKJKPEh1mBEBqSR-VE9cUKl5y-eyP8BpvmE_5j9ZqW2eJbNphYzrCMBZ-2YuX6d-RRkHI4gQ1FV-cvOeCfRC58uZS9NiToZv2mx7909oCqLvCW_n5hDHeK&typo=1___.YXAzOnByb3RlY3Rpb25kZXNpZ25hbmRjb25zdWx0aW5nOmE6bzpiZjAzOTk0YWEzZWZlMzM2OTY5OTIxYmZjYmU3NmI3YTo3OjFmOWE6ZWMxN2ZlNzY3Mzk5NGVhNmJkNTFjYTMxZjEyMmI1M2I2YjMwMTQxYjlkYmJkMDJkZDIzNjJmNTQwNjM0MzQ2MjpoOlQ6Rg> _________________________________________________________ SprinklerForum mailing list: https://url.avanan.click/v2/r01/___https://lists.firesprinkler.org/list/sprinklerforum.lists.firesprinkler.org___.YXAzOnByb3RlY3Rpb25kZXNpZ25hbmRjb25zdWx0aW5nOmE6bzpiZjAzOTk0YWEzZWZlMzM2OTY5OTIxYmZjYmU3NmI3YTo3OmJmNWQ6YjZhMTU5ZGJkNWRiMjkwZTY2NDAxNTdiOGUzZGFhYjUyMmQ3YzMzNTkxODY3ZDY3N2JlZWU5MTc2NTc1NDJjZjp0OlQ6Rg To unsubscribe send an email to [email protected] _________________________________________________________ SprinklerForum mailing list: https://url.avanan.click/v2/r01/___https://lists.firesprinkler.org/list/sprinklerforum.lists.firesprinkler.org___.YXAzOnByb3RlY3Rpb25kZXNpZ25hbmRjb25zdWx0aW5nOmE6bzpiZjAzOTk0YWEzZWZlMzM2OTY5OTIxYmZjYmU3NmI3YTo3OmJhNjY6OGI4Y2UzY2JmNzU5OTdlZWViN2U5OWM2ZGZhNThhZDQ0NDBkNzY3ZWYwZDgxM2JhYjA5ZTFkMmIyOWZkYzI2Yzp0OlQ6Rg To unsubscribe send an email to [email protected]
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