that's easy to answer! >From NFPA 13 (most editions for years):
5.2* Light Hazard Occupancies. Light hazard occupancies shall be defined as occupancies or portions of other occupancies where the quantity and/or combustibility of contents is low and fires with relatively low rates of heat release are expected. 5.3* Ordinary Hazard Occupancies. 5.3.1* Ordinary Hazard (Group 1). 5.3.1.1 Ordinary hazard (Group 1) occupancies shall be defined as occupancies or portions of other occupancies where combustibility is low, quantity of combustibles is moderate, stockpiles of combustibles do not exceed 8 ft (2.4 m), and fires with moderate rates of heat release are expected. 5.3.1.2 Dedicated and miscellaneous storage shall be protected in accordance with Chapter 12 and Chapter 13 as applicable. 5.3.2* Ordinary Hazard (Group 2). 5.3.2.1 Ordinary hazard (Group 2) occupancies shall be defined as occupancies or portions of other occupancies where the quantity and combustibility of contents are moderate to high, stockpiles of contents with moderate rates of heat release do not exceed 12 ft (3.66 m), and stockpiles of contents with high rates of heat release do not exceed 8 ft (2.4 m). 5.3.2.2 Dedicated and miscellaneous storage shall be protected in accordance with Chapter 12 and Chapter 13 as applicable. _____ From: Sprinklerforum [mailto:[email protected]] On Behalf Of [email protected] Sent: Monday, December 05, 2016 9:36 AM To: sprinklerforum Subject: College Lab Classrooms Quick question. College Lab classrooms. Light or Ordinary hazard? Bill Menster WFM Consulting Inc. 2416 Malaya Ct. Punta Gorda, FL 33983 ph. 941-421-9786 fax 941-391-6133 [email protected] www.wfmconsultinginc.com
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