Division occupancy group

Within each of the occupancy groups are subcategories called Divisions. The types of hazardous materials stored or used within the facility (Physical or Health Hazards as described below) dictate the Division of the H Occupancy which applies. Note also that Article 80 of the UFC may be used to determine the correct division. The following descriptions are paraphrased and abbreviated from the UBC definitions of Group H facilities (refer to Sec. 307.1.1) ... 

Cleanroom facilities were often originally constructed as B-2 occupancy (Group B, Division 2, which included office buildings printing plants factories and workshops using materials not highly flammable or combustible, etc.). As such, these facilities were allowed to have unlimited area when sprinklered and surrounded by side yards. When such facilities are converted to Group H occupancy, severe restrictions on the allowable area may be imposed by the UBC. 

Lost time accidents Ashland has a corporate goal to eliminate occupational injuries and illness. For APAC the target date is 2003. In 1999 Ashland s group OSHA recordable frequency rate was 4.87. The rates in the divisions were ... 

NIOSH. 1979. Industrial hygiene report, preliminary survey of wood preservative treatment facility at Koppers Company, Inc, Forest Products Group, Florence, South Carolina. Cincinnati, OH. National Institute for Occupational Safety and Health, Division of Surveillance, Hazard Evaluations and Field Studies. NTIS PB86-136652. 

Service corridors are intended for the transportation of HPMs within an H-6 occupancy and are governed by UBC 220,307.11.4 and UFC 5107. Service corridors shall be classified as Group H, Division 6 occupancies. Service corridors shall be separated from exit corridors as required by UBC Section 307.11.2.1. The maximum distance of travel from any point in a service corridor to an exterior exit door, horizontal exit, exit passageway, enclosed stairway or door into a fabrication area shall not exceed 75 feet. 

An emergency power system shall be provided in Group H, Divisions 6 and 7 Occupancies to automatically supply power to the exhaust ventilation system when the normal electrical supply system is interrupted (UBC 307.2.8). Only exhaust is required to be on emergency power however, the exhaust must be balanced with makeup air and, thus, some supply fans may also require emergency power, particularly in the case of critical clean-rooms. Refer to section on HVAC systems for further discussion). 

Legally required standby power systems are intended to provide electric power for control of health hazards and to aid in fire fighting or rescue operations. Upon loss of normal power, legally required standby systems must be connected to the alternate power source wiY/i/w 60 seconds. Standby power shall be provided in Group H, Divisions 1 and 2 Occupancies and in Group H, Division 3 Occupancies in which Class I, II or III organic peroxides are stored (UBC 307.2.7). 

Deflnition. Emergency Control Station (ECS) is an approved location on the premises of Group H, Division 6 occupancies where signals from emergency equipment are received (UBC 206-E). 

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