In which occupancy group are the vertical openings created by an atrium not permitted?

The correct answer is the occupancy group where vertical openings created by an atrium are not permitted is Group H. This group is specifically designated for buildings that address the potential hazards associated with high-risk activities, such as the handling and storage of hazardous materials. The nature of these activities necessitates strict building design and construction standards to mitigate risks, including fire hazards and other safety concerns.

In Group H occupancies, the creation of vertical openings, such as those found in atriums, can increase the risk of fire spread and smoke movement throughout the building. This could jeopardize the safety of occupants and firefighters, as well as complicate evacuation routes. Therefore, regulations typically prohibit or heavily restrict such openings to maintain safety during emergencies.

Occupancy groups like A (Assembly), E (Educational), and S (Storage) may allow for vertical openings under specified conditions since their risk factors are generally different from those associated with Group H. Understanding these distinctions is crucial for ensuring that the architectural design and safety features of buildings match their intended use and occupancy classification.