A building with less than how many occupants must be classified as a Group B occupancy?

A building with less than 50 occupants is classified as a Group B occupancy because this classification is based on the intended use and occupancy load of the building. Group B includes buildings used for business purposes that can accommodate a limited number of people without requiring extensive safety measures typically required for larger assemblies. In many building codes, such as the International Building Code, this threshold is established to ensure that spaces designed for business activities remain safe and adequately managed, particularly in terms of egress and fire safety.

Larger occupant loads would necessitate additional safety features and regulations due to increased risks, hence the distinction. Classifying buildings with fewer occupants under Group B helps in applying appropriate regulations suited to their size and usage, ensuring safety while allowing for operational flexibility in smaller business environments.