What limit applies to accessory occupancies in terms of the area they can occupy in mixed-use buildings?

Accessory occupancies in mixed-use buildings are generally limited to a specific percentage of the total building area to ensure that the primary use remains dominant and does not compromise safety or functionality. In most building codes, including the International Building Code (IBC), the maximum area that accessory occupancies can occupy is typically set at 10% of the total area of the building. This limit helps maintain clear separations between different types of uses, allowing for better management of building systems, fire safety measures, and occupant safety.

If a mixed-use building were to exceed this limit, it could lead to issues regarding compliance with safety regulations and might require different construction types or fire protection strategies. Limiting accessory occupancies to this percentage is a critical aspect to ensure that the primary purpose of the building is not overshadowed by supplementary uses.