Which statement about IBC use and occupancy classifications is not true?

Which statement about IBC use and occupancy classifications is not true?

• A. Group B is defined by the IBC.
• B. Group C is not defined by the IBC.
• C. Group A-3 is defined by the IBC.
• D. Group M is defined by the IBC.

Answer: (B)

Understanding occupancy classifications helps explain why certain fire protection and life-safety requirements apply to different spaces. The IBC groups occupancies into defined categories so designers can apply the appropriate construction types, means of egress, fire protection, and occupancy limits. Within that system, there are main groups like Business, Assembly, and Mercantile, and there are subcategories such as A-3 for specific assembly uses. Group B being defined by the IBC is correct because business occupancies are specifically classified and regulated under the IBC. Group A-3 is also defined by the IBC as a subcategory of assembly uses, covering certain places of assembly like worship facilities. Group M is defined as mercantile occupancies, such as retail spaces. The statement that Group C is not defined by the IBC is not true because Group C is indeed defined as an occupancy classification within the IBC framework.

Understanding occupancy classifications helps explain why certain fire protection and life-safety requirements apply to different spaces. The IBC groups occupancies into defined categories so designers can apply the appropriate construction types, means of egress, fire protection, and occupancy limits. Within that system, there are main groups like Business, Assembly, and Mercantile, and there are subcategories such as A-3 for specific assembly uses.

Group B being defined by the IBC is correct because business occupancies are specifically classified and regulated under the IBC. Group A-3 is also defined by the IBC as a subcategory of assembly uses, covering certain places of assembly like worship facilities. Group M is defined as mercantile occupancies, such as retail spaces. The statement that Group C is not defined by the IBC is not true because Group C is indeed defined as an occupancy classification within the IBC framework.