Ontario Building Code Practice Exam

A fire-rated floor-ceiling assembly is a part of a building's structural system meant to prevent the spread of fire between floors. This type of assembly is required in many commercial buildings to ensure the safety of occupants and limit property damage. The three main requirements for a fire-rated floor-ceiling assembly are non-combustible materials, a fire rating label, and continuous construction from wall to wall. Non-combustible materials are important because they do not contribute to the spread of fire. This means that they will not burn or release harmful gases when exposed to fire. A fire rating label indicates that the assembly has been tested and meets specific fire safety standards. These labels are important for building code compliance and ensuring the assembly will perform as intended during a fire. Finally, continuous construction from wall to wall ensures there are no gaps or breaks in the assembly where fire can spread. The incorrect answer, D, states that there is a minimum thickness requirement of 75 mm for a fire-rated floor-ceiling assembly. However, this is not a requirement for all assemblies and should not be confused as a universal requirement. The other options listed are all important requirements for a fire-rated floor-ceiling assembly.