Where is fire blocking required in a two-story structure?

Fire blocking is a crucial safety feature used in residential buildings to prevent the spread of fire and smoke through concealed spaces. In a two-story structure, fire blocking is particularly required between stories and the attic. This is because vertical spaces, such as those found between floors and up into the attic, can allow fire and smoke to travel rapidly between these areas if not properly protected.

By incorporating fire blocking at the points where walls meet ceilings or floors, it creates barriers that help contain a fire to its area of origin, enhancing the safety of the occupants and providing more time for evacuation. This requirement ensures that the potential for fire movement is minimized, promoting better overall fire safety in multi-story buildings.

The other options do address important aspects of fire safety in residential structures but do not specifically pertain to the question of fire blocking between stories and the attic, which is a critical requirement in building codes related to fire safety.