Projections are not permitted if the fire separation distance is:

Projections are architectural features that extend beyond the exterior walls of a building, such as balconies, awnings, or signs. The regulation of projections is closely tied to the concept of fire separation distance, which is the minimum distance required between two structures or between a structure and a property line to limit the risk of fire spread.

When the fire separation distance is between 0 and 2 feet, any projection into this zone can significantly increase the fire hazard, as it allows for less distance for fire to spread between structures. In such close proximity, a fire originating from one structure could more easily ignite another due to the limited space. Building codes typically enforce strict limits on such projections in these conditions to enhance safety and reduce risks associated with fire spreading.

In contrast, as the fire separation distance increases to 2-4 feet, 4-6 feet, or 6-8 feet, regulations often allow for certain projections under specific conditions because there is a larger gap that can help mitigate the risk of flames reaching an adjacent structure. Therefore, the prohibition of projections is most critical when the fire separation distance is at its lowest, which is why the correct answer reflects a distance of 0-2 feet.