What is the maximum number of stories of a building that must indicate specific materials for fire-resistance rating on construction documents?

The requirement for indicating specific materials for fire-resistance rating on construction documents becomes crucial as the height of a building increases. Typically, for buildings that have three stories or more, fire-resistance rating necessitates a detailed specification of materials used in construction. This is because the risk of fire and the potential spread of flames increase with the height of the structure.

The code established by building standards necessitates that as buildings exceed two stories, they often require more stringent fire-rated materials to ensure safety and compliance with fire codes. Materials and their ratings must be clearly documented to provide proper guidance for ensuring the building meets the necessary safety criteria.

Thus, for buildings that are three stories and above, it is essential to have specific materials indicated in the construction documents to address fire resistance adequately. This also helps in fire department readiness and in guaranteeing that the structural integrity is upheld in the event of a fire. Therefore, the correct response aligns with these safety requirements and construction codes.