Which type of construction is comprised of noncombustible materials for all structural members and requires at least 2 hours of fire resistance?

Type 1 construction is characterized by its use of noncombustible materials for all structural components, such as steel and concrete. Due to these materials' inherent properties, this construction type is specifically designed to withstand the stresses of fire much longer than other types. The requirement of at least 2 hours of fire resistance means that the primary structural elements, such as columns and beams, are built to prevent the spread of fire and maintain structural integrity during a fire event for a significant period. This makes Type 1 construction ideal for high-rise buildings and structures with a critical need for fire safety, as it allows for safe evacuation and effective fire control measures.

In contrast, other construction types, such as Type 2, Type 3, and Type 4, incorporate varying degrees of combustibility and are not held to the same stringent fire-resistance standards as Type 1. Understanding these differences is crucial for fire inspectors, as they assess the fire risk and implement appropriate safety measures based on the construction type.