What feature characterizes Type I construction?

Type I construction is characterized by its use of non-combustible materials, specifically steel and reinforced concrete. This construction type is designed to provide a high level of fire resistance, which is why it is commonly employed in large buildings such as high-rises and commercial structures. The use of these materials means that the structural elements can withstand significant heat and flames, enhancing the safety of the building in case of a fire.

The focus on non-combustibility in Type I construction distinguishes it from other types that may utilize wood or other combustible materials, which have lower fire resistance. This fire-resistant characteristic is essential for compliance with building codes that dictate the fire safety requirements for different types of construction based on occupancy and building height.