What kind of construction does Type 1 refer to?

Type 1 construction refers to fire resistive structures, which are designed to withstand fire for a specified amount of time due to the use of non-combustible materials like steel and concrete. This type of construction provides a high degree of protection against the spread of fire and the collapse of the structure. Typically, Type 1 buildings include high-rises and other larger structures where fire safety is a primary concern.

Fire resistive construction requires that materials used can maintain their structural integrity when exposed to high temperatures, making them particularly suitable for environments where a prolonged fire exposure could occur. This classification is essential for fire investigators to understand as it significantly influences how a fire may behave within such structures, including its potential growth, spread, and the risks involved during fire incidents.

Other types of construction have their distinctions; for example, non-combustible refers specifically to materials that do not burn, while heavy-timber construction involves significant wooden elements that can contribute to fire load. Wood-frame construction, on the other hand, is typically more vulnerable to fire and would not qualify under Type 1 due to its combustible characteristics. Keeping these classifications clear helps fire investigators determine the behavior of buildings during a fire and establish appropriate safety measures.