Which type of construction is defined as non-combustible?

Type 2 construction is defined as non-combustible because it is designed to resist fire by using materials that do not ignite easily or contribute to fire spread. This classification includes structural elements made of metal or concrete, which perform well under fire conditions due to their inherent properties. Type 2 construction is often used in commercial buildings and warehouses, where the goal is to delay fire development and reduce the risk of structural failure during a fire event.

Type 1 construction, while also non-combustible, is defined more specifically to include high-rise buildings with fire-resistive requirements across all structural components to enhance safety even further. Type 3 construction involves a mix of combustible and non-combustible materials, typically where the exterior walls are made of non-combustible materials, but the interior can include combustible elements. Type 5 construction, on the other hand, is fully combustible, utilizing materials such as wood, making it less fire-resistant than the other types. This clear distinction highlights why Type 2 construction is specifically categorized as non-combustible.