Which construction type is the highest degree of safety?

Type 1 construction, also known as fire-resistive construction, is the highest degree of safety among the listed options. This type of construction is characterized by its use of non-combustible materials, such as concrete and steel, which are designed to withstand fire for extended periods. The structural elements, including floors, walls, and roofs, are constructed to provide significant resistance to fire, helping to prevent the spread of flames and smoke throughout the building.

This construction type is often utilized in high-rise buildings and other structures where the risk of fire spread must be minimized to ensure the safety of occupants and facilitate effective firefighting operations. The thermal properties of the materials used in Type 1 construction allow for a higher level of protection, prolonging the time before structural failure occurs in the event of a fire.

In comparison, the other construction types have varying degrees of fire resistance. Type 2 construction also uses non-combustible materials but may not be as robust as Type 1. Type 3 construction includes a mix of combustible and non-combustible materials, which can pose greater risks in the event of a fire. Type 4 construction, often referred to as heavy timber construction, has significant combustible elements, making it less fire