What does Type IV Construction refer to?

Type IV Construction, often referred to as "Heavy Timber," is characterized by the significant use of large wooden components that can provide structural integrity and fire resistance. The defining feature of this construction type is that it typically has a fire resistance rating of 2 hours. This means that the structural elements are designed to withstand fire exposure for up to two hours without losing their load-bearing capabilities, which is crucial for the safety and stability of the building during a fire incident.

In Type IV construction, the heavy timber elements not only contribute to the overall aesthetic and structural strength but also play a significant role in fire safety due to their mass. Larger wooden members can take longer to ignite and will char at a predictable rate, providing some degree of protection against fire spread.

Understanding the construction type is essential for fire protection professionals as it informs the strategies for firefighting operations and resource allocation during emergencies, as well as influencing building codes and safety inspections.