What minimum fire resistance is required for Type I construction?

Type I construction, also known as fire-resistive construction, is designed to withstand fire exposure without being compromised for an extended period. The minimum fire resistance rating for structural elements in Type I construction is typically set at 2 hours. This means that the building's structural components, such as columns, beams, and walls, must be able to resist fire for at least 2 hours to protect occupants and enable firefighters to conduct operations safely.

The rationale behind this requirement lies in the need for sufficient time to evacuate occupants and for emergency responders to manage a fire effectively. By having these firerated components, Type I structures provide a safer environment during a fire emergency compared to other construction types that may have lower fire resistance ratings or none at all. Such stringent requirements are crucial in terms of building codes and safety regulations, aiming to minimize the risk of collapse and facilitate evacuation during a fire event.