What type of construction primarily utilizes Class 4 load-bearing members?

Wood frame construction is characterized by the use of Class 4 load-bearing members, which are typically made of lumber. This type of construction relies heavily on the structural integrity of wood as its primary material for walls, floors, and roofs. The characteristics of wood frame construction include its adaptability, efficiency, and energy efficiency, making it a common choice for residential buildings.

Class 4 load-bearing members are important as they ensure that the structure can support both its own weight and imposed loads, which is critical for safety and stability. In wood frame construction, these members can be in the form of studs, beams, and joists, all working together to create a sturdy framework.

While steel frame construction, concrete block construction, and wooden post and beam construction each use different materials and methods for load-bearing structures, they do not primarily utilize Class 4 members as the main load-bearing elements as wood frame construction does. Understanding the distinction among these types of construction is key for those in fire services, as it directly impacts firefighting strategies, risk assessment, and building safety considerations.