Final Answer:
The type of building construction primarily uses large-dimensioned lumber that must have a minimum fire-resistance rating of 1 hour is C) Type III construction. (option C)
Step-by-step explanation:
In Type III construction, large-dimensioned lumber is primarily used, and it must have a minimum fire-resistance rating of 1 hour. This classification denotes a building construction type where exterior walls are made of non-combustible materials, while the interior structural elements, such as floors and roofs, utilize wood and other combustible materials. The requirement for a minimum 1-hour fire-resistance rating for the large-dimensioned lumber in Type III construction aims to enhance fire safety and prevent rapid fire spread within the structure.
Type III construction strikes a balance between the use of combustible materials for structural components and the need for fire resistance. The 1-hour fire-resistance rating ensures that the large-dimensioned lumber used in the building can withstand fire exposure for a specified duration, allowing for a safer evacuation and firefighting response. This construction type is commonly found in mid-rise buildings, where the use of wood is prevalent but must adhere to strict fire safety standards.
Understanding the nuances of building construction types is critical for architects, engineers, and builders to create structures that meet safety regulations and standards. In Type III construction, the careful selection and treatment of large-dimensioned lumber contribute to the overall fire resilience of the building, providing a balance between structural design and fire safety.(option C)