Which type of construction uses heavy timber?

Heavy timber construction is characterized by the use of large, solid wood components that are typically at least 5 inches in thickness. This type of construction is designed to be robust and durable, making it ideal for structures that require significant strength and stability, such as commercial buildings, warehouses, and some types of residential structures.

In heavy timber construction, the wood elements are often exposed, providing both aesthetic appeal and structural integrity. The fire resistance of heavy timber can also be advantageous, as the mass of the timber allows it to resist fire for a longer duration compared to lightweight wood structures which can quickly fail in a fire scenario.

This type of construction differs fundamentally from lightweight construction, which uses smaller and lighter wood pieces that can be more susceptible to fire and collapse. Steel framed and concrete block constructions utilize entirely different materials and methods for building, further distinguishing them from heavy timber construction. Therefore, when considering types of construction that specifically utilize heavy timber, the answer clearly aligns with heavy timber as the correct option.