Class 2 construction is characterized by which of the following?

Class 2 construction is primarily identified by its use of materials and structural components that provide a higher level of fire resistance than Class 1 construction. In this class, masonry walls are often employed, which can withstand significant exposure to heat and flames. The incorporation of wooden floors and roofs is typical in this type, striking a balance between the durability provided by masonry for structural integrity and the lighter, more cost-effective wooden elements. This combination allows for effective performance in terms of fire safety, supporting the structure while managing costs.

The other options do not align with the distinctive features of Class 2 construction. For instance, walls made entirely of metal are more characteristic of Class 1 construction, which uses non-combustible materials throughout. Similarly, walls made solely of wood would typically categorize as lower-class structures, as wood is more susceptible to fire damage. Lastly, concrete walls and roofs are reflective of Class 3 construction, which typically utilizes these non-combustible materials throughout the structure, enhancing its fire-resisting capabilities beyond what is found in Class 2.