Which construction feature is most commonly found in type 5 buildings?

In type 5 buildings, platform frame construction is a prevalent feature due to its cost-effectiveness and efficiency in residential design. This method involves constructing the building one level at a time, allowing for easier assembly and faster construction processes. Each floor can be built separately and supports the walls of the next, creating a stable and structurally sound framework.

Type 5 buildings are typically classified as "wood-frame" construction, and platform framing uses lightweight materials, such as wood, making them easier to work with compared to heavier materials like steel or concrete. This type of construction is common for single-family homes and small multi-family structures.

The other construction methods, while important in their contexts, are not characteristic of type 5 buildings. Steel frame construction tends to be more associated with type 1 buildings, which require enhanced fire resistance. Concrete block and masonry constructions represent type 2 and type 3 buildings respectively, which incorporate more robust materials for specific structural and fire resistance needs.