Which type of brick has a partially hollow cross-section?

The type of brick that has a partially hollow cross-section is the hollow core brick. These bricks are designed with empty spaces or cores that reduce their weight and improve thermal insulation. The hollow design also allows for better handling and easier transportation compared to solid bricks.

Hollow core bricks are commonly used in construction for non-load-bearing walls where thermal efficiency and lighter materials are beneficial. They can also provide better sound insulation due to the air spaces within them. This type of brick is particularly advantageous in modern construction techniques, offering both functional and economic benefits.

The other types of bricks listed do not possess the same characteristics. Solid bricks are entirely solid without any voids, while facing bricks are specifically designed for aesthetic purposes often used on the exterior of buildings. Refractory bricks are designed to withstand high temperatures and are typically used in kilns or furnaces, but they don’t have a hollow structure.