Which type of brick is specifically designed to withstand freezing temperatures?

The correct answer is Grade SW, which stands for Severe Weather brick. This type of brick is specifically engineered to handle the stresses and challenges posed by freezing temperatures and moisture. Grade SW bricks have a lower absorption rate compared to other brick grades, which minimizes the risk of water penetrating the brick. When water enters the brick and subsequently freezes, it expands, which can cause cracking and damage. This type of brick is particularly important in climates that experience freeze-thaw cycles, as it ensures the durability and longevity of the masonry in harsh weather conditions.

Grade MW, which stands for Moderate Weather, is designed for less severe conditions and may not withstand freeze-thaw cycles as effectively as Grade SW. Grade NW, or Normal Weather, is suitable for dry areas with minimal weather stress, and Grade FW, or Fire Weather, focuses on fire resistance rather than cold weather resilience. These classifications highlight the importance of selecting the right brick type based on environmental conditions to ensure the integrity of construction.