Joint reinforcement is typically installed at which stage of wall construction?

Joint reinforcement is crucial for enhancing the structural integrity and stability of masonry walls. It is typically installed above the first course of blocks to provide continuous support throughout the height of the wall. This early placement allows the reinforcement to be integrated into the mortar joints effectively, ensuring that it works in concert with the masonry units as they are built up. This positioning is essential because it allows for proper bonding and alignment, maximizing the reinforcing properties of the joint reinforcement.

By placing joint reinforcement above the first course, it becomes embedded in the mortar joints of subsequent courses. This placement helps control cracking and improves the overall performance of the wall. The structural benefits are realized as the wall is constructed, maintaining a strong and stable assembly that can better withstand lateral forces and distribute loads effectively.

In contrast, other stages mentioned might compromise the benefits of the joint reinforcement or may not adhere to standard masonry practices. Therefore, installing it above the first course ensures that it aligns with best practices for masonry construction and reinforces the wall from an early stage.