What is the minimum length of setting blocks for curtain walls?

The minimum length of setting blocks for curtain walls is specified as 4 inches. Setting blocks are critical components in the installation of curtain walls, as they provide support for the glass and help to manage the movement caused by temperature changes and other environmental factors.

Using blocks that are at least 4 inches long allows for adequate surface area to distribute the load of the glass more evenly, which helps prevent stress points that could lead to breakage or other issues. Additionally, this length ensures compliance with industry standards and recommendations for structural integrity and thermal performance. Thus, adhering to this minimum length is essential for the safe and effective performance of the glazing system.