When using galvanized screws to mount plywood, what is the minimum additional length of screws required?

When mounting plywood with galvanized screws, the minimum additional length of screws required is 12.7 mm (0.5 in). This specific length ensures that the screws penetrate adequately into the underlying structure for secure attachment. The use of an appropriate length is critical for achieving the necessary pull-out resistance and overall stability of the mounting.

Having a screw that is 12.7 mm longer allows for optimal engagement with both the plywood and the underlying framework, which is particularly important in applications where load-bearing strength may be a consideration. It helps in preventing any potential issues with fastening failure, such as the plywood pulling away from the mount under stress.

Choosing a length shorter than this could compromise the strength of the mounting, making it unsuitable for applications where durability and strength are needed. Thus, utilizing screws with a minimum additional length of 12.7 mm is essential for ensuring a reliable and durable installation.