What does the plywood strength rating indicate about span ratings?

The plywood strength rating primarily indicates the recommended distance between supports, which is crucial for understanding how much load the plywood can bear without failing. This rating reflects the structural performance of the plywood based on factors such as its thickness, construction, and quality.

When plywood is given a span rating, it informs builders and carpenters about how far apart the supports can be placed while still ensuring safety and integrity under typical loads. A higher span rating allows for greater distances between supports, making the material suitable for various applications, such as flooring or roofing.

In contrast, the weight of the panel, the recommended length of the panel, and the type of wood used, while all relevant to an understanding of plywood, do not directly relate to how the strength rating impacts structural support and load-bearing capabilities. Understanding the correct span from the strength rating is essential for proper installation and to avoid potential structural issues.