The ___ rating in the grade stamp on APA rated sheathing appears as two numbers separated by a slash.

The ___ rating in the grade stamp on APA rated sheathing appears as two numbers separated by a slash.

• A. Span
• B. Grade
• C. Density
• D. Strength

Answer: (A)

Span rating shows how far the panel can span between supports. In APA rated sheathing, the two numbers separated by a slash indicate the maximum spacing of framing members for two common applications. For example, a stamp reading 24/16 means the panel is rated to be used with rafters or joists spaced up to 24 inches apart in roof applications and up to 16 inches apart in other uses (like flooring or walls), depending on the specific use and panel thickness. This rating helps ensure the panel carries loads safely and isn’t used in a way that exceeds its structural capability. The other terms—density, grade, or strength—are represented differently and aren’t shown as a slash-separated pair on the stamp.

Span rating shows how far the panel can span between supports. In APA rated sheathing, the two numbers separated by a slash indicate the maximum spacing of framing members for two common applications. For example, a stamp reading 24/16 means the panel is rated to be used with rafters or joists spaced up to 24 inches apart in roof applications and up to 16 inches apart in other uses (like flooring or walls), depending on the specific use and panel thickness. This rating helps ensure the panel carries loads safely and isn’t used in a way that exceeds its structural capability. The other terms—density, grade, or strength—are represented differently and aren’t shown as a slash-separated pair on the stamp.