What is the minimum distance that end joints shall be offset in double top plates?

What is the minimum distance that end joints shall be offset in double top plates?

• A. 12
• B. 36
• C. 24
• D. 48

Answer: (D)

The key idea is to stagger joints in the two top plates so the line of weakness doesn’t run through both plates at the same location. End joints in double top plates should be offset by a minimum of 4 feet (48 inches). This distance keeps the joints from aligning, maintains a continuous load path from the roof to the studs, and improves nail holding and structural continuity. If the offset were smaller, joints could align and create a weaker section through which loads transfer. The other distances listed are not large enough to meet this requirement.

The key idea is to stagger joints in the two top plates so the line of weakness doesn’t run through both plates at the same location. End joints in double top plates should be offset by a minimum of 4 feet (48 inches). This distance keeps the joints from aligning, maintains a continuous load path from the roof to the studs, and improves nail holding and structural continuity. If the offset were smaller, joints could align and create a weaker section through which loads transfer. The other distances listed are not large enough to meet this requirement.