CSLB General Building (B)Framing and CarpentryMedium
A framing crew is installing a double top plate on a load-bearing wall. The building code requires that splices in the top plates be offset. What is the minimum offset required between splices in the two members of a double top plate?
- A16 inches
- B12 inches
- C24 inches
- D48 inches
Show answer & explanationAnswer & explanation
Correct answer: C. 24 inches
Building codes, such as the IRC, typically require that splices in a double top plate be offset by at least 24 inches for load-bearing walls. This ensures that the structural integrity of the top plate is maintained across the splice, preventing a single weak point.
Why the other options are wrong
- A. While 16 inches is a common stud spacing, it's insufficient for top plate splice offset.
- B. This offset is too short and generally not permitted for structural top plate splices.
- D. While a 48-inch offset would be structurally sound, it's not the minimum required and could lead to unnecessary material waste.
Double Top Plate Splice Offset
The minimum required horizontal distance between the end joints of the two individual members forming a double top plate, ensuring structural continuity and strength.
- Applies to load-bearing walls.
- Prevents a single plane of weakness at the splice.
- Typical minimum offset is 24 inches.
Memory trick: Two feet apart, for a plate that's smart.