CSLB General Building (B)Framing and CarpentryHard
During a shear wall inspection, an inspector checks nail placement on the plywood sheathing panel edges. Nails placed too close to a panel edge risk splitting the wood and reducing shear capacity. What is the minimum standard edge distance for nails along sheathing panel edges?
- A3/4 inch
- B1 inch
- C1/8 inch
- D3/8 inch
Show answer & explanationAnswer & explanation
Correct answer: D. 3/8 inch
Standard nailing practice for structural wood sheathing requires a minimum edge distance of 3/8 inch from the panel edge to the center of the nail, reducing the risk of splitting the plywood or OSB while maintaining sufficient shear transfer capacity.
Why the other options are wrong
- A. 3/4 inch exceeds the typical minimum and may improperly reduce the panel's effective nailing pattern.
- B. 1 inch is unnecessarily conservative and not the standard minimum requirement.
- C. 1/8 inch is too close and would likely cause splitting at the panel edge.
Nail Edge Distance (Sheathing)
The minimum standard distance from a panel edge to the center of a nail, typically 3/8 inch, to prevent splitting while maintaining shear wall capacity.
- 3/8-inch minimum edge distance standard
- Prevents wood splitting at panel edges
- Applies to both plywood and OSB sheathing
Memory trick: Three-eighths keeps the edge from splitting to bits.