Residential Building Inspector B1Wall Construction and Wall CoveringsMedium
A residential building inspector is reviewing plans for a new home. The plans show an interior non-load-bearing partition wall framed with 2x4 studs. The wall is 12 feet in height. What is the maximum allowable spacing for the studs in this wall?
- A32 inches on center
- B48 inches on center
- C16 inches on center
- D24 inches on center
Show answer & explanationAnswer & explanation
Correct answer: C. 16 inches on center
According to IRC Table R602.3(5), for 2x4 non-load-bearing interior walls with an unsupported height of 12 feet, the maximum allowable stud spacing is 16 inches on center. This ensures stability and adequate support for wall finishes.
Why the other options are wrong
- A. 32 inches on center is typically not permitted for 2x4 studs in residential wall construction, especially at this height.
- B. 48 inches on center is far too wide for 2x4 studs in any standard residential wall application, load-bearing or non-load-bearing.
- D. 24 inches on center is generally allowed for non-load-bearing walls up to 10 feet high, but not 12 feet with 2x4s.
Non-Load-Bearing 2x4 Stud Spacing (High Walls)
For 2x4 non-load-bearing interior walls with an unsupported height of 12 feet, the maximum stud spacing is 16 inches on center.
- Applies to non-load-bearing interior partition walls.
- Height significantly impacts allowable spacing.
- Refer to IRC Table R602.3(5) for specific stud spacing limits.
Memory trick: Twelve feet high, a 2x4 non-load wall needs to be 'Sixteen' inches tight.