Commercial Building Inspector B2Wall Construction and Wall CoveringsMedium
An inspector is reviewing the framing for an interior non-bearing wall in a commercial tenant space. The wall is 10 feet (3048 mm) high and framed with 2x4 wood studs. What is the maximum allowable spacing for these studs if the wall is not fire-resistance-rated?
- A48 inches (1219 mm) on center
- B24 inches (610 mm) on center
- C16 inches (406 mm) on center
- D32 inches (813 mm) on center
Show answer & explanationAnswer & explanation
Correct answer: B. 24 inches (610 mm) on center
For interior non-bearing walls framed with 2x4 wood studs up to 10 feet (3048 mm) in height, the maximum allowable spacing is 24 inches (610 mm) on center, according to IBC Table 2308.8(1) or similar prescriptive framing tables.
Why the other options are wrong
- A. 48 inches on center is generally not prescriptive for standard 2x4 stud walls.
- C. 16 inches on center is common but not the maximum for non-bearing walls of this height.
- D. 32 inches on center is typically allowed for taller or larger stud sizes, or specific conditions.
Wood Stud Spacing (Non-Bearing Interior)
Maximum allowable on-center spacing for wood studs in interior non-bearing walls, based on stud size and wall height.
- Non-bearing walls have less stringent spacing requirements than bearing walls.
- Stud size (e.g., 2x4, 2x6) and height are key factors.
- Table 2308.8(1) provides prescriptive limits.
Memory trick: Studs' space: height and size set the pace.