Commercial Building Inspector B2Wall Construction and Wall CoveringsMedium
A commercial building inspector is examining the installation of a non-fire-resistance-rated interior wall in an office building. The wall is constructed with wood studs. What is the maximum permitted spacing for 2x4 wood studs in a non-bearing interior wall, when gypsum board is applied to both sides, assuming typical construction practices?
- A24 inches on center
- B32 inches on center
- C16 inches on center
- D20 inches on center
Show answer & explanationAnswer & explanation
Correct answer: A. 24 inches on center
According to IBC Table 2308.8(1), for non-bearing interior walls with 2x4 wood studs, the maximum stud spacing permitted when gypsum board is applied to both sides is 24 inches on center.
Why the other options are wrong
- B. 32 inches on center is generally too wide for wood studs with gypsum board, leading to excessive deflection and potential cracking.
- C. 16 inches on center is a common spacing for bearing walls or for stiffer non-bearing walls, but not the maximum for this scenario.
- D. 20 inches on center is not a standard maximum spacing for wood studs in this context.
Wood Stud Spacing (Non-Bearing)
The maximum allowable spacing for wood studs in non-bearing interior walls depends on the stud size and the type of wall covering to ensure adequate support and prevent excessive deflection.
- Spacings are found in IBC Table 2308.8(1).
- Non-bearing walls have less stringent spacing than bearing walls.
- Gypsum board application affects maximum spacing.
Memory trick: Stud's Span: Size, Skin, Support.