Residential Building Inspector B1Wall Construction and Wall CoveringsHard
A builder is constructing a residential addition and plans to use 2x6 wood studs for a load-bearing exterior wall. The studs are spaced 16 inches on center. What is the maximum allowable unsupported height for this wall, assuming it supports a roof and ceiling only?
- A10 feet
- B16 feet
- C12 feet
- D14 feet
Show answer & explanationAnswer & explanation
Correct answer: B. 16 feet
According to IRC Table R602.3(5) for 'Maximum Allowable Spacing and Unsupported Height of Wood Studs', for a 2x6 stud wall spaced 16 inches on center supporting a roof and ceiling (no floors), the maximum unsupported height is 16 feet.
Why the other options are wrong
- A. This height is generally for 2x4 studs supporting a roof and ceiling only, or for 2x6 studs supporting a floor and roof/ceiling.
- C. This height is typically for 2x4 studs supporting a floor and roof/ceiling, or 2x6 studs supporting two floors.
- D. This height is not a standard maximum for 2x6 studs in this scenario.
Load-Bearing Wall Stud Height
The maximum unsupported height of load-bearing wood studs, determined by stud size, spacing, and the load (number of floors/roof supported).
- Found in IRC Table R602.3(5).
- Depends on stud dimensions and spacing.
- Considers roof/ceiling vs. floor loads.
Memory trick: Studs stand tall, but loads decide their fall.