A renovation project involves removing and replacing the existing floor framing in a commercial building. The existing floor joists are 2x8s. What is the minimum size of the new joists required if the span increases to 18 feet?
- A2x6
- B2x8
- C2x10
- 2x12
Exam tip
Always consider the increased span when determining the appropriate joist size for a renovation project.
Why D is correct
According to the 2021 IBC, for a span of 18 feet, a minimum size of 2x12 joists is required to ensure structural integrity.