A commercial building is being constructed with a floor system that includes wood joists and plywood sheathing. Which of the following is the correct requirement for the minimum thickness of the plywood sheathing according to the 2021 International Building Code?
- 3/4 inch thick plywood
- B1/2 inch thick plywood
- C5/8 inch thick plywood
- D3/8 inch thick plywood
Exam tip
Always check the specific code section for the correct thickness requirements.
Why A is correct
The 2021 IBC requires that plywood sheathing used in floor construction be a minimum of 3/4 inch thick to provide adequate strength and rigidity.