What is the MINIMUM overlap when ceiling joists must be overlapped above a loadbearing partition? 3^n 6'' 12^n 18''

The minimum overlap when ceiling joists must be overlapped above a loadbearing partition is typically specified by building codes and construction standards. According to the International Residential Code (IRC), the minimum overlap for ceiling joists above a loadbearing partition is 3 inches (3").<br /><br />Therefore, the correct answer is:<br />$3''$<br /><br />This ensures that the joists are properly connected and can bear the loads imposed on the partition effectively.