To limit the probability of discontinuity in the sheathing, which could lead to an inability to resist expected lateral or gravity loads, which could lead to the excessive movement, deformation or failure of exterior walls.
For exterior floors or environmental separators supporting a floor, this is to limit the probability of the excessive deformation, displacement or failure of required environmental separation elements, which could lead to deterioration, which could lead to compromised structural integrity, which could lead to excessive movement, vibration or deflection, which could lead to negative effects on the psychological well-being of persons.