To limit the probability of discontinuity between top plates, which could lead to an inability to resist expected lateral loads, which could lead to the excessive deflection or failure of wall plates.
Where assemblies are required to provide fire resistance, this is to limit the probability of compromised fire resistance of the assembly, which could lead to harm to persons.
To provide a cross-reference to Sentence 9.23.11.4.(4) and thereby further define its application.