To limit the probability of inadequate support for branch ducts, which could lead to excessive sagging and misalignment or opening of joints, which could lead to excessive air leakage, which could lead to an inability to maintain the minimum indoor air temperatures [see Sentence 9.33.3.1.(1)], which could lead to condensation, which could lead to deterioration, which could lead to compromised structural integrity, which could lead to harm to persons.