To exempt buildings referred to in Sentence 3.2.2.6.(1) from the application of Articles 3.2.2.20., 3.2.2.23., 3.2.2.24., 3.2.2.29., 3.2.2.31., 3.2.2.36., 3.2.2.37., 3.2.2.38., 3.2.2.39., 3.2.2.48., 3.2.2.54., 3.2.2.62., 3.2.2.68., 3.2.2.72., 3.2.2.73., 3.2.2.78., and 3.2.2.80., which would otherwise require the structural members to be of noncombustible construction, and permit structural members of heavy timber construction.