(1)
Structures having any of the features listed in Table 4.1.8.6. shall be designated irregular.
(2)
Structures not classified as irregular according to Sentence (1) may be considered regular.
(3)
Except as required by Article 4.1.8.10., where the Seismic Category is SC3 or SC4, structures designated as irregular must satisfy the provisions referenced in Table 4.1.8.6.
Table 4.1.8.6. Structural Irregularities(1)(2)
Forming Part of Sentences 4.1.8.6.(1) and (3), Clause 4.1.8.7.(1)(c) and Article 4.1.8.10.
Notes to Table 4.1.8.6.:
(1) One- storey penthouses with a weight of less than 10% of the level below need not be considered in the application of this Table.
(2) See Note A-Table 4.1.8.6.
(3) See Article 4.1.8.7.
(4) See Article 4.1.8.10.
(5) Increased stiffness in storeys below grade need not be considered in the determination of vertical stiffness irregularity.
(6) See Article 4.1.8.15.
(7) See Sentences 4.1.8.11.(10) and (11), and 4.1.8.12.(4).
(8) See A rticle 4.1.8.8.