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SHEAR WALLS 7.59
FIGURE 7.24 Plan irregularities (reentrant corners).
7.8.2 Horizontal Structural Irregularities
In many cases, diaphragms are not regularly shaped (e.g., diaphragms with offsets, with
reentrant corners, or with any kind of discontinuity), or they may be supported by vertical
elements that have different rigidities. In such cases, structures are said to have horizontal
structural irregularities. ASCE 7-05 Section 12.3.2.1 recognizes five types of irregularities
as listed in Table 7.6:
1. (a) Torsional irregularity, (b) extreme torsional irregularity
2. Reentrant corners irregularity
3. Diaphragm discontinuity irregularity
