CONFIGURATION IRREGULARITIES
Plan (Horizontal)Structural Irregularities
1a - Torsional Irregularity
1b - Extreme Torsional Irregularity
2 - Re-entrant Corners
3 - Diaphragm Discontinuity
4 - Out-of-plane Offsets
5 - Nonparallel Systems

Vertical Irregularities
1a - Stiffness Irregularity -Soft Story
1b - Stiffness Irregularity - Extreme Soft Story
2 - Weight (Mass) Irregularity
3 - Vertical Geometry Irregularity
4 - In-plane Discontinuity in Vertical Lateral Force Resisting Elements
5 - Discontinuity in Capacity - Weak Story

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