COMPLETE ETABS TUTORIALS : https://www.youtube.com/watch?v=zq0YbxzFN_I&list=PLDyhMW3kzPDAOR0UYuJaFNxv0e3cPlcUH SAP2000 TUTORIALS : https://www.youtube.com/watch?v=RzVVDp1CKE0&list=PLDyhMW3kzPDCDymHF3dplMvKcLRJYPC5F EXCEL SHEET DOWNLOAD : https://www.stuvia.com/doc/560503/stiffness-irregularity-check-of-soft-storey-checker Stiffness-Soft Story Irregularity: Stiffness-soft story irregularity is defined to exist where there is a story in which the lateral stiffness is less than 70% of that in the story above or less than 80% of the average stiffness of the three stories above. Stiffness-Extreme Soft Story Irregularity: Stiffness-extreme soft story irregularity is defined to exist where there is a story in which the lateral stiffness is less than 60% of that in the story above or less than 70% of the average stiffness of the three stories above. (Reference : ASCE 7-10 Chapter 12) Types of building irregularities In this video you will find what is soft storey What is soft story What is stiffness irregularity Lateral stiffness irregularity How to calculate stiffness irregularity using etabs How to check soft story in a building How to perform soft story check Types of building irregularities What is definition of soft story A soft story building is a multi-story building in which one or more floors have windows, wide doors, large unobstructed commercial spaces, or other openings in places where a shear wall would normally be required for stability as a matter of earthquake engineering design soft story structure retrofit plans soft storey building ppt how to avoid soft storey effect soft and weak storey definition soft story garage how long does a soft story retrofit take soft storey effect ppt #etabs #engineering #design