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<br /> <br /> <br /> <br /> <br /> <br />3rd & Broadway, Santa Ana, CA <br />Volume 2 - Structural Calculations June 17, 2024 | Project # S21043.00 <br /> pg. 57 <br />4.5 ETABS RESULTS: VERIFICATION OF VERTICAL IRREGULARITIES <br /> <br />Type Description <br />Applicable <br />RESI/HOTEL <br />Impact on <br />Structure <br />1a. <br />Stiffness-Soft Story Irregularity: Stiffness-soft story irregularity is <br />defined to exist where there is a story in which the lateral stiffness is less <br />than 70% of that in the story above or less than 80% of the average <br />stiffness of the three stories above. <br />No / No - <br />1b. <br />Stiffness-Extreme Soft Story Irregularity: Stiffness-extreme soft story <br />irregularity is defined to exist where there is a story in which the lateral <br />stiffness is less than 60% of that in the story above or less than 70% of <br />the average stiffness of the three stories above. <br />No / No - <br />2. <br />Weight (Mass) Irregularity: Weight (mass) irregularity is defined to exist <br />where the effective mass of any story is more than 150% of the effective <br />mass of an adjacent story. A roof that is lighter than the floor below need <br />not be considered. <br />Yes / Yes <br />RESI/HOTEL: <br />ELF Analysis <br />Method Not <br />Permitted <br />3. <br />Vertical Geometric Irregularity: Vertical geometric irregularity is defined <br />to exist where the horizontal dimension of the seismic force-resisting <br />system in any story is more than 130% of that in an adjacent story. <br />Yes / Yes <br />Hotel: ELF <br />Analysis Method <br />Not Permitted <br />4. <br />In-Plane Discontinuity in Vertical Lateral Force-Resisting Element <br />Irregularity: In-plane discontinuity in vertical lateral force-resisting <br />elements irregularity is defined to exist where there is an in-plane offset of <br />a vertical seismic force-resisting element resulting in overturning <br />demands on a supporting beam, column, truss, or slab. <br />No / No - <br />5a. <br />Discontinuity in Lateral Strength–Weak Story Irregularity: <br />Discontinuity in lateral strength–weak story irregularity is defined to exist <br />where the story lateral strength is less than 80% of that in the story <br />above. The story lateral strength is the total lateral strength of all seismic - <br />resisting elements sharing the story shear for the direction under <br />consideration. <br />No / No - <br />5b. <br />Discontinuity in Lateral Strength–Extreme Weak Story Irregularity: <br />Discontinuity in lateral strength–extreme weak story irregularity is defined <br />to exist where the story lateral strength is less than 65% of that in the <br />story above. The story strength is the total strength of all seismic -resisting <br />elements sharing the story shear for the direction under consideration. <br />No / No - <br /> <br />