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Unstressed Modal case fundamental period/frequency is 1.828 seconds/0.547 Hz "Prestressed" Modal case accounts for P-delta large displacements fundamental period/frequency 0.587 seconds/1.702 Hz
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Unstressed Modal case fundamental period/frequency is 1.828 seconds/0.547 Hz "Prestressed" Modal case accounts for P-delta large displacements fundamental period/frequency 0.587 seconds/1.702 Hz
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