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Fundamental period

Period (time needed to complete a seismic wave cycle) in seconds is given for each of the following: equipment (filing cabinet), one-story structure, 4 stories, 10-20 stories, 70 story skyscraper.
What is the primary determinant of a building's fundamental period?

AnswerBuilding height more than its structural system, materials or proportions determines its period. Rule of thumb: period = # stories / 10
ARE 4.0 exam prep: SS

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