Walking-induced vibration of steel-framed floors supporting sensitive equipment

Brad Davis, D. I. Liu

Research output: Contribution to specialist publicationArticle


This paper explains the vibration evaluation methods for floors supporting sensitive equipment in the second edition of AISC Design Guide 11, Vibrations of Steel-Framed Structural Systems Due to Human Activity. It presents new experimentally verified equations that are simplified for practical implementation. Sensitive equipment tolerance limits are stated in numerous forms, including peak acceleration and various spectral acceleration and velocity. For this reason, response predictions are given in terms of all tolerance limit forms that are commonly used. The most severe responses of lower frequency floors to walking are due to resonant buildups, whereas the most severe responses of higher frequency floors are due to a series of individual footstep impulses; equations are given for both. Because the sensitive equipment tolerance limit is objective, each equation includes a calibration factor that results in a high probability that the predicted response will exceed the actual response.

Original languageEnglish
Number of pages13
Specialist publicationEngineering Journal
StatePublished - 2019

Bibliographical note

Publisher Copyright:
© 2019, American Institute of Steel Construction Inc. All rights reserved.


  • Floors
  • Sensitive equipment
  • Serviceability
  • Vibration

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Building and Construction


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