... in "World Trade Center Building Performance Study: Data Collection, Preliminary Observations, and Recommendations" (FEMA 403), January 2002, page 2-27
Chapter 2: https://www.fema.gov/pdf/library/fema403_ch2.pdf
Full report: https://www.fema.gov/sites/default/files/2020-07/fema_403_2002.zip...