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Association for Preservation Technology International:

Texas Chapter

SAH - APT Roundtable on the Structure of Skyscrapers in America

  • Wednesday, November 18, 2020
  • 12:00 PM - 1:30 PM
  • Virtual
The Society of Architectural Historians (SAH) and the Association for Preservation Technology International (APT) are pleased to present a conversation with Donald Friedman, PE, on his book, The Structure of Skyscrapers in America, 1871–1900: Their History and Preservation. In this long-awaited book, Friedman presents an illustrated history of the structural development of skyscrapers during the last quarter of the nineteenth century. In addition to contextualizing the emergence of this new building type, Friedman thoroughly explains the adaptive technology of its construction and examines the resulting preservation problems in depth. The book also provides construction dates and images for every known building taller than nine stories erected in the United States between 1871 and 1900—a total of 443 individual buildings, both extant and demolished, in 36 cities across the country. The conversation will include SAH and APT members.


  • Donald Friedman, PE
    Co-founder of Old Structures Engineering
  • David Fixler, FAIA, FAPT
    Architect and Lecturer, Harvard, GSD
  • Theodore H. M. Prudon, Ph.D., FAIA, FAPT
    Architect, Professor Columbia University GSAPP
  • Rachel Will, PE
    Associate Principal and Associate Director of Knowledge Sharing
    Wiss, Janney, Elstner Associates, Inc.

  • Bryan Clark Green, Ph.D., LEED AP
    Director of Historic Preservation, Commonwealth Architects
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