A Historical Review of Prestressed Concrete through Patents


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Title: A Historical Review of Prestressed Concrete through Patents

Author(s): A. Schokker

Publication: Special Publication

Volume: 231


Appears on pages(s): 33-48

Keywords: history; patent; post-tensioned; prestressed

Date: 10/1/2005

Prestressed concrete is a relatively young form of construction in the UnitedStates. The development of the various types of prestressing materials, includinganchorages was critical to the success of prestressed concrete as we know it today.This paper reviews the history of prestressed concrete with a focus on post-tensioningrelated patents in both the United States and abroad. Early patents from 1945 andonward are included up through the present day. The 1950’s and 1960’s are a primaryfocus as the decades where prestressed concrete was taking a foothold in the UnitedStates.