New Deep WSDOT Standard Sections Extend Spans of Prestressed Concrete Girders

摘要

align="left">This paper discusses the new deep precast, prestressed concrete girder sections that have been adopted as Washington State Department of Transportation (WSDOT) Standards. Members of the Pacific? Northwest Precast/ Prestressed Concrete Institute, in cooperation with WSDOT and other affected support industries, developed sections that are deeper and will span further than previously available? WSDOT Standards. Wider spacings and fewer girder lines can also be used for spans in the range of previous WSDOT Standards. The sections are available in both single-piece, pretensioned and multiple- piece, post-tensioned segmental versions. This paper discusses practical considerations in developing the concrete outline, pretensioned span capabilities, and handling and shipping considerations. An? appendix section provides sample handling and shipping calculations for the longest girder section and highest level of pretensioning.?