Transcription of Bridge Design Guide
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Bridge Design Guide
Bridge Design Guide Bridge Division January 2020 Bridge Design Guide 1- 1 TxDOT January 2020 Chapter 1 About this Guide Contents: Section 1 Introduction .. 1- 2 Chapter 1 About this Guide Section 1 Introduction Bridge Design Guide 1- 2 TxDOT January 2020 Section 1 Introduction Purpose This document presents guidelines for designing bridges in Texas. This document should be used in companion with the policies stated in the TxDOT Bridge Design Manual - LRFD. The main objectives of this document are to: Serve as a resource for engineers designing bridges for TxDOT. Provide guidelines specific to TxDOT policies, details, and Design assumptions. Updates Updates to this Guide are summarized in the following table. Guide Revision History Version Publication Date Summary of Changes 2018-1 August 2018 New Guide published. 2020-1 January 2020 Chapter 3: Additional Section 12, System Redundancy Evaluation for Steel Twin Tub Girders added to Guide . Appendix C, Steel Twin Tub Girder System Redundancy Simplified Method Guide , added.
Incidents of ASR have caused TxDOT to revisit mix designs and the attainable concrete strengths used in the fabrication of prestressed concrete products. Item 421, Hydraulic Cement Concrete, requires fly ash or other combinations of supplementary cementing materials to be used in all beam production. This will result in slower strength gains which
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