Design Memorandum



TO:                  All Design Staff

FROM:            Bijan Khaleghi
DATE:             October 7, 2012
SUBJECT:       Structural Design Recommendations of CFT and RCFT for Bridge Foundation


This design memorandum allows steel casing to be considered in the structural capacity of piles, shafts, and connections of pile-to-pile cap and column-to-shaft Foundation. This memorandum provides guidance for structural design of concrete filled steel tubes (CFT) and reinforced concrete filled steel tubes (RCFT) for bridges and other structures foundations. Use of CFT and RCFT requires approval from the WSDOT Bridge Design Engineer.   read more....



If you have any questions regarding these issues, please contact Anthony Mizumori at 360-705-7228, Geoff Swett at 360-705- 7157, Chyuan-Shen Lee at 360-705-7441, or Bijan Khaleghi at 360-705-7181.


cc:   Mark Gaines, Bridge Construction - 47354

       F. Posner, Bridge and Structures 47340