Transcription of 9-3 WIDENING XISTING RIDGES - Caltrans
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9-3 WIDENING XISTING RIDGES - Caltrans
MEMO TO DESIGNERS 9-3 MAY 2010 9-3 WIDENING EXISTING BRIDGES The WIDENING of an existing bridge presents a multitude of individual challenges during the planning and design phases, during construction, and throughout its service life. Special attention is required in both the design and detailing of the WIDENING in order to minimize construction and maintenance problems. A successful bridge WIDENING begins with a careful study of relative movement between the new and existing structure. Dead load and live load deflections (both short and long term), temperature movements, prestress deflection and shortening, settlement, seismic movement, basic structure continuity and stability, are all factors that must be tuned to provide a WIDENING that is structurally compatible with the existing bridge .
MEMO TO DESIGNERS 9-3 • M AY 2010 9-3 WIDENING EXISTING BRIDGES The widening of an existing bridge presents a multitude of individual challenges during the planning and design phases, during construction, and throughout its service life.
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