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Structural Impact of Construction Loads : [Technical Summary]
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    Technical summary.
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  • Abstract:
    Numerous bridge construction accidents have occurred because of construction loadings, which are an underemphasized topic in many specifications and design manuals. Bridge girders are least stable during the construction phase, so it is important for bridge designers and contractors to understand and design for conditions during this phase. The Indiana Department of Transportation’s current Standard Specifications contain limited construction load provisions and temporary bracing requirements; therefore this study was performed to identify and implement new requirements to proactively prevent construction accidents from occurring in Indiana. Various documents were examined in this study, including AASHTO and ASCE standards and the standard specifications and design manuals of other departments of transportation. Based on these documents, new falsework and formwork design loads, including horizontal loads, impact loads, and wind load, were developed and proposed. INDOT currently specifies only construction dead load and live loads. A set of drawings showing proposed minimum lateral bracing requirements was also created to help ensure the stability of prestressed concrete and steel girders during construction.
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