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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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