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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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