Structural Impact of Construction Loads
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2012-08-01
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Alternative Title:JTRP Technical Reports
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Edition:Final report.
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Abstract:Numerous bridge construction accidents have occurred across the country because of construction loadings, which are an underemphasized
topic in many DOT specifications and design manuals. Bridge girders are least stable when they are subjected to construction
loads, so it is important for design engineers and contractors to understand and design for these loads. The Indiana Department of
Transportation’s current Standard Specifications does not contain many construction load provisions, so this study was performed to
identify and implement new requirements to proactively prevent accidents from occurring in Indiana.
Various documents were examined in this study, including AASHTO and ASCE standards in addition to several other states DOT Standard
Specifications and Design Manuals. Based on these documents, new falsework and formwork design loads, including horizontal loads,
impact loads, and wind load, were developed and proposed to INDOT, which currently only specifys a dead load and live load. A set of
drawings showing proposed minimum lateral bracing requirements was also developed to help ensure the stability of prestressed
concrete and steel girders during construction.
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