Bridge Rating Practices and Policies for Overweight Vehicles
TRB's National Cooperative Highway Research Program (NCHRP) Synthesis 359: Bridge Rating Practices and Policies for Overweight Vehicles explores overweight vehicle permit processes. The report includes information on state and provincial bridge rating systems, bridge evaluation practices, and permit policies as they relate to overweight and oversize vehicles. The report is designed to help in the understanding of the reasons for nonuniform permitting practices. The report reviews specifications, software types, treatment of nonstandard configurations, and allowance for in-place dead loads; processes of permit review; and personnel assigned to permit review.
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CHAPTER THREE NONUNIFORMIT Y IN PERMTITING SYSTEMS
CHAPTER FIVE EFFORTS POSSIBLY CONTRIBUTING TO IMPROVED
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AASHTO Standard Specifications Administration agency personnel allowed analyzed Annual permits ARHTO axle weight Bearing center bridge analysis Bridge Design bridge evaluation bridge load rating bridge rating BRIDGEWare Canadian carrier center to center CHBE considered distribution factor DOT Office engineering evaluation for permit ex ofﬁcio Federal Federal Highway Administration ft wide gage width girders govemment Highway Bridges impact impact factor Jurisdiction kips lever rule live load ln-house load carrying capacity load distribution load effects LRFD LRFR maximum MCEB NCHRP nonuniformity ofﬁces Ofﬁcials oment operating rating Overlay dead loads oversize oversize permits oversize/overweight overweight permits overweight vehicle permit checking permit loads permit policies permit review permit types permit vehicle procedures Processed Province rating if needed received if empty response received restrictions ridge route shear Single trip permit span length speciﬁcations state/province structure superloads synthesis Transportation Research Board truck Virtis Yes Yes Yes