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KITTITAS COUNTY <br />DEPARTMENT OF PUBLIC WORKS <br />field measured and thus accurately load rated using industry standard analytical procedures. The goal <br />of an Administrative Load Rating is to provide the County with a Load Rating report for a bridge in which <br />calculations cannot be performed without extensive research regarding the structural details of the <br />bridge reinforcement and concrete strength. Since calculations cannot be performed, the engineer will <br />rely on the material found addressing the bridge's history, including dates of construction, relevant <br />design codes of that period, truck live load historical patterns of use, and level of distress as evaluated <br />by the Consultant during the Site Visit. The Consultant will also review previous Bridge Inspection <br />Reports, and repair/ retrofit records as made available to the Consultant by the County. The Consultant <br />will, based on evaluation of the accumulated data, make a judgment regarding the capacity of the bridge <br />to sustain current Legal Loads, the Notational Truck Load, and Specialized Hauling Vehicle Loads. <br />Administrative Load Ratings will follow the procedures established in Section 5.02 C of the WSDOT <br />Bridge Inspection Manual. These procedures are based on field evaluation and documented engineering <br />judgment. <br />A site visit will occur for each bridge to be load rated. This site visit is not an inspection; rather it is an <br />opportunity for the Engineer to field verify conclusions from the last Bridge Inspection and to arrive at a <br />consensus regarding how well the bridge has performed over the course of its service life. The Site visit <br />evaluation will be performed by two licensed engineers who are also WSDOT Certified Bridge Inspectors <br />with many years of design, load rating, and inspection experience. In general, rating factors for the SHV <br />and AASHTO legal trucks will be determined by the ratio of moment demands of the legal trucks <br />compared to the design truck or assumed design truck based on the historical documents. <br />A signed Load Rating Summary sheet will be provided for each bridge along with a memo that will <br />include photos, recent inspection report, calculations (if applicable). <br />In addition:· <br />• Assume all updates to WSBIS will be completed by County. <br />• County to determine if any bridges shall be load rated for Emergency Vehicles and provide any <br />additional truck axle configurations to be rated. <br />Cost Breakdown: See attached. <br />Agency Signature: fR J 2-0 } (1 <br />Consultant Signature: Date: <br />--~~~~=------------------------ <br />06/07/17