B08_Attachment_4_Harlequin_Bridge_Weight_Limits.pdf

This document is a Structure Load Rating inspection report for the Harlequin Bridge (Structure No. 9470 011P), inspected on 8/1/16. The report presents weight capacity ratings for five truck types under both normal traffic (inventory rating) and maximum load (operating rating) conditions, measured in both tons and metric tons.

The Harlequin Bridge accommodates Type H, HS, Type 3, Type 3S2, and Type 3-3 trucks with varying capacities. Under normal traffic conditions, inventory ratings range from 40 tons (Type H) to 50 tons (Type 3-3). Operating ratings for maximum loads range from 47 tons (Type H) to 57 tons (Type 3-3). The design loading standard is HS20 (MS18), and the load rating calculation meets or exceeds design load specifications, as indicated by the X marking in the capacity assessment. The load rating was calculated on 7/16 and is controlled by inventory L2L3 bolt strength and operating L2L3 slip resistance. The document also includes visual diagrams comparing conventional truck axle load configurations with design truck specifications, showing legal load distributions and wheelbase measurements for each truck classification.