B08_Attachment_1_Harlequin_Bridge_Weight_Limits.pdf

This is a Structure Load Rating document for the Harlequin Bridge (Structure No. 9470 011P) inspected on August 1, 2016. The document establishes weight capacity limits for various truck types under normal traffic conditions and maximum load operating scenarios. For inventory ratings during normal traffic, truck weights range from 40 tons (H-class) to 50 tons (TYPE 3-3), with metric ton equivalents provided. Operating ratings under maximum load conditions range from 47 tons (H-class) to 57 tons (TYPE 3-3). The design loading standard applied is HS20 (MS18), with the rating marked as meeting or exceeding design load requirements. Load rating calculations were performed on July 16, 2016, and are controlled by inventory L2L3 bolt strength and operating L2L3 slip resistance parameters.

The document includes detailed illustrations comparing conventional truck configurations with design truck specifications, showing axle spacing, load distributions, and legal load limits for each truck classification. Conventional trucks depicted include TYPE 3, TYPE 3S2, and TYPE 3-3 configurations with legal loads ranging from 25 to 82 tons distributed across multiple axles. Design trucks show H-class vehicles with 20-ton capacity and HS-class vehicles with 27 to 36-ton capacity, noting that design specifications vary between states. All technical specifications and visual references are intended to guide transportation authorities and commercial carriers on permissible vehicle weights and configurations for crossing the Harlequin Bridge.