7.8.2 Bridge Layouts and Details

7.8.2.1 Final Bridge Layouts
After the PBLR (see
Section 4.4.5.1
) is approved, the bridge layout is finalized and detailed bridge design may commence.
Detailed design should not begin prior to approval of the PBLR.
7.8.2.2 Final Bridge Details
Bridge detail design includes determining superstructure and substructure of span bridges and culverts to handle design loads. Structure type is usually determined while preparing bridge layouts. Bridge details provide information for the contractor to build all structural elements.
Some things to consider when preparing final bridge details include:
  • Continued coordination with the roadway and drainage design is needed to update the bridge structures to accommodate any changes in roadway or drainage design. Obtain updates to any of the following:
    • Typical sections;
    • Alignments;
    • Superelevation and transition locations;
    • Pedestrian features;
    • Bicycle accommodations;
    • Required clearances;
    • Proposed utilities;
    • Roadway lighting;
    • Drainage conveyance method and hydraulic design;
    • Construction staging;
    • Resource agency commitments; and
    • Information regarding special issues such as sound walls on bridges and overhead fiber optic and power line restrictions.
  • BRG review of steel structures and spliced girders is required at each PS&E milestone (Initial/Detailed/Final);
  • Bridge design and detailing also includes retaining/sound walls, bridge rails, structural pedestrian features, lateral restraint, fender systems, utility attachments, bridge illumination, landscape/aesthetic components and drainage systems.