Arch Engineers took on a complex engineering challenge involving a truss bridge installation to support an Aerial Pipeline. The project required significant mid-lift modifications after construction mobilization. Originally, the plan involved installing the bridge in three sections onto two light piers. However, this changed on-site: the bridge now needed to be placed in two larger sections across abutments with a mid-air splice.
We began by revising the connection design to match the General Contractor’s updated installation strategy. This required a full reanalysis of the original design to ensure the new splice connection maintained both safety and structural performance. Our team developed revised details that supported the new placement method while preserving the bridge’s integrity.
Next, we addressed the second scope: reviewing and approving both the mid-lift splice and a modified rigging plan. The lift configuration shifted from an 8-pickpoint system to a 6-pickpoint one due to crane limitations. We verified that the updated rigging setup could safely manage the redistributed loads without exceeding crane capacities.
Despite the challenges, Arch Engineers delivered a practical, field-ready solution that kept the lift moving forward. Notably, the bridge’s installation supports a critical Aerial Pipeline crossing—adding to the complexity and importance of the project. Our ability to adapt the lift mid-operation ensured a smooth transition and upheld site safety standards.
This project highlights Arch Engineers’ agility in high-stakes environments and showcases our deep understanding of structural behavior under real-world construction pressures.