Arch Engineers Ltd. provided transportation engineering for the Dewdney Bridge girder delivery, supporting the general contractor with a practical, code-compliant plan to move large, straight steel bridge girders through public highways in British Columbia. Unlike curved or cambered girders, the straight geometry of the Dewdney girders allowed for a streamlined approach; focusing on stability, simplicity, and efficiency in both transport and handling.
Since no custom loading frames were required, Arch Engineers designed a straightforward tie-down and chain configuration. This setup minimized complexity while fully complying with BC’s provincial transportation regulations. Our team evaluated the bridge girder support points, load distribution across the trailer and jeep, and optimal chain-down locations to prevent transportation movement and torsional stress during transport. This simplified approach made loading and unloading easier, reduced handling risks, and improved flexibility in varying field conditions.
Although the structural profile presented fewer eccentricities, Arch performed standard checks for wind loads, shear forces, and dynamic effects. These analyses helped ensure the girders stayed secure in motion; especially while cornering, braking, or navigating changes in elevation.
Arch also created the lift plans for loading and unloading. A single crane performed the loading using rigging designed to maintain girder stability. At the destination, a two-crane tandem lift enabled safe and efficient unloading.