Part 3C of our Ghosts of Pattullo series covers the engineered removal of the ~400-tonne ULMA MK falsework used to cast the tower crossbeams of the stal̕əw̓asəm (Riverview) Bridge. With crane removal impractical after casting, the system was captured and lowered as a whole using synchronized strand jacks under strict wind limits, then dismantled at a safe working elevation.

Temporary friction brackets were engineered to transfer up to 1,500 kN of falsework reaction into the Pattullo Bridge tower legs during crossbeam construction. This article explains the performance requirements, structural mechanism, redundancy in load path, and why post-tensioned clamped corbels provided a safe, practical, and removable solution.

This article explores the engineering behind the ULMA MK truss falsework used to cast the tower crossbeams of the stal̕əw̓asəm (Riverview) Bridge. Through detailed staged 3D analysis, the system’s strength, stability, and evolving load paths were verified under gravity, wind, concrete pressure, and construction sequencing.