Hyland Consultants were engaged by world leading bridge launching gantry design and build manufacturer DEAL of Italy to peer review and manage the certification process of the WCJO Launching Gantry. Hyland Consultants undertook the structural review and engaged Corkery & Associates to advise on Mechanical issues.  SGS (NZ) Ltd were engaged as Design Verifier and to undertake inspections for operating certification.

DEAL launching gantry during operations testing

The double three chord truss steel launching gantry crawls over the previously constructed piers then is used to place 55 tonne prestressed concrete super-tee units to span between the piers.

Hyland Consultants analysed and assessed the performance under short term construction, earthquake and wind loading conditions. Safe operating wind speed limits were agreed between DEAL, Hyland, Corkery and SGS, and procedures were set by WCJO to monitor wind forecasts and secure the gantry in the approved ways for the wind speed limits.

Launching gantry with Super-Tee precast concrete bridge beam