Trelleborg Successful in New Zealand

Trelleborg Queensland Rubber was successful  in winning the order for the supply of the very large pot bearings required for the Waiwera Viaduct.The northern motorway extension from Orewa and Puhoi comprised of 7.5 km of road with twin tunnels, five bridges, two smaller viaducts and one 520 metre long viaduct at Waiwera.  The customer was an alliance comprising Transit N.Z. , Fulton Hogan, Leighton Contractors and URS as engineering consultants. 

Because of the extremely difficult geological conditions and the usual high seismic activity in the region, the bearings demanded very critical performance as well as high shear performance under seismic conditions.  The SLS varied over the sixteen bearings from 6140kN on one abutment to 21000kN on one of the central piers.  Critical corrosion protection requirements were also demanded because of the estuarine location.