Frequently Asked Questions - designing
The earthquakes in Canterbury have resulted in changes to design standards for retaining walls so that they better withstand any future seismic activity. This means that the design standards are more stringent, for example 'crib walls' no longer meet the design standards in many instances. These changes in the design standards are a good outcome for the people of Christchurch, as any new or rebuilt walls will be more resilient.
Many of the damaged "walls" provided protection to the soil surface only. The new walls are being designed and constructed to withstand future seismic activity. The structural walls will be rebuilt using several construction techniques and will be designed to the current Building Code and New Zealand standards including the revised hazard factors for Christchurch.
Yes, the walls will be designed to the current Building Code and the New Zealand Standards, including the revised hazard factors for Christchurch.