Retaining walls are part and parcel of hillside living but fixing them post earthquakes has brought repair and insurance challenges.
Retaining wall specifications nz.
The new zealand building code and so should be securely and safely constructed.
You need a building consent to build a retaining wall that will be.
The type of soil.
Other permissions you may need if the work will encroach on the.
This information is published by the ministry of business innovation and employment s chief executive.
Retaining wall guidelines ministry of business inovation and employment mbie has released technical engineering guidance on the seismic design of residential retaining walls in the port hills.
B1 2 which states buildings building elements and siteworks.
It includes drainage behind the wall which is an essential part of any retaining wall construction.
This guide describes a 1 2 metre high cantilevered timber wall which consists of vertical posts embedded in the ground supporting horizontal rails.
If you re not sure if your retaining wall will be load bearing we recommend you talk to an engineer.
Firth keystone retaining wall system lightweight easy to handle and requires no special tools.
Retaining walls that are over 1 5 m high and those supporting a surcharge require a building consent see figure 1.
Regardless of whether a building consent is required retaining walls must comply with the requirements of the new zealand building code clause b1 structure.
It is a general guide only and if used does not relieve any person of the obligation to consider any matter to which the information relates according to the circumstances of the particular case.
Www nzwood co nz how to build low retaining walls 2 construction steps planning and measuring 1.
A 150 mm square post can be placed at up to 910 mm centres the 10 mm allows a fitting.
The spacing of vertical posts will depend on the size of post and rails used.
More than 1 5m high at any point.
Hiring professionals and tradespeople.