Posted: 22 July 2014
This Building Controls Update is a periodic news bulletin for the building sector.
The 'Worked example 1 - Cantilever timber pole retaining wall' has been re-issued. The worked example has been revised to include consideration of bending failure of the poles below ground level, and to clarify some of the assumptions made in the calculations.
The revised worked example dated 15 July 2014 forms part of the guidance on the Seismic design of retaining structures for Canterbury which supports the guidance 'Repairing and rebuilding houses affected by the Canterbury earthquakes'.
There are a number of methods to design a cantilever timber pole retaining wall and this worked example presents the simplified gross pressure limit equilibrium method. A discussion on the various design methods ‘Embedded retaining walls – a guide to economic design C580 (2003)' is available to purchase on the CIRIA website.
Further worked examples for other types of retaining walls are under development.