Answers to questions about residential green zone technical categories
The announcement of technical categories for foundation systems for residential properties in flat areas has prompted questions from Christchurch property owners.]
The technical categories – TC1 (grey), TC2 (yellow) and TC3 (blue) describe the foundation systems most likely to be required in the corresponding areas on the maps. As this is an area wide classification, site specific geotech work will be required to determine the actual foundations required for each house in TC3 areas. In some cases this will mean TC2 level foundations will be enough in TC3 areas based on actual ground tests. This approach is common throughout New Zealand.
It is important to note that property owners only need to replace their foundations if their house needs to be rebuilt, or requires repairs to the foundations. Otherwise, no further action is needed (until you undertake major renovations that affect your foundations).
Click here to read 17 Questions & Ansawers published in Saturday 12 November 2011 edition of The Press
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