Land in the green zone has been divided into three technical categories – TC1 (grey), TC2 (yellow) and TC3 (blue). These categories describe how the land is expected to perform in future earthquakes, and also describe the foundation systems most likely to be required in the corresponding areas.
•Technical Category 1 (TC1, grey) – future land damage from liquefaction is unlikely. You can use standard foundations for concrete slabs or timber floors.
•Technical Category 2 (TC2, yellow) – minor to moderate land damage from liquefaction is possible in future significant earthquakes. You can use standard timber piled foundations for houses with lightweight cladding and roofing and suspended timber floors or enhanced concrete foundations.
•Technical Category 3 (TC3, blue) – moderate to significant land damage from liquefaction is possible in future large earthquakes. Site-specific geotechnical investigation and specific engineering foundation design is required. 作者: yapinghouse1 时间: 2014-12-28 07:36:31