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3.2.4.1 Site classification

The Open link in same pagefoundation where the footing is to be located must be classified in accordance with AS 2870.

Explanatory information:

Open link in same pageTable 3.2.4.1 provides a general description of Open link in same pagefoundation soil types that will assist in the classification of the Open link in same pagesite. More detailed information, including differentiation between classifications, can be found in AS 2870 or alternatively contact the Open link in same pageappropriate authority.

Due to the limitations of this Part, if a Open link in same pagesite is classified as E or P then reference must be made to AS 2870 for design and construction information.

Table 3.2.4.1 GENERAL DEFINITION OF SITE CLASSES

Class Foundation
A Most sand and rock Open link in same pagesites with little or no ground movement from moisture changes
S Slightly reactive clay Open link in same pagesites with only slight ground movement from moisture changes
M Moderately reactive clay or silt Open link in same pagesites which can experience moderate ground movement from moisture changes
H Highly reactive clay Open link in same pagesites which can experience high ground movement from moisture changes
E Extremely reactive clay Open link in same pagesites which can experience extreme ground movement from moisture changes
A to P Filled Open link in same pagesites — see AS 2870
P Sites which include soft soils, such as soft clay or silt or loose sands; landslip; mine subsidence; collapsing soils; soils subject to erosion; reactive Open link in same pagesites subject to abnormal moisture conditions or Open link in same pagesites which cannot be classified otherwise
Note: For classes M, H and E further division based on the depth of the expected movement is Open link in same pagerequired. For deep-seated movements, characteristic of dry climates and corresponding to a design depth of suction change Hs, equal to or greater than 3 m, the classification shall be M-D, H-D or E-D as appropriate. For example, H-D represents a highly reactive Open link in same pagesite with deep moisture changes, and H represents a highly reactive site with shallow moisture changes.