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Gridded

If there is to be full masonry on strip footings, the strip footings must be gridded on a maximum spacing of 6 metres in both directions.

Gridded strip footings ensure that the deep strip footings of the perimeter of the buildings cannot be pushed or tilted sideways by soil movement or soil pressures. This is a serious problem in high and extremely reactive clays.

Diagram of a gridded footing which consists of five joined rectangles, four of which are joined by the longer sides and the fifth is joined to the third rectangle by the shorter side. Around each rectangle is a band representing the strip footings.