Infrastructure Development Code


The requirements for general undercutting, i.e. within gullies, for the fill foundations and below areas of cut, shall be as follows:

  1. All organic materials, other unsuitable materials and materials with undrained shear strength of less than that specified in the Contract Documents or instructed by the Engineer, shall be undercut.
  2. The depth of the undercut will be specified by the Engineer when the material at the subgrade level has been exposed and evaluated.
  3. On completion of the undercut, the surface shall be shaped, trimmed and compacted so as not to hold water.
  4. The Contractor shall treat any excavated undercut material as unsuitable and dispose of it accordingly unless instructed otherwise by the Engineer.

Definitions in this section

Contract documents