rock
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rock
Standards
- 1 strong material, including shaly material and strongly cemented sand or gravel, that does not soften in water or collapse under the combination of loading and wetting
- 2 material that cannot readily be excavated by a backhoe
Source - AS 2870-2011: Residential slabs and footings
HB50
strong material including shaley material and strongly cemented sand or gravel that does not soften in water or collapse under the combination of loading and wetting
Material that cannot readily be excavated by a backhoe may be taken to be rock. Rock is classified as igneous, sedimentary or metamorphic rock. For excavation work, rock is further classified as hard rock, soft rock or other than rock to indicate the degree of difficulty in removal.
See also: bedrock; boulder; hard rock <excavation>; igneous rock; metamorphic rock; other than rock <excavation>; sedimentary rock; soft rock <excavation>