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Subbase vs Subgrade - What's the difference?

subbase | subgrade |

As nouns the difference between subbase and subgrade

is that subbase is the lowest projecting part of a baseboard, a pedestal or a similar construct while subgrade is the layer of native soil on which the foundation of a road is laid.

subbase

English

Noun

(en noun)
  • (architecture) The lowest projecting part of a baseboard, a pedestal or a similar construct.
  • (mathematics) A certain subcollection of a topological space

    • Related terms

    * surbase

    See also

    * ("subbase" on Wikipedia)

    subgrade

    English

    Noun

    (en noun)
  • The layer of native soil on which the foundation of a road is laid