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Piers are columns that are designed to support a specific point of
contact on a support beam or girder. In modern construction,
they are usually made with poured concrete or concrete blocks (CMU)
and supported by a pad footing. Piers are also constructed with stone,
brick and
wood.
Piers (CMUs) are commonly used in crawlspaces as a supplementary support to prevent the over-spanning of beams
and girders. Concrete piers are commonly used to support
porches and decks. Also, concrete piers are used as an inexpensive
primary support system for small additions to the home, in place of a continuous
foundation wall and footing.
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