Transcription of Foundation Manual Chapter4, Footing Foundations
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Foundation Manual Chapter4, Footing Foundations
CHAPTER 4 OCTOBER 2015 CHAPTER 4 Footing Foundations 4-1 Introduction Footing Foundations , also known as spread, combined, or mat footings , transmit design loads into the underlying soil mass through direct contact with the soil immediately beneath the Footing . In contrast, pile-supported Foundations transmit design loads into the adjacent soil mass through pile friction, end bearing, or both. This chapter addresses Footing Foundations . Pile Foundations are covered in Chapter 5, Pile Foundations -General. Each individual Footing Foundation must be sized so that the maximum soil-bearing pressure does not exceed the allowable soil bearing capacity of the underlying soil mass.
failure usually occurs on one side of the footing. Two examples of this failure are: 1. An isolated structure may tilt substantially or completely overturn. 2. A footing restrained from rotation by the structure will see increased stresses in the footing and column portions of the structure, which may lead to excessive settlement or collapse.
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