Piles can be classified into three basic types with respect to load transmission and function:
•End bearing piles—those piles that transfer their imposed load onto a firm subsurface stratum.
•Friction piles—those piles that carry their load by the adhesion friction of the soil along the entire surface area of the pile.
•A combination of friction and end bearing.A cast-in-place concrete pile placed via a steel form where a large bulb has been forced into the end bearing bottom.This pile is also known as a Franki pile for its originating company.
Pile foundations can be prepared using timber, steel, concrete, or fiberglass pilings.Each type has a unique characteristic.
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