Composite Piles

- Made up of two or more different materials (for example, steel and concrete).

- For a timber-concrete pile, the lower section of the pile might be timber, while upper section might be a concrete or even a steel shell pile. The timber part is installed below ground water due to its vulnerability to insect attack and decay above ground. The concrete or steel pile is then used above the ground water level.

The upper and lower portions of composite piles are made up of different material. For example, composite piles may be made of steel and concrete or timber and concrete. Steel and concrete piles consist of a lower portion of steel and upper portion of cast-in-place concrete. This type of piles is the one used when the length of the pile required for adequate bearing exceeds the capacity of simple cast-in-place concrete piles. Timber and concrete piles usually consist of a lower portion of timber pile below the permanent water table and an upper portion of concrete in any case, forming proper joints between two dissimilar materials is difficult and, for that reason composite piles are not widely used.

Pre-stressed concrete with steel H-section:

 – 60 ft to 200 ft in length,

– 30 tons to 100 tons capacity.

Concrete filled steel pipe:

– 50ft to 150 ft in length,

– Capacity varies.