15 foundation4.compressed

This document discusses different types of pile foundations that can be used for building construction projects. It describes preformed concrete piles that come in various sizes and can be percussion driven into place, with the number of locks varying depending on the pile size. Partially preformed piles are also discussed, which are composite piles of precast concrete combined with in-situ concrete or steel and in-situ concrete. These piles are suitable for medium to large contracts where bored piles would not work due to issues like running water or loose soils.