01 July 1997
(b) Precast Reinforced Concrete (PCRC). PCRC piles are made from concrete and a steel
reinforcement cage consisting of several longitudinal bars and lateral tie steel as shown in table 1-2. The
tie steel may be either hoops or a spiral. PCRC piles are usually replaced with precast prestressed piles.
(c) Precast Prestressed Concrete (PCPS). These piles are similar to reinforced precast concrete
piles, except that the longitudinal reinforcement steel is replaced by prestressing steel enclosed in a
conventional steel spiral (table 1-2). PCPS piles can usually be made longer than PCRC piles with the
same rigidity because of the prestressing.
(d) Concrete Post-tensioned Cylinder (CPTC). These piles are centrifugally cast into 16-foot-long
circular hollow sections (figure 1-1) using a low-porosity, high-density concrete with zero slump. Several
sections are bonded with a plastic joint compound to the required length, then Post-tensioned with
prestressing cables that run through holes cast in the pile wall.
Figure 1-1. Cross Section of a Concrete Post-tensioned Cylinder Pile.