Post-tensioning is the construction methodology that is most commonly used to create "cast-in-place" prestressed concrete. Prestressed concrete can be produced by either the pretensioning method, where the reinforcing is "tensioned" prior to the concrete being placed, or by post-tensioning, where the reinforcing is "tensioned" after the concrete has been placed. The pretensioning method is used in the precast industry and for sake of economy requires that all of the prestressed elements be constructed in a regular shape with no dimensional variations. For example, all beams must be built of the same dimensions and slabs must be the same thickness for a project regardless of the element’s span length or the loading condition. This may not provide the most economical solution since the design of each element cannot be optimized. In today’s architecturally complex world, the "regular shape" requirement of precast pretensioned concrete is often times not possible. In order to meet these architecturally challenging applications while still providing a durable concrete structure, designers specify cast-in-place construction. Cast-in-place construction allows the engineer the flexibility to meet any geometric floor plan and to use varying section dimensions resulting in the most economical solution for the concrete application. Using post-tensioned reinforcement in cast-in-place construction affords the engineer an even more improved economical solution by reducing the depth of the structural elements. This reduction in depth optimizes the quantity of concrete required and also can reduce the overall weight of a structure which saves foundation costs and can reduce the overall height of a building saving in exterior cladding costs. Overall, a post-tensioned cast-in-place concrete solution for either a slab-on-ground application or a high-rise building floor system affords the owner, architect, and engineer the most cost-effective solution to meet today’s challenging construction environment.