Prestressed

Definition

Prestressed refers to reinforcing strands installed in tension during concrete placement in the mold or form to increase the load capacity of a structural beam or deck slab.

Purpose

Prestressed concrete enhances the load-bearing capacity and durability of structural elements. By applying tension to the reinforcing strands, the concrete can resist tensile stresses, making it suitable for high-load and long-span applications.

Examples of Use

• Bridges: Providing strong, durable spans that can support heavy traffic loads.
• Parking Garages: Creating long, uninterrupted floor spans to accommodate vehicles.
• High-Rise Buildings: Supporting heavy floor loads and reducing column sizes.

Related Terms

• Post-Tensioning: A method of prestressing where the tendons are tensioned after the concrete has cured.
• Pretensioning: A method where the tensile force is applied to the steel reinforcing before the concrete sets.
• Reinforced Concrete: Concrete that includes steel reinforcement to improve its tensile strength.

Notes

• Installation: Requires precise control during construction to ensure the proper application of tension to the strands.
• Advantages: Increases the efficiency of concrete by allowing it to handle higher loads and span greater distances.