What is the primary advantage of using post-tensioning in concrete structures?

Using post-tensioning in concrete structures primarily increases the load capacity. This method involves the use of high-strength steel tendons that are tensioned after the concrete has been cast and has achieved sufficient strength. The tendons create a compressive force within the concrete, which significantly enhances its performance under various load conditions.

Due to this pre-compression, post-tensioned concrete can better resist bending and shear forces, allowing for longer spans and thinner slabs without compromising structural integrity. This feature is particularly beneficial in applications like parking garages, bridges, and high-rise buildings, where enhanced load capacity directly translates into efficient design and construction.

While other factors like weight, fire resistance, and potential material cost savings play a role in the decision to use post-tensioning, the primary benefit remains the ability to support greater loads and improve overall structural performance.