Why use post tension slab? | What is the purpose of a post tension slab?

Why use post tension slab

Post-tensioned slabs are typically flat slabs, band beams, and corrugated slabs or slabs. 

PT slabs offer the thinnest type of slab, since concrete is worked with its strengths, staying mainly in compression.

Longer spans can be achieved due to prestressing, which can also be used to counter deviations.

Post-tensioned slabs use high tensile steel strands to compress the slabs, keeping most of the concrete in compression. 

This provides a highly efficient structure that minimizes the use of materials and lowers the range of economic reach compared to reinforced concrete.

Advantages of post tensile slabs

Structural durability

Post-tensioned slabs show reduced cracks, increased durability, and lower maintenance costs.

 Its deviation can be controlled by varying the amount of post-tensioning to balance any part of the loads applied immediately after stress.

Architectural benefits

The post-tensioned slab has an advantage over others, as it is a very efficient base for the design of floors with thin slabs and spaces without columns in larger sections. 

It gives the architect the freedom to work freely with her designs.

Reduces dead load

Because post-tensioned slabs are less thick, the amount of concrete and reinforcement used is reduced by up to 20% - 30% compared to conventional concrete slabs.

Commercial spaces

Post-tensioning results in thinner concrete slabs making valuable floor-to-floor height savings available as additional floors. 

This can provide cost effective additional space within the same overall height of the building.

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