What it is
Tensioned high-strength steel puts the concrete into compression, cancelling the tension that loads would cause. It allows longer, thinner spans with fewer cracks.
Types and key points
- Pre-tensioned: steel stretched before casting (precast)
- Post-tensioned: steel stretched after the concrete hardens
- Used for bridges, long-span slabs and car parks
- Needs specialist design and equipment
Why it matters
It is rarely needed in independent homes, but you may see it in apartments with large column-free spaces.
How Elamentt handles it
For homes we design conventional RCC; prestressing is only used if a very long span truly needs it.