Solution
Post-tensioned slabs
Post-tensioned slabs create long-span structures while optimising the amount of concrete and steel: thinner slabs, a lighter building and fewer columns. GEP provides design, supply and installation in Tunisia and abroad for car parks, hotels, offices, shopping centres and structures.
New
Specifications
Spans and thicknesses depend on each project and are set by our engineering office.
| Principle | Tendons stressed after the cast-in-place concrete has hardened |
|---|---|
| Components | Strands, ducts and anchorages |
| Standards | Designed and built to European standards |
Indicative values. For any use, refer to the construction drawings and applicable standards.
Uses
- Car parks
- Shopping centres
- Hotels and offices
- Open-plan spaces
- Civil structures, including bridge rehabilitation
Benefits
- Material savings: less concrete and reinforcement
- Long spans with fewer columns
- Better strength and crack control
- Faster construction and simpler striking
- Architectural freedom and large cantilevers
- Thinner slabs and a lighter building
How it works: 6 steps
Formwork
Formwork and props.
Passive reinforcement
Additional steel.
Prestressing system
Strands, ducts and anchorages.
Concrete pouring
After inspection.
Tendon stressing
Once the design strength is reached.
Striking
Strength achieved.
The principle
Post-tensioning means stressing high-strength steel tendons once the concrete has reached the strength set by the design. Their curved profile within the slab depth offsets loads and deflections.
Price and availability
Prices and stock are handled by the Comptoir GEP. Contact it for an up-to-date price, or request a quote for your project.
Frequently asked questions
What is post-tensioning?
Prestressing applied after the cast-in-place concrete has hardened: stressed, anchored tendons compress the slab so it spans further with less material.
How does it differ from hollow core slabs?
Hollow core slabs are precast and laid without propping, up to 15 m. Post-tensioned slabs are cast on site, then stressed: they suit very large spaces with few columns.
Which buildings is it for?
Car parks, shopping centres, hotels, offices, open spaces and structures that need long spans and few columns.
Do you work outside Tunisia?
Yes. GEP provides design, supply and installation in Tunisia and abroad.
Who carries out the design?
GEP's in-house engineering office designs and sizes the post-tensioned slab.
