Post-tensioning systems place tensile elements within or along concrete structures and tension them once the concrete has cured. That tension applies permanent compressive stress that counteracts the tensile stresses the concrete carries in service. Concrete held under compression deforms less and resists cracking, which extends the service life of the structure.
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Applications:Bridges
Buildings
Energy infrastructures
Post-Tensioning Systems in Modern Concrete Construction
Post-tensioning systems changed how concrete structures are designed and built, allowing thinner concrete sections, longer spans and more durable buildings that site constraints or architectural requirements would otherwise rule out. The same principle produced new construction methods that make bridges simpler, faster, and more cost-effective to build. Once these systems enter service, inspection of post-tensioning systems verifies tendon integrity and identifies problems such as corrosion or grout defects before they affect the long-term performance and safety of the structure.
Post-tensioning systems date from a patent filed by Eugène Freyssinet in 1928, and STUP (Société Technique pour l’Utilisation de la Précontrainte), founded in 1943 and renamed Freyssinet in 1976, proved these systems on thousands of structures. Post-tensioning systems are now universally recognized and specified for bridge, building, and industrial construction worldwide.
Post-tensioning systems give architects design freedom: complex curves, varying elevations and longer, unobstructed spans become buildable in concrete. Because compressed concrete spans a large distance without added depth, slender profiles replace the heavy sections conventional reinforcement would require.
Post-tensioning systems cut material volume by reducing the concrete and steel required in both the structure and its foundations. Lighter structures need smaller foundations, and precast elements tensioned on site assemble quickly, which shortens project schedules and lowers total build cost.
Post-tensioning systems reduce joints and produce nearly crack-free concrete, the two durability gains that matter most in service. In tanks, silos, and reservoirs, a compressed section resists the cracks that let moisture reach the steel, which slows corrosion and reduces maintenance requirements over time.
Post-tensioning systems also cut embodied carbon by reducing material volume. Producing and transporting less steel and concrete lowers greenhouse gas emissions, with reported carbon savings of 20% to 30% compared with conventionally reinforced equivalents.
Post-Tensioning Solutions for Every Structure
Design & Build Packages
Consulting and Design Services
In-House Manufacturing and Supply
To guarantee high-quality post-tensioning products worldwide, our industrial division, Freyssinet Products Company (FPC), manufactures prestressing anchors under strict quality standards. FPC is certified to ISO 9001 (quality), ISO 14001 (environment), and ISO 45001 (safety & health), ensuring reliability and sustainability. Freyssinet is the only post-tensioning specialist with in-house industrial expertise, a key advantage in quality control and product innovation.
Installation
Freyssinet crews handle installation on site: placing ducts and tendons, stressing them to the specified force and grouting. For nuclear and cryogenic applications, we develop specific grout formulations and test them before use, with technical support from our engineers throughout.
Inspection and Maintenance
Post-tensioning systems need periodic checks to stay in service. Our teams inspect tendons, anchorages and grout in existing structures, then scope the remedial work required to keep the structure performing over the long term.
Strand and Bar Post-Tensioning Systems
Post-Tensioning Strand Systems for Buildings
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More usable floor area
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Fewer columns and beams
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Longer service life
Post-Tensioning Strand Systems for Civil Engineering Structures
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Compact anchorage footprint
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Internal or external tendons
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Corrosion-protected by grouting
Post-Tensioning Bar Systems
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Re-stressable and removable
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Compact anchor plates
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Simple on-site handling
Post-Tensioning Strand Systems for Buildings
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More usable floor area
-
Fewer columns and beams
-
Longer service life
Post-Tensioning Strand Systems for Civil Engineering Structures
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Compact anchorage footprint
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Internal or external tendons
-
Corrosion-protected by grouting
Post-Tensioning Bar Systems
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Re-stressable and removable
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Compact anchor plates
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Simple on-site handling
Contact Freyssinet Today!
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