D&E Post Tensioning – Structural Strengthening Systems
Engineered Post Tensioning Systems for Concrete Structures
D&E Post Tensioning delivers prestressed concrete solutions for civil, commercial, and structural engineering projects across South Africa. We specialise in the design, supply, and installation of post tensioning systems that improve load performance, reduce material costs, and extend structural lifespan.
Whether you’re working on high-rise buildings, bridges, parking decks, or large-span slabs, our team supports you from concept to completion. We provide full technical backup and ensure site-ready execution throughout the project.
Our Post Tensioning Capabilities
We offer full-service support for structural post tensioning projects, from engineered design to site delivery, repairs, and retrofits.
Design & Engineering Support
- Design of post tensioning systems and layout drawings.
- Use of Monostrand Post Tensioning System for streamlined slab performance.
- Technical support from initial design to final sign-off.
Supply, Installation & Stressing
- Supply and installation of high-strength post tension cables using calibrated cable tensioners (ideal for high tension cable installation).
- Professional on-site stressing to engineer’s specifications.
- Load transfer testing and on-site quality assurance.
- Full post tensioning service for bonded and unbonded systems.
- All stressing equipment is calibrated before use and verified annually to SABS standards.
Repairs & Modifications
- Repair of damaged post tensioning cables.
- Creation of openings in existing post tensioned slabs.
- Structural concrete repair and remedial work.
Where Our Systems Are Used
We supply structural strengthening systems for a wide range of project types. These systems have been successfully used in commercial office towers, logistics parks, and multi-level developments across Cape Town and the Western Cape:
- Multi-level commercial buildings and office parks.
- Bridge decks, overpasses, and transfer beams.
- Long-span concrete slabs and suspended floors.
- Car parks, podium decks, and large basements.
- Retaining walls, tanks, and water infrastructure.
- Structural retrofitting and load upgrades.
Why Use Post Tensioning?
Post tensioning enhances structural performance by:
Optimizing Slab Thickness & Reinforcement
Reducing slab thickness and reinforcement volumes.
Extended Spans & Design Freedom
Increasing span length and design flexibility.
Enhanced Crack Control & Durability
Improving crack control and structural resilience.
Thinner, Lighter Concrete Solutions
Allowing for thinner, lighter concrete sections.
Enabling Structural Design Innovation
Supporting architectural and engineering innovation.
Accelerating Construction with Faster Pours
Reducing construction timelines with faster pour cycles.
Technical Standards & Strand Details
- D&E uses only 7-wire plastic sheathed strand, compliant with B.S. 5896 super grade standards.
- Available sizes: 12.9 mm (U.T.S. 186 kN) and 15.7 mm (U.T.S. 265 kN).
- Initial stressing force does not exceed 80% of U.T.S.
Our systems meet SANS, EN, and international structural codes. Hydraulic jacks ensure controlled wedge draw-ins (up to 6 mm) during stressing.
The Anchorage System
Our systems use a reliable two-stage anchorage method for efficient load transfer:
Stage 1
Fixing – steel strands are fixed in place prior to the pour.
Stage 2
Stressing – tension is applied once concrete has cured.
We use both live and dead anchorages for accurate pre-stressing, improving load efficiency and crack resistance.
All anchorage components undergo static and dynamic load testing in accordance with BS 4447 to ensure safe load transfer.
Frequently Asked Questions
Do you supply and install post tensioning systems?
Yes. We provide complete turnkey services including cable supply, layout drawings, duct and anchor installation, tensioning, and final grouting.
Can you assist with structural design?
Absolutely. We collaborate with your structural engineers to optimise slab layouts, tendon positioning, and structural performance.
What is the typical cable size and grade?
We use 7-wire plastic sheathed strands in 12.9 mm and 15.7 mm sizes, manufactured to B.S. 5896 super grade standards with tensile strengths up to 265 kN.
How is quality controlled during tensioning?
All equipment is calibrated to SABS standards. Anchorages are tested to BS 4447 and stressing is monitored for force, elongation, and wedge draw-in to ensure performance.
Do you perform stressing and grouting on-site?
Yes. Our team handles on-site stressing, wedge setting, and grout injection to complete the bonded system and achieve load transfer.
Our Branch Network
D&E Group operates across the Western and Northern Cape to ensure fast and reliable access to steel products and support. Each location offers expert advice, product availability, and dependable delivery services.
We invite you to view full contact details, directions, and service options on our Contact page.
Explore Other D&E Group Services
Looking for more than just post tensioning solutions? D&E Group offers integrated steel and reinforcement services for construction, infrastructure, and agricultural applications.
Need Design or Supply Support for Your Post Tensioning Project?
Our experienced team is here to assist with technical design, cable specification, pricing, and site delivery. Let us help you simplify complex builds with proven post tensioning systems that perform under pressure.