External Post-tensioning
External post-tensioning is a proven active strengthening method for upgrading existing structures, including bridges, buildings and tanks. It involves installing prestressing cables or bars outside the structural section, guided by deviators along the most effective load path.
These external tendons work together with the original structure to reduce stresses, control deflections, and improve crack performance.
Key Benefits:
- Increased Load Capacity: The structure accommodates heavier traffic, new usage requirements, or updated design standards
- Minimal Disruption: The strengthening work can often be done while the structure is still in use, including under live load, since it is an active strengthening method.
- Ease of Maintenance: Because the tendons, anchors, and guiding devices are all visible, they are easy to inspect, maintain, and replace.
At Interspan, our expertise in post-tensioning design and structural strengthening enables us to deliver tailored external PT solutions that restore performance, extend service life, and create long-term value for critical infrastructure.
