Post-tension (PT) construction has become standard for long-span concrete slabs in Dubai's high-rise buildings — it allows thinner slabs, longer spans and faster construction cycles than traditional reinforcement. But this efficiency comes with a hidden risk: cutting into a slab without knowing exactly where the tensioned cables run can be dangerous and structurally damaging.
What is Post-Tension Scanning?
PT scanning uses ground-penetrating radar or electromagnetic detection to locate the exact position and depth of post-tension cables and anchors within a concrete slab before any penetration work — drilling, coring, or cutting — takes place. The output is typically a marked-up plan showing safe zones and cable paths.
When PT Scanning is Required
- Before installing new MEP penetrations through an existing PT slab
- Before structural alterations or openings in high-rise buildings
- Before facade or balcony modification works
- As part of due diligence before purchasing or renovating a PT-constructed building
Post-Tension vs Traditional Reinforcement
| Factor | Post-Tension Slabs | Traditional Reinforcement |
|---|---|---|
| Span capability | Longer spans, thinner slabs | Shorter spans, thicker slabs typically required |
| Construction speed | Generally faster cycle times | Slower, more material-intensive |
| Risk during alterations | High — cables under tension, scanning essential | Lower — rebar generally safer to encounter |
What's Coming for Fortress Surveying
As more Dubai high-rise stock reaches the age where renovations and MEP upgrades become common, demand for reliable PT scanning before any penetration work is growing steadily. This is an area we are actively developing capability in — contact us to discuss your project's timeline and we'll let you know our current availability for this service.
Planning Works on a PT Structure?
Get in touch to discuss your project and our current scanning service availability.