The cost of ignoring it
Structural capacity problems don't announce themselves politely. Deferred strengthening constrains how a building can be used — floor loads, fit-outs, change of use — and emergency propping is the most expensive structure you'll ever rent.
The problem, plainly
Buildings get asked to do things they weren’t designed for — heavier floor loads, new plant, penetrations cut through slabs, corrosion-reduced sections, or defects that were built in. Strengthening restores or adds capacity without demolition: externally bonded carbon fibre, bonded steel plates, enlarged sections or supplementary structure.
Diagnostic approach
Strengthening starts with knowing what exists:
- As-built verification — cover meter and GPR scanning to locate reinforcement, measure cover and confirm member sizes
- Material testing — concrete strength (cores or rebound calibrated by cores) so the design uses real properties
- Condition assessment — corrosion, cracking and section loss quantified before capacity is calculated
- Load-path review with the engineer — the defect you can see is not always the member that needs strengthening
Methodology
For CFRP systems: substrate prepared by grinding to sound, laitance-free concrete; profile and moisture verified; adhesion pull-off tested; laminates or fabrics applied to the engineer’s layout with wet-out and lap requirements per the system manual; cure conditions logged; protective/fire-rated coatings where specified.
For steel and section works: engineered temporary works where required, connection details as documented, protective coating systems for design life.
Handover includes the full QA record set for engineering certification.
Where this shows up
Slab strengthening for new plant or use change, beam and column capacity restoration after corrosion repair, transfer structure upgrades, penetration trimming, balcony and balustrade anchorage upgrades to current codes.