
Concrete Column Strengthening
Confinement, axial capacity and the seismic case the technique began with.

Column strengthening was the original use for seismic upgrades using composite fiber external strengthening. As the system developed over many years of university and Federal testing, numerous additional applications developed such as axial capacity enhancement, structural repair from corrosion damage, and bending and shear upgrades. Delta Structural Technology has the experience and team members that are required to address reinforced concrete evaluation and long term rehabilitation within structures subjected to damage and deterioration. Structures are subjected to differing environmental exposure, chemical exposure, load demands, and facility processes. Armed with the experience to properly identify the root cause of deterioration and failures within various environments, Delta provides the right repair methodology, high performance material selection, and qualified technicians needed to execute difficult projects safely, on time, and on budget.
Each structural member poses unique challenges regarding repair strategies. Whether your structure is experiencing extensive embedded metal corrosion or cracking and movement under dynamic equipment loads, there is a solution and a toolbox of proprietary technologies that will enable execution of successful repair strategies.

What a column is strengthened for
Columns fail in different ways, and the wrap is designed for the one in front of it. Confinement holds the section together and adds ductility; additional plies carry axial load where the column has to take more than it was built for; longitudinal reinforcement answers bending and shear. The same system covers a column that has lost section to corrosion and one that never had the reinforcement the drawings called for.

The first member composite wrap was used on, and still the one it suits best.
- 01
Confinement
Displacement-ductility enhancement and confinement of the existing section.
- 02
Axial Capacity
Axial load enhancement where the column has to carry more than it was designed for.
- 03
Shear and Bending
Strengthen for shear, single bending, double bending, flexural and moment increase, and torsion strengthening.
- 04
Seismic Retrofit
Meet the new code requirements set forth for each state.
- 05
Corrosion Damage
Structural repair from corrosion damage, and rehabilitation of distressed members to meet or exceed the strength intended for the original member.
- 06
Construction Errors
Supplement reinforcing steel that was cut for a penetration or placed wrong.
Concrete Column Strengthening on record
IndianaIndiana Bridge Pier Wrap
Glass-FRP protection over repaired bridge-pier columns.

Riverside Column Repairs
FRP column repairs coordinated around preparation and reinforcement inspections.
Texas Tech UniversityTexas Tech Mass Communication Strengthening
FRP strengthening coordinated with four-sided access to an existing column.


