Giving your building a new lease of life, engineered for the next 50 years.
Not every structural problem requires demolition. Structural retrofitting is the engineering process of strengthening or upgrading an existing structure to improve its performance, extend its service life, or enable it to carry additional loads. It is often the most cost-effective and sustainable solution.
Masterstone Engineering Ltd. provides specialist structural retrofitting and strengthening design services across Nigeria, helping building owners, investors, and facility managers protect and extend the value of their structural assets without the cost and disruption of demolition and rebuilding.
When is Structural Retrofitting Required?
- Adding additional floors to an existing building, where the original structure may not have been designed for the extra weight
- Changing building use, as converting a residential building to commercial use typically increases floor loads significantly
- Correcting structural deficiencies identified in a structural assessment
- Repairing damage from corrosion, fire, impact, or flooding
- Upgrading an older building to comply with current structural codes
- Extending the service life of a building beyond its original design life
- Reducing structural vulnerability in earthquake or wind-prone regions
Our Structural Retrofitting Techniques
Reinforced Concrete Jacketing
Wrapping existing reinforced concrete columns and beams with additional concrete and reinforcement to increase their load capacity. This is one of the most common retrofitting techniques in Nigeria and is particularly effective for increasing column axial and shear capacity.
Carbon Fibre Reinforced Polymer (CFRP) Strengthening
CFRP strips and wraps bonded to the tension faces of beams and slabs, or wrapped around columns, provide significant strength enhancement with minimal added weight and minimal disruption to occupants. This is an increasingly popular technique in Nigeria for beam flexural and shear strengthening.
Steel Plate and Angle Strengthening
Bolted or bonded steel plates and angles can be added to beams, columns, and connections to increase their structural capacity. This is a fast, practical retrofitting solution where speed of installation is important.
Post-Tensioning
Post-tensioning tendons can be added to existing beams or slabs to reduce deflections and increase flexural capacity, particularly useful for large-span structures experiencing serviceability problems.
Foundation Underpinning & Strengthening
Where foundations are inadequate due to poor original design, increased loading, or soil deterioration, we design underpinning schemes using mass concrete, micropiles, jet grouting, or enlarged pile caps to transfer loads safely to deeper, more competent ground.
Structural Wall Addition
Adding new reinforced concrete shear walls or steel bracing to an existing building frame can significantly improve its lateral stability, particularly important for taller buildings in wind or seismic zones.
Our Retrofitting Design Process
- Structural Assessment, We begin with a thorough assessment of the existing structure to understand its current condition and capacity.
- Structural Analysis, We model the existing structure and the proposed retrofitting measures to verify that the strengthened structure meets required performance levels.
- Retrofitting Design, We produce detailed designs for the chosen retrofitting technique, including material specifications, connection details, and construction methodology.
- Construction Supervision, We supervise the installation of retrofitting works to ensure quality and compliance with the design.