Existing reinforced-concrete and post-tensioned structures altered after construction — where strengthening and modification required close integration between engineering and execution.
The projects below were led and delivered by members of SigmaPhi's founding technical team in their prior professional capacities. We show them because they demonstrate the engineering experience behind SigmaPhi — not because they were contracted to SigmaPhi. As the company's own projects reach completion, they will be added here.
Change of use from residential to hotel apartments under revised loading. Following 3D scanning, coring and structural reassessment, strengthening included concrete jacketing of columns and transfer beams, and CFRP strengthening of beams and walls.
A stalled 41-storey tower revived with major layout changes. With no structural models available, the as-built condition was reverse-engineered, then strengthened by concrete and steel jacketing, CFRP and external PT — completing the post-tensioned slabs to the upper levels.
Strengthening and modification of a high-end villa to suit revised architecture — jacketing of walls, columns and beams and CFRP strengthening, coordinated with the architectural and MEP changes.
Full remodelling for a new interior — slabs and columns removed and added, and new MEP openings formed. Required a modification and strengthening scheme that maintained stability as structural elements were altered and reinstated.
A common thread runs through these projects: structures altered after construction, often while the asset remained in use, where the strengthening scheme had to respond to what was actually found rather than what the drawings showed.
Strengthening schemes on existing structures start with a model of the structure as it actually is — then the detail that a site crew can build.
We can walk you through the assessment, the scheme and how it was executed.