Allianz Tower
When Renaissance Tower was sold to Allianz in 2015, DeSimone engineered its transformation into Allianz Tower, a 40-story office tower at Istanbul’s eastern gateway.
The project features a reinforced concrete core braced with buckling-restrained brace outriggers at multiple mid-height levels. This system stiffens the core without adding excessive vertical mass—crucial for comfort and safety in Istanbul’s seismic and wind-prone environment.
| Client | Renaissance Construction (later sold to Allianz) |
|---|---|
| Architect: | FXCollaborative |
| Size | 40 stories above ground | 927,300 SF (86,150 SM) |
| Sustainability | LEED Platinum (first tower in Turkey to achieve it) |
| Office: | Dubai |
| Completion: | 2015 |
To provide column-free floor plates that align with open-office plans, we replaced traditional beam-and-slab design with a flat-plate slab structure. We also coordinated wind-load transfer from the glazed curtain walls through slab-edge embedments, curtain-wall anchors, and joint detailing to accommodate thermal movement and lateral pressures.
Double-height sky garden levels introduced diaphragm discontinuities that required additional reinforcement to resist local stress concentrations and support the structural glass enclosures. We also integrated a cantilevered metal scrim that wraps around three elevations to provide sun control and shading, tying its load path back into slab edges and perimeter framing. Throughout construction, we coordinated structural framing sequencing with façade installation to maintain schedule integrity and ensure interface stability.
With its crystalline form, world-class glass envelope, and first-in-country LEED Platinum core-and-shell certification, Allianz Tower reflects DeSimone’s role in delivering a technically advanced, high-performance commercial landmark.
