Ziraat Bank Headquarters

• LEED Platinum-certified 450,000 sqm HQ
• Twin 40- & 46-story seismic-zone towers
• CNC-fabricated 1,800-stone atrium

A twin-tower, 450,000 sqm corporate headquarters of this scale, curvature, and seismic-zone complexity is difficult to deliver without disciplined BIM/VDC coordination. KPF's design for Ziraat Bank combines two 40- and 46-story towers with an eight-story podium and a freestanding, nearly 1,800-stone travertine and 1,100-panel wood atrium auditorium, each panel individually curved and CNC-machined to fit a continuous, non-repeating geometry.

Aligning that level of custom fabrication with structural steel, MEP routing, and a seismic-resilient tensioned-cable system across 40+ story towers is the kind of coordination challenge that BIM/VDC modeling exists to solve, which is why GENx Design & Technology features this project in its portfolio of BIM Project Management and VDC work for architecture, engineering, and construction teams. 

The building's technology integration extends beyond design: automated ABB i-bus KNX lighting controls, double-deck elevators, and facial recognition access systems support day-to-day operational efficiency once occupied, while facade louvers tuned to solar orientation reduce cooling loads. The result, completed in 2025, is a LEED Platinum-certified headquarters whose curving profile references the Ottoman Tughra calligraphic signature while meeting the practical demands of a modern, technology-integrated corporate campus in an active earthquake region.

The project team had to reconcile a large, symbolically significant design brief with hard technical constraints: a curving, Tughra-inspired twin-tower profile in a highly active seismic zone; a freestanding atrium of nearly 1,800 individually curved travertine stones and 1,100 wood panels that had to be fabricated with automotive-grade CNC precision; large structural movement joints and a tensioned-cable system for earthquake resilience; and a LEED Platinum sustainability target that shaped the facade louvers, HVAC strategy, and lighting controls. Coordinating these interdependent systems across two 40-plus-story towers and an eight-story podium made rigorous BIM/VDC modeling a practical necessity rather than an option.

GENx does not publish a specific "before" workflow for this individual engagement, since the case study documents its own BIM/VDC modeling experience on the project rather than a client-side before-and-after transition. More broadly, architecture and engineering teams delivering towers of this scale and geometric complexity have historically relied on discipline-specific 2D drawing sets and separate structural, MEP, and facade models, coordinated manually through drawing overlays, RFIs, and physical mockups.

That approach leaves far more room for clashes and rework on a project with a curved twin-tower profile, a custom CNC-fabricated stone-and-timber atrium, and a seismic-resilient structural system, which is why integrated BIM/VDC coordination has become standard practice on comparable megaprojects.

GENx Design & Technology presents Ziraat Bank Headquarters in its BIM/VDC portfolio as an example of the coordination discipline required on megaprojects of this type, based on practical, on-the-job experience on the project. While GENx has not published independent ROI figures for this specific engagement, the completed building demonstrates the tangible outcomes that disciplined BIM/VDC coordination supports: a LEED Platinum-certified, 450,000-square-meter headquarters delivered with a structurally complex twin-tower and atrium design, in an active seismic zone, without compromising the architect's original curved-geometry vision.

Operationally, the building's automated ABB i-bus KNX lighting, double-deck elevators, and facial recognition access systems are built to reduce energy use and improve day-to-day efficiency for occupants, while orientation-tuned facade louvers cut solar heat gain and cooling demand. For teams evaluating BIM/VDC investment on large, geometrically ambitious projects, Ziraat Bank Headquarters is a real-world reference point for what accurate, coordinated modeling can help deliver.

Design architect: KPF, with A Tasarim Mimarlik as local architect of record. General contractor: Turner Construction. This project is presented in GENx Design & Technology's portfolio based on practical, on-the-job BIM/VDC experience gained while working on the project; it remains the property of KPF.