The building that constructed in Ümraniye – İstanbul – Turkey is designed as the new headquarters for “Türkiye Finans Katılım Bankası” (Türkiye Finans Participation Bank) with 60.559 sqm total construction area including approximately 40.000 sqm commercial space. The major shareholder is one of the biggest public bank in Saudi Arabia , the National Commercial Bank (NCB). The other shareholders are Ülker Group and Boydak Group of Turkey. This multi-national partnership and the participational structure of the company and were taken into consideration to be emphasized during the design process. 33 storey building has five floors as basement in wider projection, three storey basement for parking and two floors for offices and social interaction spaces. The other twenty eight floors forms the tower. The main structure of building is designed as reinforced concrete system, however the first and the second basement floors are constructed by steel system.
Initial idea of the conceptual design derieved from the brand motto of TFKB, “Surplus value instead of consumption” and claiming to generate surplus value from the participation idea are described in design geometry. The conjectural power that generated in center by different forces moving through four directions of the brand logo is symbolized by a rhombus. In this context, this element formed to represent the constituted “production-based surplus value” and this three dimensional element was used in consequence as brand identity in the designed spaces.
Two major enterances were planned for the building. The first one is the main entrance from ground floor to access the tower part. The latter is the entrance lobby mostly used by staff in the second basement floor which can be approached both by walk or by staff shuttles. Perception of the brand identity had been emphasized by clarity of spaces in both of the entrance lobbies. The pattern of the natural stone which used for flooring and wall covering at the main entrance lobby is also applied at the ceiling as printed on PVC based stretch membrane. Further, the information desk is designed with the same material as floor covering to make an impression as it raises from the floor. The wall that emerges behind information desk which designed continuously through the central core that seperates the lobby and the cafeteria space is covered with black glass to give a sense of depth. By doing so, also the indication of the information desk had been improved with the intervetion of the black glass to the natural stone wall, only in that area. At the ground floor level a primary branch office of the bank has also been designed with a direct entrance.
Starting from the first floor, tower block contains meeting and office spaces of various operational units that planned as open offices. The vertical core of the building is surrounded by hidden cabinets at the open office floor levels to provide space required for future archival load and to prevent intensive usage of storage units between the work stations. Rhombus shaped wall lighting elements are integrated into hidden cabinet systems around the core to enhance consistency in the perception of the brand identity amongst relatively big and seperated spaces through the building. Wooden surface of the cabinets and wall coverings around the core add warmer touch and feeling to the gray color tone used in woven vinyl covering on the office floors and metal mesh suspended ceiling systems. Linear recessed floor parts with pebble stone and hidden lighting lines at the ceiling makes a clear distinction between horizontal and vertical surfaces as of the space.
The smaller prayer rooms tower office floors and the larger prayer rooms at the first basement floor are designed with the modesty by using the concrete effect to achieve the perceptual integrity between the office spaces and prayer areas.
To plan social interaction spaces at the office floor levels, atriums are formed by keeping floor slabs one axis shorter at every second floor through the facade that faces towards TEM highway. Identical meeting rooms are planned at the middle part of these galleries and two symmetrical interaction spaces were obtained at both sides of the meeting rooms. Singular trees with red leaves are placed into social interaction areas of the galleries to mimic the autumn of Istanbul and the trees are emphasized with dramatic lighting to be observed from perimeter of the building at night time with the goal of featuring the building as a landmark.
Administrative units are placed at the upper levels of the tower. Floor gardens at the standard office levels transform into bigger lobbies with urban park identity. The main meeting room of the board of directors had been planned to face towards the lobby with green space. With this planning it is aimed to emphasize the transparent and clear structure of the administration as well as to generate the feeling of being in garden and the ambience of a larger space.
Upper two storeys of tower rooftop are designed as a skylight structure and these levels studied in a disctinct approach. This space planned as a social interaction space for superior administrative executives and to hold important social events as dinners, cocktail parties and so on. To be planned as a mezzanine, 28th floor is formed around a Foster designed fireplace and seating units in order to give a panoramic view of İstanbul on that lounge area.
The entrance lobby at second basement floor which planned to be used mostly for staff usage is designed with the same approach as the main entrance lobby. However, the natural stone pattern used at the ceiling kept deliberately partial for the steel structure to be visually exposed. As being one of the most important aspects of the brand identity of TFKB, red color was used linearly in the middle of the partially applied natural stone patterned PVC stretch ceiling with a hidden light slot that splits the space and orients people into the building. Without additional lighting appliances, the lobby illuminated with the light generated by the hidden light projectors placed at the sides of this ceiling element and reflected via the specific reflectors which is on the visually exposed steel beams.
There are two bright inner courtyard gardens at the base part of the building covered with glass/steel skylights. One of these inner gardens is left inside the cafeteria as a dining hall to provide natural light to the space. On the other hand, the other garden is designed to act as a foyer of the seminar rooms and entrance lobby while pulmonically carrying the outdoor ambience to flow inside the building. At the same time these inner gardens provide natural light to the 500 seat big conference hall and also to the open offices at the first basement floor. Vertical glass tubes are designed for natural light that originates from skylights located at the roof garden of the first basement floor to penetrate up to the educational classrooms at the second basement floor. The educational zone is metaphorically considered as the heart of the building and planned as an academy with library, cinema hall, seminar rooms, two conference halls with permanent 200 seats and organizable 500 seats, thematic rooms, a virtual branch office and 15 educational classrooms in various sizes. Also three fitness halls, two large prayer rooms and various rentable areas are planned inside the complex.