The design is based on the rethinking and improvement of the conventional high-rise office building model with frame-core tube structural system and repetitive spatial pattern. The building’s Zigzag planar form and column-less interior space are not only results of its curvilinear shaped site, but also to generate more external corners which are of higher business values. An atrium is designed to connect the once isolated floors to encourage communication and evoke working vitality.
The building’s spatial design is based on that of a financial tower, bringing in flexible working area and shared space to encourage idea exchange. The first floor features an entrance hall and a bank operation hall; the second floor is dedicated to office space for the bank. The foyer stands in an atrium from first to third floor, leading the crowd into the building. The third through fourteenth floors are for standard business use. The peripheral area on a typical floor are used as office space for their beneficial natural lighting conditions. Column free, these areas are of high spatial flexibility can be further divided into individual offices, linear office space or opened working space. Shared atrium for working space are set to the third through fourteenth floor, with shared spaces of double height are located on every other floor. Equipment rooms, motor and non-motor vehicle garages, property management offices and other maintenance spaces are located in the basement.
The design adopts a core-in-core beamless structure system suitable for financial office towers. One of the greatest advantages of the beamless panel system is its full utilization of floor height, and thereby reducing the conventional building height and façade area, shortening the length of MEP pipelines, and ultimately reducing the overall cost of the building. The beamless floor cuts down the height of the MEP space above the ceiling to a merely 550mm. Altogether with the 350mm slab thickness the 100mm raised floor, a typical floor of 3.9 meters in height can generate a net height of 2.9 meters. As a result, 14 floors within a total height of 60 meters can be achieved. In addition, the dispersed layout of cores is beneficial to the formation of a reasonable structural span and the formation of the building peripheral space with excellent lighting conditions. The load-bearing structure is arranged on the periphery, and a large-span open office space without beams and columns is formed inside, which satisfies the need of the space requirement of the contemporary office space.
The building’s simple and subtle façade system is a transformation of its structural system. The 1.75m pacing of the exterior columns also creates a rhythm for windows. According to the solar altitude in Zhengzhou, the surface of the columns bears a certain angle of inclination, which helps shading extra sunlight and to avoid sun glare. On the first and second floors, adjacent columns are combined into a joint column with an enlarged pacing of 3.50m to open up the view for these spaces of more publicity. The third through fourteenth floors are offices and control rooms, so the column sections rotate at different angles to provide privacy and shading while ensure natural light condition. The thirteenth and fourteenth floors have the smallest columns cross sections which are narrow and long, allowing a panoramic view of the lake. The narrow columns cross section is widened at certain locations for privacy consideration and to create workspace for the building’s signage installation.