Heli-stage designed by ATAH, The CTC (China Textile Center) is an art & commercial complex in the Shaoxing, and will officially open in the summer of 2018. The project involves a mix of commercial typologies and will become the core of the Keqiao Science City in Shaoxing.

The Heli-stage of the CTC is the epicenter of the commercial complex and is correspondingly located at the main project entrance, which is the symbolic center of the entire project. Due to the background of the project, a unique structure with its own design language proposes to fuse the various commercial attractions with an artistic blast.
Model
The design concept involves a spiral form, blurring the boundary between floors, therefore connecting the exterior space with the interior, creating a continuous exhibition space.  In order to achieve such visual effect, a geometric web fuses onto a helical surface.  One will shuttle through both indoor and outdoor landscaping via the access staircase without being aware of the transition due to the blurring effect of the floors.  During an artistic presentation, performers seem to be walking towards the center of the stage via a slow spinning staircase. Photography: Shiromio
Structurally, the design adopts a core-tube relationship:

The main structure is the steel core in the center, which houses a central air well, and an elevator.

The changing geometry of the staircase from the first to the third floor is directly tangential to the structural steel c...