The ceiling system should satisfy these requirements that using lower chord ball as fixed point, adapting space change of hyperboloid steel grid, grid settlement under snow load.
Concrete was poured in separately from mid-span of arch slab to the supports and then from the supports to the top chord of the arch chord so as to balance the pouring load.
The chord and web members are all seamless steel tube. The ANSYS software is used to analyze the structure bearing capcity under main load combinations.