Birds’ Nest Stadium is one of the most unique buildings in the world. Its 60,00 m2 roof is manufactured from very complex and irregular steel structures from which over 50,000 shots of fireworks were to be fired from over 2000 launching positions.
The ETFE pellicle on top of the roof will melt down at 260 ℃, while the heat of conventional fireworks can be as high as 500℃ to 800 ℃. How to ensure intactness of the stadium canopy?
Through half year’s research and thousands of tests, Organizer made breakthroughs in non-residue technology and chemical recipes allowing for low temperature yet complete combustion. In addition to that, the team also custom made special fiberglass launching mortars that can stand extra high pressure. It was these critical technologies that made fireworks environmental yet meet required design effects.
It is absolutely unacceptable to make any damage or modification to the steel structure or canopy of the stadium. No welding, drilling, or any scratch to the protection paint was allowed. How to fix racks on top of the irregular stadium?
Through hundreds of times of calculation and modeling, Organizer designed a special racks that uses friction to tighten candles and mines.
How to ensure accuracy of launching angle while the angle of the steel skeleton can be as big as ±30°?
The organizer constructed an adjustable mounting structure composed of base and proper racks. The base platform’s four angles can be adjusted vertically to achieve perfect horizontal base for racks. In this way, the firing was kept at perfect angles across the whole site.