(BEIJING, August 29) -- Installation of the soundproof, 53,000 sq m of PTFE inner membrane structure for the National Stadium began Tuesday.
Both the National Stadium and the National Aquatics Center will feature membrane structures, but the National Stadium will have two membranes -- a transparent snow and rain-proof ETFE membrane on the upper levels of the stadium's steel structure and a cream-colored PTFE membrane hung from the steel structure to ensure sound insulation inside the stadium.
With the PTFE inner membrane structure in place, every spectator in the National Stadium will be able to clearly hear announcements on the broadcast system.
A total of 110,000 sq m of ETFE and PTFE membrane will be installed at the National Stadium, surpassing the membrane coverage area of the water cube. Installation will be completed later this year.
