World’s Longest Glass Pedestrian Bridge | GLASSCON GmbH – Architectural Building Skins, Façade Solutions, Curtain Walls, Glazing, Solar Shading, Brise Soleil
World’s Longest Glass Pedestrian Bridge

World’s Longest Glass Pedestrian Bridge

Over the Grand Canyon of Zhangjiajie stretches today the approx. 385 m length world's longest glass pedestrian bridge.

The record breaking bridge seems to float 300 meters (1,000 ft) above the ground, suspended between two mountain cliffs in Zhangjiajie park. The bridge is designed by Israeli architect Haim Dotan with visitors crossing 99 panels of clear glass on this see-through walkway to reach the opposite cliff. The slim bridge with its transparent glass base and its lateral suspension on carrying ropes is designed to withstand up to 800 visitors at the same time. The accessible VSG elements are 3 × 4 m in size and consist of three 16 mm thick glass panes and two SentryGlas interlayers. The execution of the VSG glass elements developed by the architects and planners is correspondingly robust with SentryGlas Ionoplast interlayers from Trosifol. The suspension structure allows a slender profile with only 60 cm wide supporting beams over the approximately 385 m span – which sets a record for a Chinese bridge construction.


Image © Zhangjiajie Grand Canyon Tourism Management Co., Ltd. Via Glaswelt
The bridge from the bird's perspective.

Six-month tests in the test laboratory
The integrated elements of VSG have dimensions of 3000 × 4000 mm with a total thickness of 50 mm. They each consist of three 16 mm thick discs of low-iron glass and two SentryGlas interlayers from Trosifol. The structure of the bridge and the glass elements were subjected to hard tests beforehand. These included six-month loads in the wind test laboratory at wind speeds of up to 56 m/s (about 200 km/h). In addition, the glass elements had to undergo extreme tests in which loads of up to 40t were applied. At a load of 20t, the deflections of the 3 × 4m discs were only 2.16 cm. The decision to use SentryGlas was at its best in terms of residual wear resistance after fracture, light transmittance and durability.

Volunteers sledgehammer the glass bridge
In order to demonstrate the safety, visitors were invited to hammer the samples of the slices again and again with hammers and then to step into them and jump on them. Thus, it was shown that the SentryGlas film is able to absorb impacts and can also retain the residual resistance of the wafer under extreme stress. Load tests of this type show impressively what glass can do today.


Image © Zhangjiajie Grand Canyon Tourism Management Co., Ltd. Via Glaswelt

Source: https://www.glaswelt.de/GLASWELT-Newsletter-2017-5b/Diese-Glasbruecke-laesst-sich-nicht-mit-dem-Vorschlaghammer-zertruemmern,QUlEPTc2NjU4MSZNSUQ9MTEyMTcw.html?UID=45751256771A874BA2A66576260C93A83604E2E27E980420