In one of the most complex construction lifts of its kind, Abu Dhabi-based developer Sorouh has completed the first stage of the penthouse bridge for the 65-story Gate Towers. The penthouses will represent the highest sky bridge in the world, when the project is finished.

The first section of the curved bridge weighed 750 tons. It was 40 meters long (130 feet), 30.6 meters wide (100 feet) and had a total area of 1,165 square meters (12,540 square feet), according to the company.

Four specially designed jacks were used to lift the bridge at its four corners. The penthouse bridge was raised to a height of 245 meters (800 feet) at a maximum rate of 18 meters (60 feet) per hour and required four days to complete. Once the section was in position, it took 15 days to weld and bolt together.

The fourth and final segment of the penthouse section was locked into place last weekend. The entire structure was lifted and installed in four months, the company said.

The three-tower development is part of the Shams Abu Dhabi development on Al Reem Island, which is planned to eventually house more than 200,000 people.

The penthouse bridge on The Gate will include 16 two-story apartments with indoor swimming pools. The penthouses range from 435 to 620 square meters (4,700 and 6,700 square feet). Five will feature enclosed garden areas spanning between the towers.

The sky bridge will be the highest sky bridge in the world, but the CTBUH does not recognize tallest milestones until buildings are complete.

At 245 meters the Gate’s sky bridge will be higher than the connections found at Marina Bay Sands, Petronas Towers, and the unfinished Nation Towers, which is also in Abu Dhabi.