Construction of Adrian Smith + Gordon Gill Architecture's Jeddah Tower in Saudi Arabia, which is expected to become the world's tallest building, is back on track after delays.
According to local paper Times of Oman, the project had experienced delays, but construction is now progressing.
"We have faced delays. In projects of this magnitude you always have delays ? I hope we'll recover the delays we've had," Mounib Hammoud, chief executive of developer Jeddah Economic Company (JEC), told the Times of Oman.
When complete, the skyscraper in Jeddah will rise at least 1,000 metres (3,281 feet), overtaking the 828-metre-tall (2,716 feet) Burj Khalifa in Dubai, which is currently the tallest building in the world.
The Kingdom Tower by Adrian Smith + Gordon Gill Architecture is due to complete in 2020 Adrian Smith + Gordon Gill Architecture first revealed images of the building, previously known as the Kingdom Tower, in 2011. Construction of the record-breaking project began in 2013.
The tower will contain a Four Seasons hotel, serviced apartments, office space, luxury condominiums and the world?s highest observatory.
Hisham Jomah, chief development officer at JEC, confirmed to the Times of Oman that technical issues with the concrete had meant that alterations to the design had to be made, which had delayed construction.
"Between theory and application, what has been designed and what is actually on site ? that is quite another world," Jomah said.

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