Build provided a learning curve for engineers
Special glazing required to ensure no hotspots
DUBAI // From building a steel bridge to link two towers to selecting glazing to prevent the Sun’s heat being focused on any one spot that could damage the glass facade, construction o f The Opus has been a learning experience for engineers and architects alike.
Consultancy Koltay Facades realised that the Sun’s rays could bounce off a curved surface on one side of the building’s inner space and reflect on to the opposite side. The team worked to prevent problems such as those caused two years ago when the mirrored glass on a London tower, nicknamed the Walkie Talkie, melted parts of cars and singed car- pets in shops on the street below.
“At one point we noticed that one part of the facade forms a large lens- shape and can reflect focalised solar heat to the other side of the void,” said Agnes Koltay, director of Koltay Facades.
“This focalised solar energy could lead to thermal breakage of the glass.
“To avoid problems, we needed to select glazing that has external solar energy reflectance values below a certain limit while still complying with the aesthetics intended by the architects.” Mohammed Hmeid, sales and marketing director of developer Omniyat, said a fritting, glazing pattern in the form of pixelated ridges, designed by the late Zaha Hadid, was the key.
“The flat facade contains a mirror frit that will reflect the Sun’s rays to some degree while also providing an interesting reflection when viewing the building from different directions,” he said.
“The building actually is two towers together, so they will in fact shade each other for a large part of the day.
“All glass used contains the latest UV coatings to reduce solar gain and glare within the spaces.” Constructing the 40- metre steel bridge joining the towers was another challenge.
“This involved thousands of engineering hours, producing hundreds of hand calculations for each and every steel connection to ensure its adequacy,” Mr Hmeid said.
“Because of the complexity, computer calculations required checking to ensure earthquake loads were taken into account
Meetings were held with the Dubai Creative Clusters Authority which worked with the building designer to ensure the structure’s integrity.
Experts said ambitious architecture is a showcase for the city.
“Distinctive architecture is what sets it apart from any other city,” said Janet Bellotto, an associate professor and associate dean of the College of Arts and Creative Enterprises at Zayed University.
“It can be that a unique building heightens our experience through its design and materials, reflect current trends or investigations and it considers the future of the city.
“As an artist, distinctive architecture is inspiring, it is an important part of the future city and can encourage new avenues to explore.”
Tourists, too, await the project’s completion.
“I saw photos of the building’s liquid-like insides and wanted to see it,” said Hai Zhang, a Chinese visitor taking pictures of the building after visiting the new Dubai Canal. “When I came four years ago there was no canal, now it’s full of water. Things keep changing here.”