Construction Week

THE LINK: 930-TONNE FINAL LIFT

More than 55 jacks and strand jacks, and 12.2km of strands were required for the 930-tonne final lift to join the cantilever­ed structure with the first section

-

Ithra Dubai’s One Za’abeel marks a constructi­on milestone on its 226m-long “centrepiec­e”

Property developmen­t giant Ithra Dubai, which is wholly-owned by the Investment Corporatio­n of Dubai (ICD), has marked a major milestone on it’s One Za’abeel project – the twin-tower developmen­t near Dubai World Trade Centre on Sheikh Zayed Road – with the completion of the final lift of the 930-tonne second section of ‘The Link’, which has reached its final position – perpendicu­lar to the twin towers – 100m above the ground.

The structure qualifies One Za’abeel and The Link for a Guinness World Records™ attempt as the “Longest Cantilever­ed Building” in the world.

Although The Link is a 226m-long structure made from a composite material of steel and concrete suspended perpendicu­lar to the One Za’abeel twin towers, its 66m cantilever is anchored at only one point while the rest floats above The Happiness Bridge offering views of The Burj Khalifa, The Museum of the Future and the Downtown Dubai skyline.

The Link has been constructe­d of seven steel modules – named Assembly A-G – that were slid into place before they were lifted into their final position.

The lift of the 192m-long first section of ‘The Link’ to its final position took place in September. The lift — one of the heaviest in the region — was carried out over a period of 12 days, with a total weight of 8,720 tonnes.

More than 110 special jacks and heavy-duty strand jacks were used for the operation, collective­ly by a team of global experts in the fields of constructi­on, engineerin­g, and contractin­g.

The second and final lift joined the cantilever­ed structure with the first section of The Link and was executed over the course of four days. More than 55 jacks and strand jacks, and 12.2km of strands were required to lift this final portion weighing over 930 tonnes.

Commenting on the milestones of The Link, the chief executive officer of ALEC, Kez Taylor, tells Constructi­on Week: “We were prepared for contingenc­ies, and everything went according to plan and both of these lifts went ahead as scheduled.”

“For instance, when COVID-19 hit, we were very quick to react. We used a lot of our digital technologi­es and acted on very accurate data. We set up war rooms. We made sure that we were very quick to react to the constant changes.”

The Link, when completed, will house Michelin-starred restaurant­s, observatio­n decks, an infinity pool on its roof, and an infinity view – with a glass floor and glass walls that appear to float in mid-air.

The Link – perpendicu­lar to the twin tower buildings – is 80m in height and 80m in width.

Commenting on the constructi­on of The Link, the chief developmen­t officer of Ithra Dubai, Raad Jarrah, told CW: “The One Za’abeel Towers were not built straight, vertically, like most buildings. Every level was inclined about 1.5mm as part of the precambere­d build.

“This was designed on purpose because when the two towers received the weight of The Link they moved inward towards The Link, and aligned. They would now be genuinely vertical as you would expect from any other building.”

Roof maintenanc­e is no less important than a car maintenanc­e, but because roof is out of sight, it is out of mind.

However, there has been a prevalent mindset - where we do not treat roofs as the most critical component of our building.

In some cases, even after knowing that there is a certain problem, which needs fixing at the roof top, we neglect it until it becomes inevitable.

On the other hand, unfortunat­ely there has not been any good quality product on offer specifical­ly for roof refurbishm­ent/maintenanc­e.

But what is the solution for this? The answer: liquid silicone.

Liquid silicone is a patented advanced technology, which is an ideal solution typically for any type of roof refurbishm­ent. High OPEX and repeated maintenanc­e have been the biggest paint point for most of the building owners and facility management companies.

Extending the life of your roof is one of the smartest decisions any owner, facility manager or property manager can make.

Thanks to liquid silicone, this has made it finally possible.

Liquid silicone is a cost- effective and long-term roofing solution.

Ponding Water

Inorganic nature and high energy chemical bonding of silicone (the chemical bonding of silicone- oxygen atom), makes silicone coating a permanent barrier to water, even under a ponding situation. Water content either from ponding or water vapours try to penetrate the membrane, but tight interatomi­c bonding repels the water, making silicone hydrophobi­c.

No matter how long silicone coating is exposed to ponding water, it will not let water penetrate the surface.

Cool roof and UV resistance

High surface tensions are a natural chemical tendency of silicone coating, which makes it a permanent barrier to sunlight. This makes the roof substrate cooler and UV resistant.

Ease of applicatio­n

The biggest challenge in roof maintenanc­e is the removal of existing waterproof­ing system, which takes 75% of the time and effort of the contractor.

Liquid silicone’s ability to bond with almost any existing surface has made it a revolution­ary system for roof maintenanc­e, and this factor significan­tly contribute­s towards cost savings both for contractor and for building owners.

Liquid silicone is a single component, moisture cured coating which has selflevell­ing properties, and thus all one needs to do is to open the bucket mix it, pour it, then spread it.

Durability

High elongation and tensile strengths are inherent features of liquid silicone and when these two features are coupled with excellent UV resistance and waterproof­ing capabiliti­es, it makes silicone coating the most long-lasting roofing system.

Environmen­tally friendly

Liquid silicone is engineered and formulated using “solvent free green polymers” with negligible VOC content. It outperform­s other convention­al solvent based and solvent free products, such as aliphatic urethanes, asphalts, thermoplas­tics and acrylics.

Liquid silicone is an advanced technology, which has profound economic benefits up its sleeve.

All of these features mentioned by ENERCON make it a cost- effective, sustainabl­e, and innovative solution for roofing refubishme­nt.

 ??  ??
 ?? [Photo courtesy: Aasiya Jagadeesh / ITP Media Group] ?? The Link quali  es One Za’abeel for a Guinness World Records™ attempt as the “Longest Cantilever­ed Building” in the world
[Photo courtesy: Aasiya Jagadeesh / ITP Media Group] The Link quali es One Za’abeel for a Guinness World Records™ attempt as the “Longest Cantilever­ed Building” in the world
 ?? [Image:Supplied] ?? ENERCON discusses the bene  ts of how liquid silicone can improve roof life across buildings
[Image:Supplied] ENERCON discusses the bene ts of how liquid silicone can improve roof life across buildings
 ??  ??

Newspapers in English

Newspapers from United Arab Emirates