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Mixed use development of 5 towers 53 to 77 floors
Skyscrapers employ roof car platforms for window cleaning
Platform stabilization buttons are located every 3rd floor
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Project Description

Located on the Corniche (coastal road), in front of the Emirates Palace Hotel, the Etihad Towers Project is a prestigious mixed use development comprising 4,949,600 sq. ft. (460,000 m²) over five towers ranging from 53 to 77 floors, a large multi-level podium and a four-level underground parking facility with a capacity for more than 3200 cars. Due for completion in 2010 and valued at A $860 million (AED $2.5 billion) the Towers exceed 984 feet (300 m) in height.

Pro-Bel Technical Approach

The Etihad Towers generally employ several methods of suspended maintenance equipment - roof cars, monorail system, horizontal cable lifeline system, and a variety of U-bar safety anchor products.

Many buildings that would typically employ permanent powered platforms rigged with conventional permanent support equipment such as davits, outrigger beams, monorails, etc. are often impractical on modern skyscrapers. Many buildings - like the Etihad Towers - require roof cars in order to accommodate multi-level rigging, long span reaches, high parapets and other complicated building geometries.

For four of the "Towers", a motorized roof car system provides the requisite horizontal movement via a roof mounted track system that enables a platform to access all of the window/wall faces in this project. The telescoping, swivelling booms on these Pro-Bel roof cars have reaches ranging from 54'-0" (16.5 m) up to 70'-0" (22 mm) approximately. The fifth tower employs a fixed position roof car with a telescopic reach of 92'-6" (28.5 m). The roof car designs employ drum hoists at roof level on the roof car. This design is suited to buildings over 490'-0" (150 m) in height requiring a platform longer than 10'-0" (3 m). The added weight of suspension cables and power cord on the platform is eliminated.

Stabilization buttons (quick release pins) are located every third floor on building spandrel faces to prevent excessive platform movement in high winds. Pro-Bel engineers also designed portable re-directing extension sheaves (pulleys) at spandrel points for stabilization on other walls, a unique method of stabilization.

Workers are required to be tied off to safety anchors when working within 6'-6" (2 m) f low parapets or roof railings less than 42" (1067 mm) height. As an interesting aside, when Pro-Bel arrived on the site, some concrete slabs and walls had already been poured, necessitating using epoxy adhesive anchors.

For the podium, monorail suspension was employed, and horizontal cable lifelines were used in several areas where continuous horizontal movement was required close to unprotected vertical drops.

Click on the images below for more information on the products used in this project.

October 2009
Pro-Bel Group Corporate Head Office
765 Westney Rd. S.
Ajax, ON  L1S 6W1