Higher Heights

The all-new fully modular Scando 650 hoist offers improved performance, durability and lifting capacity, with lower energy consumption and reduced cost of ownership.

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By  Colin Foreman Published  January 8, 2005

Higher Heights|~|54 Prod Body.jpg|~||~|Alimak has taken construction hoist technology to unprecedented levels with the introduction of the all-new Scando 650; a modular system that can adapt to different applications using relatively few modules and components. Available in single or twin car configuration, the Scando 650 offers payloads of 1500 to 3000 kg/car and has a standard maximum lifting height of 400 m, which can be increased on request. The free-standing mast height is 32 m when equipped with an optional pipe support. Two or three FC frequency control or two DOL motors drive the system through a high efficiency gearbox. The Scando 650 operates at speeds of up to 65 m/min and provides more hoistpower, while using as much as 40% less power than previous Scando models. Higher speed versions will be introduced later in the year. The new generation FC frequency control gives extremely smooth starting and stopping, thereby reducing the starting current, whch then cuts wear and tear on the hoist components. Control of the Scando 650 is managed by the Alimak ALCII, a microprocessor-based fully collective control system. Capable of controlling up to six hoists, ALCII brings the efficiency and ease of use normally associated with hotel lifts to the construction site. The system remembers all calls from the landings and sends the hoist that is nearest to a landing to pick up passengers. It gets around a typical problem at construction sites, where workers push the call buttons at different landings on the same level to bring the hoists up as soon as possible, but actually end up waiting longer because the hoists are doing a lot of unnecessary trips. With ALCII, there is less stop time and greater availability for all the hoists. The system, which requires only one call station on each landing, ensures accurate levelling at landings and requires no limit cams at intermediate landings. It also includes a built-in fault diagnostics programme and a moveable control panel that can be located on either side of the car. Two car frame sizes – 2.8 m and 3.5 m long x 2.3 m high internally, are available with extension parts to provide additional length cars at 3.2 m, 3.9 m and 4.6 m. Door options include strong, light and easy-to-open aluminium door blades, with an entrance at either end of the cage. A wide C-gate measuring between 2.8 m – 3.2 m is also available along the side of the car. A wide range of ramp units is also available to optimise performance on different installations. Simple configuration saves time on installation and dismantling, and the Scando 650’s compact base design makes transportation easier and cheaper. Complying with EN12159 and ANSI 10.4 code requirements, hoists can be moved between markets and projects with minimal modification. The modular Scando 650 system offers complete flexibility with more than 60 standard configurations available for virtually every type of application. Another new feature of the Scando 650 is the A-50 mast section and module 5 rack. With 4.2 mm-thick tube walls, stiffer diagonal members and improved lattice work, the A-50 mast sections are lighter than previous masts, but they still allow the Scando 650 to climb higher without the need for additional reinforcement. Old and new sections can also be combined, however, as an adaptor plate makes it possible to use older mast ties and accessories with the A-50 mast section. The module 5 rack improves involute teeth engagement. This increases friction surfaces, reduces wear and gives smoother travel. Alimak has tested the rack on the A-50 mast to a breaking load of 48 t. The focus for Alimak engineers was to develop a concept that offers improved ergonomics and economics, and creates new conditions for long-term profitability of owners and leasing companies. “In an industry with cut-throat competition and minimal margins, it’s not enough just to make the hoists a bit better,” says Mats Hedlund, marketing manager, Alimak. “We wanted to create a concept where it is the customer who reaps the benefits. With Scando 650, those benefits include reduced costs for owners and users due to flexibility durability and accessibility, plus lower maintenance costs and improved productivity,” he continues. As reported in Construction Week, the first Scando 650 arrived in the region late last year, when local dealer INMA delivered a unit to Khansaheb Civil Engineering for the construction of Dubai’s Al Rostamani Tower. For the project, the contractor has ordered a twin cage Scando 22/32 DOL with a lifting height of 80 m and a speed of 40 m/min. The 79 m high tower features three basement levels, a ground floor and two mezzanine levels, plus 14-storeys. It will include four levels of commercial office space, nine-storeys of three to four bedroom luxury residential apartments with a separate pool level, a gymnasium floor and roof-top plantroom. The external facade will be glass clad with granite features. It will cover a 31,669 m² built-up area on a site bordered on two sites and fronting Bank Street in Bur Dubai. The tower is scheduled for completion in August 2005. ||**||

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