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The innovative TLS Table Lifting System from Doka, for elevating tableforms independently of the crane, revolutionises construction-site management and brings a huge boost to the efficiency and flexibility of floor-slab forming operations. In its site debut on the new Austrian Airlines Group HQ building (Office Park II) being built by Austrian contractors Gerstl, TLS speeded up the workflow and delivered some substantial savings.
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190 Doka tableforms were in service on the Office Park II site at Vienna Airport, for forming the slabs of the typical storeys. Each of the 2200 m² upper floors was cast in a weekly cycle, with up to 500 m² of slab being formed every day.
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To optimise the forming operations on this site, the innovative Doka Table Lifting System TLS for craneless “jumping” of tableforms was given its site debut. The Table Lifting System complements the Doka shifting trolley + attachable drive unit (for quick and effortless positioning of tableforms), and is another major innovation from Doka for optimising forming workflows. With the very tight schedule allowed on this site, and the large number of tableforms needed, the new Table Lifting System was able to give impressive real-life proof of its efficiency.
In conjunction with the Doka shifting trolley and attachable drive unit, this innovative system makes a major contribution towards lasting optimisation of the site logistics. The Table Lifting System moves the tableforms up from one floor to the next without any crane assistance whatever. “Jumping” the tableforms is both easy and efficient: The tableforms are moved from their original position by the Doka shifting trolley and wheeled onto the elevating-platform. The lifting operation itself only takes about 20 seconds. On the floor above, a second worker “takes delivery” of the tableform and uses the shifting trolley to manoeuvre it into its new position. After all the tableforms for one section have been moved up a floor in this way, the Table Lifting System is then raised by crane to the next storey level.
“I was pleasantly surprised at just how easy the Table Lifting System is to handle. By raising the tableforms without needing a crane, we cut costs, greatly shortened the time it took to construct the shell, and improved the overall workflow”, says foreman Gerhard Hollensteiner in his enthusiastic verdict on the Doka Table Lifting System TLS.
The craneage freed up by the TLS could then be used to very good effect elsewhere, even to the extent of shortening the overall construction time. For instance, some of the craneage released in this way enabled the site to do without concrete pumps and save costs by using skips instead. Another benefit was that costly downtime caused by insufficient craneage was reduced to an absolute minimum.
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The mast-guided system is designed to ensure the very greatest operational safety. The system features two loading-point gates attached to the structure, and an additional safety gate integrated in the platform. The control system only allows TLS operation if all three gates are closed. The all-metal platform construction comes with standard guard rails. On request, these can be complemented with extra safety grilles, to a total height of 1.80 m. With the TLS system, the tableforms can still be raised in windy conditions.
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| The new Table Lifting System TLS from Doka is very easy to handle and provides the highest standards of safety. |
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| The TLS system is a very quick method of “jumping” the tableforms that also frees up craneage. |
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| Doka tableforms and the speedy Doka lifting/repositioning systems made for highly streamlined construction of the 24,000 m² gross floor area of the new Austrian Airlines Group HQ building at Vienna Airport. |
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