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A 44 m high feed silo on the dockyard of Messrs. Kaatsch in Plochingen had to be pulled down quickly, efficiently and with as less harmful environmental effects as possible. The cellulose in store nearby had to be protected from dust and any concrete or rebar debris. In the course of demolishing work it had to be ensured that no debris could drop into the river Neckar just 8 m away from the demolition site. Because of the structure's height of 44 meters the demolishers GL-Abbruch GmbH, ( HYPERLINK "http://www.gl-abbruch.de" www.gl-abbruch.de) of Esslingen were faced with a demanding chore. The upper two floors were pulled down using two 5-ton mini excavators each equipped with a 200 kg Atlas Copco hydraulic breaker. A three meter high ramp was built to allow the excavator with longfront equipment to carry out the rest of the demolition work. Demolition work carried out on such high structures requires a real expert excavator operator as well as special machinery with robust and perfected demolition tools. For this kind of work GL-Abbruch use a CAT 365 BL with a 33 m long demolition boom equipped with an Atlas Copco CC 3300 U combi cutter. This combination of an excavator with a working height of over 30 m and a demolition tool weighing 3.5 metric tons is something you rarely see in Germany. To minimize the amount of dust produced during demolition, the excavator was equipped with a water spraying system and spray nozzles in the area of the demolition tool. Gerhard Ludwig, managing partner of GL-Abbruch GmbH, was impressed by the performance of the Atlas Copco CC 3300 U: "The combi cutter's design is ideal for the service on longfront excavators. The two cylinders with the cutting jaws movable on boths sides prevent strains from being transmitted to the excavator boom. Nevertheless the cutter makes a powerful and quick bite." The enormous cutting force of 109 metric tons applied at the tip of the teeth and 400 metric tons applied at the cutters gives the CC 3300 U an ample reserve of power and makes it the perfect tool not only for pulling down buildings and for industrial demolition work but also for secondary crushing and material separation. For cutting steel structures the universal jaw of the combi cutter can be replaced by a steel cutting jaw in a jiffy.
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Combi Cutter Pulls Down
44 Meter High Feed Silo
