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In the event that a collision becomes imminent, the system can send a command to the crane's control system, ordering it to slow down or stop. [1] An anti-collision system can describe an isolated system installed on an individual tower crane. It can also describe a site wide coordinated system, installed on many tower cranes in close proximity.
Tower cranes are used extensively in construction and other industry to hoist and move materials. There are many types of tower cranes. Although they are different in type, the main parts are the same, as follows: Mast: the main supporting tower of the crane. It is made of steel trussed sections that are connected together during installation.
A jib or jib arm is the horizontal or near-horizontal beam used in many types of crane to support the load clear of the main support. [1] [2] An archaic spelling is gib. [3] Usually jib arms are attached to a vertical mast or tower or sometimes to an inclined boom.
Rotating_tower_crane.ogv (Ogg multiplexed audio/video file, Theora/Vorbis, length 44 s, 640 × 480 pixels, 2.14 Mbps overall, file size: 11.23 MB) This is a file from the Wikimedia Commons . Information from its description page there is shown below.
The derrick tower can be a mast or a post with the bottom hinged at the base where all ropes meet. The top of the tower is secured with multiple reeved guys to position the top of the tower to the desired location by varying the length of the upper guy lines. The load is lifted using a pulley system connected to the top of the tower. [2]
Liebherr is a German-Swiss multinational equipment manufacturer based in Bulle, Switzerland, with its main production facilities and origins in Germany.. Liebherr consists of over 130 companies organized into 11 divisions: earthmoving, mining, mobile cranes, tower cranes, concrete technology, maritime cranes, aerospace and transportation systems, machine tools and automation systems, domestic ...
The company started out as a licensed manufacturer of the Linden Comansa America (LCA) [1] tower cranes. With time, the company started to produce cranes of its own design which were very competitive with the LCA cranes. By mid 1970s Krøll became very popular in North America and Northern Europe. By 1980 the company joined the Vølund Concern.
A self-hoisting crane changing a gear box. A Liftra crane installing a single blade on a wind turbine hub. Liftra is an engineering company which specializes in lifting and transport equipment for the global wind turbine industry. Liftra's most notable product is a self-hoisting crane used for major component exchange. [1]