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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]
A Safe Load Indicator (SLI) or an Automatic Safe Load Indicator (ASLI) is a device which is installed on mobile or portal cranes to alert the operator if the lift is exceeding the safe operating range of the machinery. [1] In some cases, the device will physically lock the machinery in circumstances it determines to be unsafe.
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]
A Liebherr LTM 1200-5.1 Crane. A mobile crane is a cable-controlled crane mounted on crawlers or rubber-tired carriers or a hydraulic-powered crane with a telescoping boom mounted on truck-type carriers or as self-propelled models. [1]