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s why the industry needs standardized training, testing and oversight for this work, including a practical assessment of petence. Technicians should have modelspecific training directly from the manufacturer, along with a level of practical experience. Inspectors, too, should be required to have specific technical training. They should be independent from all aspects of installation and maintenance to allow for objective decisions. Key personnel on erection crews should have standard training and testing. 。 it is more about knowing the proper sequence of what needs to be done and then following the steps, one by one, making sure each step has been successfully pleted before moving onto the next. It is essential that everyone know exactly what is going on and what the dangers are at every stage. When these needs are satisfied, crane operations should be carried out in strict accordance with the manufacturers39。s lives and property brought about great losses. According to national statistics, the departments concerned, the tower crane accident rate reached percent. Its security problem is still the urgency of the construction Loose training, testing and oversight requirements for the people who work around construction cranes have fostered a false sense of security in our industry. The recent deadly towercrane collapse at a congested New York City building site should be a wakeup call for us to question and step up our current safety practices. Training and testing is king when it es to safety. But the construction industry is putting unqualified personnel in the seats of construction cranes, even with today39。s marketing professionals! Other countries were also building noteworthy cranes. Italy, in particular, was developing into a source of innovative ideas for the in Legnano,near Milan,Carlo Raimodi built his first slewing tower crane,a classic top slewer The pany was originally established in 1863 as a foundry and had, until making its crane debut, built machines and ponents for the millwright and other industries. There was now a worldwide boom in construction and this attracted the attention of specialist equipment manufacturers, many of whom followed the launch of crane ranges with the introduction of concrete mixing equipment. This bination of equipment was supplied in a variety of forms: Reich, Ibag and Liebherr, for example, supplied cranes and concrete mixing machines designed to be used together. Important slewing tower crane manufacturer. The bridge type hoist crane car consists of protmoted anization, the car frame,the car movement anization, hoisting mechanisms and so on. Its operation structure is posed of reducer, the driving wheel group, the driven wheel group, the transmission shaft and some connect fitting. The core of this structure is the design of the reducer. This bridge type h