Tower crane is the most commonly used lifting equipment on construction sites, also known as "tower crane". The length (height) of each section (referred to as "standard section") is used to hoist construction raw materials such as steel bars, wooden corrugations, concrete, and steel pipes. Tower crane is an essential piece of equipment on the construction site.
Tower crane, referred to as tower crane, also known as tower crane, originated in Western Europe. According to records, the first patent related to tower cranes for construction was issued in 1900. In 1905, a crane with a fixed tower body and a jib appeared. In 1923, a prototype of a modern tower crane was made. In the same year, the first relatively complete modern tower crane appeared.
In 1930, Germany had begun mass production of tower cranes and used them in construction. In 1941, the German industrial standard DIN8770 for tower cranes was announced. The standard stipulates that the lifting capacity of the tower crane is expressed as the gravity moment as the product (tm) of the hoisting load (t) and the amplitude (m).
Development
From the perspective of the development of the tower crane industry, the industry is highly related to the national economy and construction/real estate. Therefore, from the perspective of national economic trends and the development trend of the real estate industry, the development of the tower crane industry has Certain scientific significance.
In 2010, China's economy continued its upward trend since 2009, laying a good foundation for the development of various industries. The real estate industry rebounded rapidly, and the tower crane industry also saw a significant increase. According to China Construction Machinery According to association statistics, tower crane sales exceeded 40,000 units in 2010.
Affected by real estate regulation, train accidents, and the Japanese earthquake in 2011, the expansion of the tower crane market has slowed down, but it still maintains a growth rate of more than 10%.